Fertilizing tomato seedlings is advisable when the type of seedlings begins to change, but if seedlings with good thick dark green leaves, with healthy stems, then fertilizing can only harm, for example: an excess of nitrogen leads to the development of foliage, but in no way, no fruit, and young leaves will begin curl up and lose their beauty.
The same applies to calcium and potassium, plants consume very little of them and their deficiency can appear only when the seedlings “live” for a long time in a small pot and are watered with sterile water. In fact, it is not necessary to feed the seedlings (although the opinions of gardeners, of course, differ on this), the main feeding should begin when the plant is transplanted into open ground, a greenhouse, then various deficiencies of microelements may appear.
If you use a special soil mixture made for this purpose for seedlings, then feeding for seedlings is definitely not needed, an excess of fertilizers will only lead to negative consequences. Seedlings should be stored in a bright, cool, well-ventilated area, watered regularly, but do not overflow, and dive during a dive.
When is top dressing of tomato seedlings needed?
- lack of nitrogen. The plant is stunted, the leaves turn yellow and late, and this applies to the lower leaves, since the plant transfers the necessary nitrogen to the upper leaves;
- lack of phosphorus. A distinctive feature is the purple color of the veins, stem and underside of the leaf;
- lack of iron. It is manifested by chlorosis: drying of the top, yellowing of the leaves, dying off of the roots.
If feeding is necessary, then you need to use a complex fertilizer or fertilizer for tomatoes and do not exceed the recommended dose.