Tomatoes are a mixed culture. Someone manages to grow large crops from year to year, but someone can not find an approach to them. But to meet a person who would not like tomatoes is very difficult. The principles for growing this wonderful crop in a greenhouse and outdoors are similar, but there are differences.
Growing tomatoes in a greenhouse, you should pay attention to several important aspects: the reasonable placement of seedlings, temperature conditions, watering, plant formation, top dressing, possible overheating of the greenhouse, and the fight against diseases and pests.
Planting tomatoes in a greenhouse should be carried out taking into account the distances between plants recommended for a particular variety or hybrid. You can not plant seedlings closely, in the future this can lead to diseases and the multiplication of pests.
For the good development of tomatoes, the temperature in the greenhouse must be maintained during the day at 20-25 0 C, and at night 12-14 0 C. Sudden temperature changes during the day are not particularly desirable. If this happens during the budding period, the tomato leaves may turn yellow, and the yellowness will be with a bluish tint. If the temperature in the greenhouse drops below +10 0 C, then the pollen will not ripen, if it rises above +35 0 C, then the pollen will become sterile.
Tomatoes need regular watering. How to water tomatoes in a greenhouse is definitely difficult to say. As soon as the top layer of soil dries well, you need to water, and always warm water, under the root. These plants prefer moist soil, and the air in the greenhouse should be dry.
Tomatoes in a greenhouse are preferably grown indeterminate, with mandatory garter. It is better to form them into one stem. Stepsons must be removed, not allowing them to grow more than 5 cm. In this case, the tomatoes will not be very stressed. On the stem, it is optimal to grow 10 fruit brushes, and then remove the apical bud. If in the greenhouse low-growing varieties are grown without trellis, then you need to leave 3-4 flower brushes and remove all stepsons.
Tomatoes in the greenhouse respond well to fertilizing. Without them, a good crop cannot be grown. During the season, it is necessary to carry out at least 3-4 subcortex with organic mineral fertilizers. Tomatoes better absorb additional nutrition in liquid form. Foliar top dressing is also desirable, for example, spraying with boron-containing preparations will be useful for fruit setting.
Overheating of the greenhouse should not be allowed. To prevent it (to prevent the temperature from rising above +30
0 ), you can sprinkle the roof with chalk solution and strengthen the ventilation by opening the windows and doors. It is especially important to ventilate well during flowering, pollination will improve.
Diseases and pests need to be able to identify and know the methods by which you can get rid of them. It is much easier to prevent their occurrence than to deal with its consequences. To avoid hollow and spotted fruit ripening, you need a reasonable introduction of potash fertilizers. Cracking of fruits can be avoided by normalized watering, which is preferably carried out in the morning. Leaves are twisted and coagulated with untimely removal of stepchildren and improper formation. In order to avoid the physiological form of apical rot, proper irrigation (infrequent but deep) is needed. To avoid Fusarium fruit, you need to eliminate the high humidity in the greenhouse, i.e. air it regularly.
It is equally important to remove from the greenhouse tomatoes the lower aging leaves, especially yellowing, they are affected by diseases among the first.
If pests have appeared, then they must be disposed of necessarily. You can use folk remedies, or you can use chemical preparations - it depends on the number and stage of development of the pests.
It is difficult to foresee everything, but, following the above recommendations, you can count on an excellent harvest.