How long can a glass house last

Greenhouse Calendar

Use, maintenance, work in the greenhouse

The proud owner of one Small greenhouse (Hobby greenhouse in the garden, on the roof terrace or on the balcony) can grow and care for plants all year round - regardless of whether the greenhouse has heating or not, whether it is a simple glass house, a foil house or a greenhouse with a roof made of twin-wall sheets (polycarbonate or acrylic glass), insulating glass or special heat protection glass. However, the possibilities of use differ greatly and accordingly the maintenance and work in the greenhouse over the course of the year.

Working in the greenhouse after months
Click the month name
January | February | March | April | May | June | July | August | September | October | November | December

The small greenhouse *
Technology and use

Eva Schumann / Gerhard Milicka
Verlag Eugen Ulmer, Stuttgart: 5th edition (June 13, 2019)
ISBN 3-8186-0822-9
-> Online order *

An unheated greenhouse can also be used all year round.

A heated and artificially lit greenhouse offers even more possibilities, especially in winter. However, the costs, the energy expenditure and the maintenance expenditure are higher.



Note to the -> pictures

The small greenhouse in January

January can be characterized by very different weather. Sometimes it is very cold and dry, sometimes it snows heavily, then there are mild, sunny or rainy days.


A Snow cover on the roof acts as insulation - so it can be quite welcome at night. During the day, however, it keeps the light and the warming rays of the sun outside - so the snow cover is more disturbing than it is useful. In principle, the layer of snow on the greenhouse roof must never be allowed to get so high that the greenhouse roofing or the structure is damaged. If there are light-hungry plants in a warm greenhouse, it is particularly important that there is enough light - i.e. H. Snow should always be cleared as soon as possible and on cloudy days an additional exposure can be recommended.


in the unheated small greenhouse of a vegetable lover In January and February there are still the wintering lamb's lettuce and spinach. If the plants are not yet very large, they can be covered with one or two layers of fleece - this increases the temperature in the plant area by a few degrees and protects against deep night frosts. On frost-free days you should ventilate during the day (and possibly also remove the second layer of fleece) in order to avoid excessive temperature fluctuations in the small greenhouse and at the same time to let as much light as possible on the plants. At this time of year, watering is only used when the soil is dry. If the plants are already ready for harvest, spinach and lamb's lettuce can be cut on frost-free days.


If the snow load becomes too heavy, it must be turned away from the greenhouse roof.


Become Potted plants overwintered in a small, frost-free greenhouse, they have to be watered if necessary. However, you always let them dry well before you water again. In addition, potted plants must be checked regularly for pests and diseases, because aphids, spider mites and other pests often multiply particularly well in the low-light season - especially in a narrow stand of plants. The sooner you take countermeasures (cut out the infestation, inject environmentally friendly preparations, etc.), the better. Wilted leaves are also regularly removed and dead shoots cut out to improve ventilation in the stand and prevent diseases from spreading.


display

display

in the heated small greenhouse with collections of plants (cacti, orchids, exotic fruits, tropical plantings, etc.) must be air-conditioned with heating, shading and ventilation in such a way that the specific minimum of the respective plants (depending on the climate at home) is not undershot and the maximum is not exceeded. Warm greenhouses should be particularly well insulated. Damage to the roofing or leaky doors and window openings must always be repaired immediately. Energy can be saved by subsequently insulating the greenhouse with bubble wrap, installing energy screens under the roof and similar measures. Even in the warm small greenhouse, pests must be checked regularly. In a warm greenhouse with additional exposure, beneficial insects can also be used to control pests - however, there could be difficulties with shipping at low winter temperatures.

in the warm growing greenhouse The first sowing begins in January, for example kohlrabi, lettuce and radish are now being sown, which are to be planted in a cold house at the end of February / beginning of March. If you want to ensure that not everything is ready for harvest at once, you sow in batches - i.e. smaller quantities every one to two weeks - for later planting. However, with later batches you have to accept that they may not have been harvested if you pick tomatoes, peppers, cucumbers, etc. in May. Want to plant summer crops in the vegetable greenhouse. But you can also plant the later sentences - instead of in a cold small greenhouse - in cold frames or in the open field.


