Polytunnels, thanks to the plastic membrane on the frame, protect crops against low temperatures, snow and frost. A solid steel construction is able to withstand heavy snow loads. Hot dip galvanized steel pipes and profiles are treated with an anti-corrosive layer. This means that moisture, which results from weather conditions, watering and plants’growing processes, has no effect on the lifespan of the structure. Greenhouses remain fully functional for many years.
To start growing in winter, without heating, select plants that are cold-resistant. In areas where temperatures drop below 0 ° C and more, crops still have a chance to develop. Growth in a gardening tunnel occurs when minimum conditions for plants are achieved. Looking at the range of plants available, it turns out that there is a fair choice, between the well known and those – seemingly – “exotic”. What if winters are tough in your location? All you need to do is insulate the greenhouses against frost. There are several solutions for this:
• use an additional cover in the form of bubble wrap
• use garden boxes
• set up a mini polytunnel over plants inside the greenhouse
• spread agrotextile directly on the ground
• apply garden bell cloches
By combining several methods, the temperature in the greenhouse will remain stable, allowing crops to grow.
Plants resistant to cold
Radish – a well-known and popular vegetable that is usually associated with one standard type. However, there is no reason to limit yourself to a unique variety. It is worth choosing less popular ones. In addition to the small amount of heat required , it grows quickly. Within a month of sowing, it is ready for harvesting.
Peas – its best to start in November or February. Seeds are placed in a soil rich in minerals and humus. Insert a stake for the peas to climb on. The cover protects shoots from birds who find them very tasty.
Turnip – to make it taste sweeter and more intense, it should be planted in autumn. It will grow quickly after winter . You have to remember to provide it with the right amount of water, especially when it gets dry in the greenhouse.
Corn salad, rocket , radicchio – to be considered instead of lettuce, which in comparison contains very little nutritional value. With appropriate conditions created under cover, leaves will constantly develop, allowing a harvest of fresh salad also in winter.
Brussels sprouts – the plant is able to withstand as much as -15 ° C. It only needs a slight positive temperature for development, and the frozen ones taste even better. It is planted in the fall, to be harvested in early spring.
Crops under cover all year
Cultivation under cover in winter is not the simplest thing. Despite this, many people decide to take on such a challenge. This is a completely different experience than regular cultivation, especially for gardeners, already used to a traditional plot, having taken care of plants in a greenhouse in spring and summer. This provides a new opportunity to discover a different side to their hobby. Early 2019 is the right time to make a few decisions, including planning a modern vegetable garden.