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Despite the often bitter cold, you can prepare your greenhouse for the season at the end of February. There are some types of vegetables that you can sow again at the beginning of March. Read here what they are.Spinach - Sow in March and harvest in May
Greenhouses are popular among hobby gardeners. This is because a greenhouse can benefit from fresh vegetables all year round. In contrast, the vegetables from the supermarket can now really pack up. But every type of vegetable has its own requirements. If these are not taken into account, it can quickly happen that the plant bears no fruit. Then you have to resort to the supermarket vegetables again or you do without them altogether.
It is particularly difficult to plant vegetables over the winter months because the conditions such as heat and sun are often not met or only rarely. In winter it is more the case that the greenhouse serves to protect your plants. Large potted plants can be stored well protected in the greenhouse. The month of March heralds the start of the season. The sun can be seen more and more often and also has the power to heat a greenhouse to the required temperature.
Sow early vegetables in the greenhouse
There are some vegetables that can tolerate the sometimes still very cold soil and can be planted without problems in March.
Spinach to become strong
Children love spinach, after all you get as strong as Popeye. But adults also like to eat spinach because it is simply delicious and, above all, healthy. Spinach, which you sow in March, can be harvested and tasted from May.
The spinach seeds are planted about 1 to 3 centimeters deep in the ground. Then cover the grains with a little soil, but do not press them down. There should be a gap of about 15 centimeters from row to row.
Always keep the soil moderately moist, but never too wet. To prevent the well-known mildew, you should always ventilate your greenhouse well.
After about 8 weeks you can harvest your first spinach. Cut the spinach off just above the ground. If you make sure that you leave the spinach hearts standing, you can harvest spinach up to four times from the same plant.
" Tip: When the plant begins to bloom, the spinach should no longer be harvested.
Radishes for the salad
Even if you raise radishes in the greenhouse, you have fresh vegetables on the table in no time. Radishes don't need much - a bit of manure that should be brought in in the fall, moist but not wet soil and light. If your radish plant does not get enough light, it shoots upwards and does not form bulbs.
Insert the seeds 0.5 to 1 cm deep into the soil at a distance of at least 5 cm. Pay attention to the distance, otherwise the plants grow too close together and do not get the necessary light.
Prick out the seedlings if they grow too close together. Radishes need even moisture. So always water regularly, but not too heavily. The plants do not tolerate waterlogging at all.
Furthermore, radishes prefer loose soil. So loosen the soil around the radish plant regularly. This creates strong and even bulbs.
Once the radishes are ripe, they can be harvested. If you leave the bulb in the soil for too long, it will eventually become soft and furry.
Carrots as a snack in between
If you plant carrots in the greenhouse in March, you can harvest your carrots before many others and enjoy the unique taste. In addition, carrots are also great with tomatoes. So you can put them in a bed without any problems.
When you put the carrot seeds in your bed, make sure that the soil is not too moist so that as many seeds as possible germinate. The seeds are placed about 1 to 2 centimeters deep in the earth. Carrots can be sown close together, since not all seeds always germinate.
As soon as the seeds have germinated on the surface, you should prick out the seedlings. If the plants grow too close together, the fruits will only be tiny. It is also very important that you keep the bed weed-free. So the plants have enough space to grow and are not overgrown.
Water the carrots regularly, but not too much. If you take your time with the watering and then give the carrots an extra portion of water, the carrots may burst.
At which stage you harvest the carrots is up to you. If you prefer the small tender carrots, then you can pull them out of the ground in good time. If you prefer to harvest larger carrots, you have to wait a little longer. Here it helps to just have a look in between.
Tomatoes as fillers
Whether small cocktail tomatoes or large vine tomatoes - tomatoes are simply delicious and also healthy. If you do not buy young plants but sow seeds, you have even a greater variety of varieties. Once you've found a variety that you like, you can even multiply it yourself. (NDR guide grow tomatoes with seeds yourself)
You can bring the seeds into your greenhouse at the beginning of March. Put the seeds in the soil at a distance of about 3 centimeters. Then you have to cover the sowing with about 5 centimeters of soil, since the tomatoes are among the dark germs.
When the tomato plants have formed their first real tomato leaves, you need to prick the plants out. After the ice saints and when the plant has reached at least 30 centimeters, you can put the tomatoes out in the garden bed. However, tomatoes achieve a higher harvest yield in a greenhouse.
When the tomatoes are ripe, you can simply pick them and eat them straight away.