Depending on what kind of greenhouse we have, its management may be different. Unheated greenhouses are usually used from mid-March (weather permitting). On the other hand, heated greenhouses offer us much more possibilities - their production can be all-year-round or almost all-year-round (excluding the coldest months of the year).In the initial period, we usually grow seedlings of vegetable and ornamental plants.
The earliest we start producing seedlings of species with low thermal requirements, which are intended for the earliest field plantings, e.g.cruciferous vegetables, lettuce, leeks and onions.We have to wait a while before cultivating thermophilic species - if they are intended for cultivation under cover, we can also start their production in March.We usually start producing seedlings for tomatoes, peppers, eggplants or cucumbers for field cultivation at the beginning of April, so that they are ready for planting in mid-May.
Remember, however, that lower than optimal temperatures contribute to the extension of the production time of vegetable seedlings, as well as insufficient light.In such situations, you should either wait with the start of production, or equip the greenhouse with additional systems for heating and lighting plants.A good solution in small greenhouses are openwork metal shelves, which do not shade the greenhouses already growing in the ground. plants.
On them we can produce seedlings for later plantings, and in the greenhouse, from March we can grow lettuce, dill, parsley, lamb's lettuce and radish.