- 1). Examine the seedling to determine whether the problem is dampening-off. Dampening-off is what happens when a seed germinates, the seedling appears to be healthy and suddenly it wilts and dies. A sudden death is caused by fungi. This occurs when soil and air temperatures are above 68 degrees F.
- 2). Look for spindly stems with large spaces in between the leaves on the seedlings. This occurs from inadequate lighting or excessively high temperatures or overcrowding. Thin the seedlings if necessary, move them to a slightly cooler spot and give them more light. You can also let them get morning sun and then move to a shady spot for the afternoon.
- 3). Examine leaves for discoloration, which could be caused from a nutrient deficiency. Pale yellow leaves are an indication of a nitrogen deficiency. Leaves that turn brown or bronze around the edges could be caused from a potassium deficiency. A reddish purple color on the underside of the leaves is probably caused from a phosphorous deficiency. Give the seedlings a weekly feeding of a complete liquid fertilizer that has trace minerals, using half strength of the recommended amount.
- 4). Examine the seedling and its surroundings if you see mold. Mold can be caused from excessive fertilizer, over-watering, poor drainage or poor air circulation. Use an old butter knife and carefully scrape the mold off the surface and cut back on watering and fertilizing. Also be careful not to get the leaves wet when watering; use a watering can and pour the water just on the soil at the base of the seedling.Use a small fan to improve the air circulation and choose a better growing medium the next time.
- 5). Try several of the solutions when attempting to diagnose problems with seeds and seedlings. Sometimes it might be just one problem, but it could also be caused by several things.
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