How to feed tomato seedlings during the growth period

When growing tomato seedlings, you must remember that the most important thing in this process is to provide the plants with optimal growth conditions and the necessary nutrition. How to feed tomato seedlings during their active growth period?
Until the plants have produced their first true leaves after the cotyledons, no fertilizing can be done. Water only when necessary.
After the third true leaf appears, it’s time to think about how to feed the tomato seedlings. After all, during the period of active growth, any plant requires nutrition for the correct formation of greenery and obtaining a good harvest.
Young tomato seedlings need phosphorus. This plant does not absorb it well from the soil and, if you do not control the situation by fertilizing it with phosphorus in time, the seedlings will slow down their growth and their leaves will turn dark purple.
In addition to phosphorus, tomato seedlings also need nitrogen. But it should be noted that you need to be very careful when applying fertilizers containing nitrogen. With abundant nutrition of this element, the seedlings stretch out, as gardeners say - fatten, which leads to a significant delay in flowering and the appearance of fruit ovaries.
If you intend to grow tomatoes in a greenhouse, then the soil for them needs to be properly prepared in the fall. To do this, it is best to pour out one bag of rotted tree leaves for each square meter of planting and then loosen them. In mid-April, it is enough to add 10 grams of nitrophoska and dig again.This procedure creates sufficient soil moisture, and therefore the tomatoes will not suffer from dry soil.