From January sowing and growing young plants in the heated greenhouse begin

The first summer flowers are now also sown in the warm small greenhouse in January: Begonias, slipper flowers, busy lizards, lobelia, geraniums and petunias. For germination, the sown seeds need daytime temperatures of around 18 to 24 degrees Celsius, at night the temperature can be a little cooler.

After pricking out (separating in pots, pressed earth pots, bowls or other vessels), the young plants are placed in a cooler place and cared for, fertilized and watered until they are ready for planting in the final location or the right time for planting outdoors - for most of them is the time in mid-May after the ice saints.

On cloudy days, additional exposure is recommended when growing young plants in the greenhouse so that the plants do not become long-necked. On the other hand, sensitive plants need to be shaded on very clear, sunny days.


display

display

Back to top


The small greenhouse in February

In the unheated or frost-free cold house you can use the Soil preparation for the first vegetables begin. At the end of February / beginning of March, kohlrabi, radish and lettuce can be planted. With fleece you can also protect them from deep frosts in an unheated greenhouse. At particularly low night temperatures you should even cover them with a second layer of fleece or overnight Newsprint cover. Besides, you can at night Straw mats Place on the outside of the greenhouse - they also keep the night-time cold out. From the end of February / beginning of March, you can sow vegetables directly into the ground in an unheated or frost-free small greenhouse or in the cold frame - e.g. B. spinach, cress, radishes, peas etc. On frost-free days, both the cold frame and the greenhouse must be ventilated in good time during the day, otherwise it will quickly become too hot during the day and the fluctuations between day and night too great.

Potted plants are also regularly checked for pests and diseases in February and watered if necessary. If the potted plants have only been cut a little in autumn, the final cut can now be made in the small greenhouse. Container plants that need a larger pot and / or fresh soil are also repotted in February. Even long-term fertilizers (e.g. ripe compost) can now be added to the top substrate layer of the bucket. Sufficient ventilation during the day ensures moderate temperatures in the greenhouse so that the plants do not sprout too much, because these soft shoots would be particularly sensitive to frost and susceptible to pests. And who the plants - z. B. because of a lack of space - want to put them outdoors as early as possible, prefer to keep the plants cool in the small greenhouse and harden them in this way.


Wintering in potted plants in a small greenhouse

However, the respective plant compatibility must be taken into account, because the plants in the tub are from very different climatic zones - one Hibiscus rosa-sinensis-Hybrids from the South Seas need a lot warmer than a fig tree from the Mediterranean area.

In 18 to 24 degrees warm Growing greenhouse the next sets of vegetables (kohlrabi, lettuce and radish) are sown - they can be planted in the open-air bed with fleece protection at the end of March / beginning of April. If you want to plant peppers and aubergines in a frost-protected cold house in April, you have to sow them in February. It is also sowing time for summer bloomers such as snapdragons, salvias, bell vines, marigolds, verbenas and zinnias.


display

display

Back to top


The small greenhouse in March

If the snow is gone and spring is in sight, any winter damage / winter consequences on / in and around the greenhouse will be removed and the rain gutter will be cleaned and repaired if necessary.

In an unheated or just frost-free heated vegetable greenhouse, lettuce, kohlrabi and radish can still be planted. Spinach, peas, radishes, carrots, lettuce and garden cress can also be sown directly into the ground (see also → Early vegetables in the small greenhouse).

Hibernating potted plants will continue to be watered if necessary and regularly checked for diseases and pests and, if necessary, control measures will be taken (see also February). If you haven't repotted and cut in February, you can still do it now. The same goes for fertilization. Potted plants that are less sensitive to frost, such as native fruit trees, dwarf palm Chamaerops humilis or Losbaum Clerodendrum bungei, which have been in a cold house and have hardened, may be put outside in a protected place from mid / late March.

The same applies to the plant collections in the heated greenhouse as in February.

Tomatoes and melons can be sown from March in a warm growing greenhouse or in a growing cabin (18 to 24 degrees Celsius). After germination, they are separated in pots and in mid-May they can be planted in a raised cold frame or in a greenhouse. Many bedding and balcony plants such as foxtail, summer aster, annual delphinium, Levkojen and hussar button are now sown and brought forward in March. As soon as the seeds have germinated and the small plants can be grasped with the fingers, they are pricked out - i. That is, they are individually transplanted into pots, spring peat pots, pressed earth pots or the like. After pricking, the young plants can be placed in a place a few degrees cooler.

