Why Are the Leaves on My Tomato Plants Curling up?

Answer

Tomato leaves curl up as a result of curl leaf virus, physiological curl, or herbicides-caused curls. However, scientific research has shown that leaf curl does not affect the quantity and quality of tomatoes that are produced. Inadequate amount of water and over-pruning of the plant can also lead to leaf-curl.
Q&A Related to "Why Are the Leaves on My Tomato Plants Curling..."
Excessive moisture can be the cause of curling tomato plant leaves. The curling of a tomato plant's leaves is the plant's physiologic response to exterior conditions in the soil or
http://www.ehow.com/list_6513588_causes-curled-tom...
The rolling or curling of tomato leaves can be a symptom of environmental stress,
http://www.chacha.com/question/why-do-tomato-plant...
It probably has aphids or another insect which is sucking the plant juices out through the leaves. Uncurl one of the leaves and look carefully for tiny insects. If you see them, spray
http://wiki.answers.com/Q/Why_are_the_Leaves_of_my...
Excessive fertilizing, especially with a high nitrogen fertilizer such as standard Miracle-Gro, can cause the type of symptoms you have described. The high nitrogen levels can adversely
http://en.allexperts.com/q/Growing-Vegetables-740/...
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