COMMON LETTUCE PROBLEMS:
Aphids- can buildup on the undersides of leaves.
Foliage rots can be a problem in hot or wet seasons. Provide good soil and air drainage to help minimize damage. If seeds do not germinate it may be due to insufficient moisture. Also seeds should not be saved from year to year.
Tipburn- is a physiological condition that causes lettuce to "die back" at the edges of the leaves. It results from a change in the moisture relationship between the soil and the plant. Clip off any brown leaf tissue and use the remainder of the leaf. Frequent light watering helps to prevent tipburn. Some varieties are resistant to this condition.