Begonia lovers now get the tubers of their tuberous begonias from last year from the winter storage (usually the cellar) in March and place them in flower boxes, bowls or pots filled with moist soil to drive them


Back to top


The small greenhouse in April

Spring is in full swing - the weather is getting warmer, the plant growth is getting stronger. Timely is all the more important Ventilation in the greenhouse as well Watering and fertilizing of the plant protégés - whether young plants, potted plants or plants in plant collections.

The starts in April Harvest time in the small greenhouse used for vegetable gardening. And that's a good thing, because we need it from the end of April / beginning of May Space for tomatoes, cucumbers, peppers and other summer vegetables. But be careful: These plants do not tolerate frost - so it is better to listen to the long-term weather report and possibly plant out a little later. Or you can plant early, cover the small greenhouse with straw mats at night in an emergency or set up a frost guard heater.

The frost-resistant or hardened ones Potted plants gradually migrate to the open air in April, depending on their sensitivity to frost. But this only applies to those who were overwintered in the cold house and are well hardened. Otherwise it is better to wait until there is definitely no more frost. In the case of plants from tropical latitudes, you wait until the night temperatures are safely above 12 to 14 degrees Celsius before "wintering" (putting them outside). It is even safer: You can keep them all year round in a small greenhouse with adjustable temperatures, humidity and shading options.


Spring vegetables in the unheated small greenhouse

In the warm Growing greenhouse The fast-growing summer flowers are now sown: cape baskets, sunflowers, morning glory, goblet mallows and sweet peas.


display

display


Back to top


The small greenhouse in May

In May there is a lot going on in the garden, because after the ice saints, many plants that have been lovingly grown in the small greenhouse can be planted in cold frames and outdoors Bedding and balcony plants can be planted in beds, window boxes, pots, hanging baskets and pots and placed outdoors. If this frees up more space in the unheated small greenhouse, you can also do this here Summer vegetables like -> tomatoes, aubergines, melons, beans, -> peppers, chilli, cucumbers or zucchini. The soil is prepared by loosening the soil and adding compost to the top soil layer. The compost acts as fodder for soil life and as a sustainable fertilizer for the plants.

In order to make good use of the space in the small greenhouse, tall growing vegetables like stick tomatoes guided upwards on sticks, spiral sticks or strings. Some vegetables such as B. cucumbers, pepino or aubergines are even "educated" extra (trimmed to one to three shoots) and these shoots are tied up on strings or sticks. Since it takes a long time for the ground to be covered and shaded by the summer vegetables, you can spread mulch between the rows of new plantings, sow a green manure or sow or plant vegetables, herbs or flowers that remain small - for the last option, e.g. B. radishes, lettuce, cress, basil and small marigolds. Speaking of which: radishes can also be preferred in the warm and then planted between the rows as young plants - this gives them a head start over directly sown radishes.


Cactus greenhouse

After the ice saints - i.e. after May 15 - frost-sensitive potted plants and also plants from plant collections such as less sensitive cacti or ferns are allowed outside. However, those who stay in the greenhouse also need a lot of fresh air. You only have to be careful with plants from the tropics with us all year round - they are safest all year round in a warm greenhouse with the appropriate humidity and - depending on the type of plant - shading.

in the Growing greenhouse it now continues with the biennial bedding and balcony plants: z. B. Bellis, forget-me-nots, pansies and gold lacquer are now sown (and planted out a few weeks later) so that they bloom in the spring of the following year.

The small greenhouse *
Technology and use

Eva Schumann / Gerhard Milicka
Verlag Eugen Ulmer, Stuttgart: 5th edition (June 13, 2019)
ISBN 3-8186-0822-9
-> Online order *


Show

display

Back to top


The small greenhouse in June

In the small greenhouse used for vegetable gardening, June is mainly one Care time: -> Stick tomatoes are stripped (side shoots removed) and - like cucumbers, aubergines, pepinos, melons, tall chilli varieties, etc. on sticks, spiral sticks or strings are directed upwards. There are support rings for medium-sized paprika and chilli varieties or wide-meshed (wire) nets are stretched so that the plants do not fall over so easily. Care also includes removing dead leaves regularly and watering and fertilizing the plants as needed.

