Growing seedlings is not as simple as it may seem at first glance. If you do not take care of the seedlings properly and not create the necessary conditions for particular types of seedlings, they can die in a matter of days. The first signs of the death of the plant yellowing of the leaves. Yellowing foliage can cause stress, which, in turn, the plants receive as a result of improper selection of soil, lack of certain nutrients, lack of proper care.
If you notice that the peppers seedlings started yellowing lower leaves, and yellowing gradually rises to the upper leaves, in this case, the most likely cause of this phenomenon - the lack of nitrogen in the soil. Be sure to feed the seedlings a nitrogen product (ammonium nitrate or urea) and complex fertilizer, comprising the following elements: potassium, magnesium, phosphorus (yellow if only the lower leaves), iron, boron, zinc (if yellow and upper leaves). To understand that the seedlings do not have enough nitrogen, it is easy, first sign - blanching of the leaves with proper lighting. As soon as you notice this change, do not expect more serious consequences, and urgently feed the seedlings. To do this in five liters of room temperature water and dissolve a teaspoon of ammonium nitrate, stir and pour over plants, in any case, not pouring them. As the solution prepared according to this recipe, is very weak, it can be used as foliar feeding, that is, to spray the pepper spray.
Also yellowing of the foliage may occur as a result of the fact that at the time of transplant was not straightened roots of seedlings, which negatively affected the seedlings. In this case, will help careful removing plants from the pots and unraveling their roots. This should be done on the third or fourth day after watering, after transplanting, the seedlings must be watered with soft water at room temperature. Often the yellowing of leaves of pepper causes the damage of the roots of various pests. Inspect the ground, slightly proryhlit it, if you notice any insects, then do not hesitate and replace the soil to uninfected.
Remember, if the seedling has a height of more than 10-15 cm and yellow only lower leaves, then sound the alarm is not necessary, as this is a normal process and it is connected with growing plants. Seedlings of peppers like sun, but can not stand stay at the direct rays of the sun, so try to create such conditions so that the seedlings received only ambient light. Don't forget daily to ventilate the room with fresh air positively affects the General condition of seedlings and helps to more quickly overcome and all kinds of disease.