Rotate your tomato plants and do not put them in the same place each year. Try growing them in 5-gallon buckets instead. Q. My climbing tomatoes are splitting and the leaves are brown and dry even though I water every day. You probably watered them too much. Excess water also ruins the flavor and causes fertilizer to leach past plant roots before the plants can use it.
Brown leaves are symptomatic of various fungal and root rot diseases.
Water your plants in the morning only once every three to four days after they are established. Q. My tomato plants have white wiggle marks in the leaves . You have leaf miners, which are more of a nuisance that anything else. They do not affect the fruit and only make the leaves unsightly. A systemic product would do them in, but also will affect the fruit to some degree.