A Watering tip: If possible, do not pour over the plants, but rather in the root area - this keeps the humidity low. Pressureless ones are helpful Drip irrigation - they save water and ensure a dry climate, which is good for most plants (except tropical plants) because they are then less affected by diseases. Timely is also important in this regard Ventilation - Condensation should never form on the leaves - because diseases such as the dreaded late blight and brown rot can only settle on wet leaves and attack the tomatoes (or potatoes).

From mid-June it will be in the warm Growing greenhouse started sowing endive lettuce and late cauliflower so that the young plants are ready to plant in mid-July. Biennial flowers are also sown in the small greenhouse from June. B. Mustard, Mary's bellflower, hollyhock and forget-me-not.

All Plants in the greenhouse must be checked regularly. You should examine the individual plants from top to bottom and also look at the underside of the leaves. If the lower leaves are yellow and the plant is growing slowly, this may be an indication Nutritional deficiency be. If the plants are dark green and the upper leaves are rolled up, you may have too much fertilized and should prescribe a diet for the plants. Brown leaves - especially the lower leaves - are removed. This way, the plant population is also better ventilated. Become Pests found like spider mites, whitefly, or aphids, something should be done about them before they spread too much. In July you can counter this with biological pest control. To be Beneficial insects (natural opponents of these pests) in the greenhouse. These beneficial insects can be bought from beneficial insect producers. By not spraying, the natural enemies that have flown in from outside (ladybugs, lacewings, parasitic wasps, predatory flower bugs, etc.) also have the chance to multiply and help fight them. If you have missed the right time to use beneficial insects and the pests have already increased significantly, only beneficial and environmentally friendly pesticides will help, for example pesticides based on potash soap, which you sprayed several times in a row at intervals of a few days according to the instructions.


display

display


Back to top


The small greenhouse in July

It can get very hot in the small greenhouse by July at the latest. With ventilation and - if the ventilation openings are not sufficient - shading (applying shading fabric or painting with flour and water), it must be ensured that the temperatures do not rise above a level that is tolerable for plants. You should also make sure that no dew forms in the small greenhouse, because damp plants are more likely to be attacked by fungal diseases. With tomato plants in particular, it is important that the leaves do not get wet, as otherwise they could be attacked by the dreaded late blight phytophthora - a dangerous disease in tomatoes and potatoes.

The plants are now in their main growing season and must be adequately watered and fertilized. If you observe your plants closely, you can roughly assess the fertilizer status: light old leaves and generally small leaves as well as slow growth can indicate a nutrient deficiency (especially nitrogen deficiency). Dark, tufted leaves - usually seen most clearly in the upper part of the plant - on the other hand are often a sign of an excessive supply of nutrients (especially nitrogen). Depending on whether plants are oversupplied or undersupplied, one should fertilize or put the plants on a diet. In the event of an acute deficiency, liquid fertilizers that are added to the irrigation water have the fastest effect.


Tomatoes and marigolds in the greenhouse bed

Now will too Chinese cabbage and endive used. The Chinese cabbage is planted outdoors at the end of July, the endive salad goes into the greenhouse and is ready for harvest in autumn.

Who his tropical plants If you want to multiply, you can cut and stick cuttings of bougainvillea, citrus, cylinder cleaner, hibiscus and others in August and root them in the small greenhouse.


display

display

Back to top


The small greenhouse in August

The starts in August Main harvest time for summer vegetables but at the same time one or the other hobby gardener or plant lover is already feeling sad because the gardening season outside is already in the final sprint. The small greenhouse gardener can be more relaxed because for him the gardening season is from January to December.

Ripe, fully aromatic tomatoes, fruity peppers, fiery chilli peppers and crunchy cucumbers are harvested in August. The tops of tomato plants are now cut off so that only the grapes that have already formed ripen, but no further grapes are formed, as they would no longer ripen - at least in the unheated greenhouse / cold house - and only waste the plant's strength.

In mid-August, the spinach is sown for the autumn harvest.

