Hi..I have around 20 tomato plants growing both on ground and in pots...all of them are bearing fruits. However I see three issues with some of the plants.
(1) Leaves turning brown even though i give them plenty of water
(2) Whitel lines caused by some bug
(3) Leave although green sometimes seem very weak
can anyone help me out as I have around 50 tomatoes in various stages of fruiting and feel sad they may not realise their full potential due to above reasons
The leaves turning brown can have various causes - could be because of fungus, overfertilization, or simply it's too hot, and there are others, but the ones I mentioned are common - at least to my knowledge. Also, don't water your plants from the top but water only the soil.
Those white lines are leaf miners. You wouldn't want to use insecticides and home-made concoctions don't work on them well. They wouldn't affect the plant big time. Just pluck the leaves off the plant. If the fruits have matured, you bury the stem with those infected leaves in the ground.
Hope that helps... Good luck