Raising seedlings can be difficult: Lack of nutrients makes young plants susceptible to fungal diseases and causes them to wilt quickly. Let’s look at what young seedlings can suffer and how to prevent them from dying.
Yellowing of lower leaves
Most of the time, seedlings yellow due to lack of nutrients, poor soil quality, lack of light and moisture. Fertilization is necessary to stimulate the plants to grow rapidly and give them resistance to unfavorable factors.
If the seedlings grow sluggishly, their lower leaves turn yellow and the upper leaves have a dull green color, it means that the young plant has a nitrogen deficiency. Tomatoes, peppers and aubergines often suffer from a lack of this element.
The problem can be solved by spraying the plants with a urea solution. To prepare it, dissolve 1.5 g of dry substance in 1 liter of water.
It turns purple.
When there is a phosphorus deficiency, the stems and leaves of the planting material turn red or purple, curl up and fall off. This also occurs due to root chilling. If insulation under the containers with shoots does not help, it is necessary to apply a phosphorus fertilizer.
Phosphorus suspension for seedlings is prepared as follows: 2 tablespoons of superphosphate granules pour 300 ml of boiling water, insist a day in the heat. Then 150 ml of the resulting liquid is diluted with water in a bucket, the prepared solution is used until the summer.
Drying edges and spots appear
Potassium deficiency causes the seedlings to turn yellow and the edges of the leaves to dry out, and there are bright red spots on the leaf plate itself. Potassium deficiency is most common in cucumbers.
To compensate for potassium deficiency in young plants, it is necessary to prepare a special nutrient solution. It requires 1.5 g of potassium sulphate diluted in 1 liter of water. The resulting composition should be watered shoots.
Thinning of the stem at the root
Root collar rot of plants leads to thinning and darkening of the stem, this disease is called black stem. The cause of this painful seedling condition is a fungal infection that can kill all shoots. Vegetable and flower crops are often affected by this disease.
To prevent blackleg, it is recommended to soak the seeds in a manganese solution or dip them in a special preparation “Fitosporin” before sowing. One day after picking the seedlings, it is also recommended to treat the soil gently, without touching the leaves, with a preventive composition.
Using peat pots and growing pots instead of wooden boxes and plastic containers also helps to reduce the risk of plant diseases.
Diseased shoots cannot be cured and are removed to avoid infection of the entire planting material.