For potted plants and all other plants that are overwintered in the cold house, fertilization (especially nitrogen) is slowly stopped from the end of August / September (depending on the region). The plants are prepared for the winter dormancy phase and are not stimulated to sprout young soft tissue.


Melon in the small greenhouse

This makes them less susceptible to low temperatures, diseases and pests.

Greenhouses, which house heat-loving collections of plants, are best done in a warm phase in August clean and waitbecause you can then put the plants in a shady place in the garden for a short time. The windows are cleaned inside and out with a high-pressure cleaner, a hose with a brush attachment or a sponge and lukewarm water (possibly with the addition of a special cleaning agent for the respective material - note plant compatibility). The gutters are also emptied and - if necessary - repaired. In addition, defective windows are replaced, leaky doors and windows are repaired, hinges are oiled, automatic fans and heating systems are checked and wooden structures are treated with suitable wood care products.


display

display

Back to top


The small greenhouse in September

In the small vegetable greenhouse, the summer vegetables such as tomatoes, eggplants, cucumbers, melons, beans, etc. are gradually grown in September. cleared away. If the beds of the small greenhouse are free, you can do them right away Clean the glass of the greenhouseso that as much light as possible comes through the greenhouse cover in the low-light autumn and winter time. Also Leaks should be repaired now, rusty spots treated, Oiled hinges and poorly closing doors and ventilation flaps are repaired. In the case of foil greenhouses whose foil is already old and no longer translucent and which are to be used over the winter, the old foil covering should be replaced with a new one. In the case of foil greenhouses that are empty over the winter, the foil is only changed in spring.

If the small greenhouse is ready for the next few months, you can Sow autumn and winter vegetables: These are z. B. winter purslane, spoonwort, radishes, spinach and lamb's lettuce. Endive and lettuce can also be planted in September.

If you want to clear your unheated small greenhouse of the summer vegetables as late as possible (e.g. because the paprika and chilli plants are still so beautiful), but still want to cultivate lamb's lettuce and spinach over the winter, you can move the vegetables to another place and then later plant out in small tuffs in the greenhouse.

In September the frost-sensitive potted plants / potted plants brought back to the small greenhouse for wintering. Tropical plants in particular want to be warm in winter (Hibiscus rosa-sinensis hybrid, coconut palm, dragon tree, Allamanda, Medinilla, flamingo flower, etc.) - and migrate back to the windowsill or in an appropriately air-conditioned greenhouse at the beginning of the month. Other potted plants are not quite as sensitive and can stay outside until the end of the month or longer.

Garden tip: Basically, you should try to keep the time in the greenhouse for potted plants (except those from tropical climes) as short as possible - so give them as late as possible and clear them out as early as possible, depending on compatibility. However, this is only possible with less sensitive species and cool wintering in a more or less forced rest phase.

If you want to early flower bulbs, you can plant them in pots and bowls in September and October and place them in a dark, cool place.


display

display

Back to top


The small greenhouse in October

Now, at the latest, start preparing the greenhouse for winter. Anyone who has not brought their greenhouse up to scratch in August or September should have the greenhouse inside and outside at the beginning of October clean, defective disks replace, Doors and windows close tightly check and if necessary repair, Oil hinges, etc., check automatic ventilation flaps, repair rust spots or paint damage, etc. The Gutters must be checked regularly in autumn because of the leaf fall and emptied if necessary

Until the end of September / beginning of October you can Sow spinach in a small greenhouse to overwinteruntil mid-October Lamb's lettuce. Both hibernate in the greenhouse and, when they have reached the appropriate size, can be harvested on frost-free days.

Who later chives from chives balls in a warm greenhouse float have to dig up the bales at the end of October / beginning of November and store them outdoors. If you want to drive one or more bales from the end of the month, you first put them in water at 40 degrees Celsius for five hours. They are then potted and placed in a warm greenhouse at 20 degrees Celsius or planted there. It takes about three weeks from the time it is set up for the chives to be ready for harvest. The Hot water treatment has to be done only for the first few sentences. Once enough cold has acted on the chives, they no longer need this "break".

In September the cold-sensitive ones Potted plants already placed in a frost-free small greenhouse. In October, the less sensitive potted plants (mallow, oleander, shrub marguerite, camellia, hammer shrub, angel's trumpet, coral shrub, strawberry tree, etc.) are gradually returned to the small greenhouse


Chives forcing in the greenhouse

- only those who can tolerate light frost are allowed to stay outside for a while. Due to a lack of space, the potted plants are usually cut back a little when putting them away, and in spring the final cut is then carried out according to the species or variety. All potted plants are checked for diseases and pests when they are put away. Diseased shoots are cut out, wilted or diseased leaves are removed and existing pests - e.g. B. by spraying an environmentally friendly preparation (z. B. based on potash soap), before the plants are placed in the wintering place in the small greenhouse or a similar place. Spreading purchased beneficial insects is i in a cool greenhouse at this time of the year. d. Usually not useful, as low temperatures and little light make them too slow and therefore not very effective. In autumn and winter, potted plants in the frost-free greenhouse are not fertilized and only watered as required - waterlogging can be fatal in this phase.

Even with the Plants in the warm greenhouse fertilization is now stopped. In October at the latest, the shades that should protect against the blazing sun in summer are removed - with the exception of sensitive ferns.


display

display

Back to top


The small greenhouse in November

Be in the wild now Storage vegetables harvested - they can be stored in an unheated greenhouse, for example in an underground pile. To a Ground rent the soil is dug 60 to 70 centimeters deep, the vegetables are placed in them and the spaces in between are filled with earth and sand. The ground rent is covered with straw. Important: only store undamaged, healthy vegetables. On frost-free days it is necessary to ventilate, on days with deep frost, additional straw mats are placed on the greenhouse to improve the thermal insulation. Vegetables can also be stored in a frost-free, heated cold store - however, the temperature should only be around 1 to 5 degrees Celsius, if possible not warmer. The stored vegetables do not even have to be buried, but can in buckets and boxes be kept - the gaps are filled with sand, and everything is covered with straw.

Spinach, lamb's lettuce, spoonwort, winter purslane and other cold-tolerant vegetablesthose who overwinter in the unheated small greenhouse need fresh air on warm / sunny days - i. i.e. it must be ventilated during the day. However, as night falls early, the ventilation flaps can also be closed earlier. It is only watered when necessary. A fleece cover is only put in place if deep frosts are predicted - in November this is only the case in some years and in some regions.

The last will be in November Potted plants (Aukube, laurel, olive tree, Mediterranean snowball, local fruit in the tub, etc.) Made it into the frost-free small greenhouse.

The Chives forcing was already declared in October. But also parsley can be in a warm greenhouse at 8 to 18 degrees Celsius float. For this purpose, root parsley is cleared in the open-air bed or roots are obtained from the gardener. The roots of the root parsley for forcing should be more than 2 centimeters wide at the top, the foliage is shortened to 3 centimeters above the root. The roots are planted close together in beds or pots, with the root shoulder above the ground. Then it is poured well so that the soil is muddy to the roots. It takes 4 to 6 weeks for root parsley to be harvested.

Especially if you heat your small greenhouse frost-free or warmer, you should check again whether the doors and ventilation flaps close properly. You can do greenhouses too Isolate with bubble wrap afterwards and thus reduce heat losses and save heating costs.


display

display

Back to top


The small greenhouse in December

All plants are updated regularly Diseases and pests controlled. Wilted leaves are removed, diseased shoots cut out.

snow should be turned away from the greenhouse roof - on the one hand, so that a lot of light can penetrate into the greenhouse, on the other hand, because high snow loads can damage the small greenhouse.

Small greenhouses without heating or only with frost-free heating with hibernating salads / vegetables (see November) and / or potted plants that are not too cold-sensitive must be ventilated on frost-free days, especially in the sun at noon.

The in September for the Earlier potted bulbs are placed in a warm greenhouse in December and driven forward.

Around heating costs To save, you can cover heated small greenhouses with straw mats at night.


Warmth-loving plants such as bougainvillea or poinsettia need a warm greenhouse or cabin

The current gardening year is now also coming to an end in the small greenhouse, the next is imminent. Now is the time to request the first new seed and plant catalogs and the sowing and planting for to plan the next year.


Show

display

This website uses cookies to enable modern functions, for statistical purposes and for the placement of advertisements. By using the website, you agree to this.OKFind out more.