Hi Pavani - I'll try to answer a couple of your questions.

i am afraid that they can't withstand the heat without watering at least alternate days. Should i water alternate days? or should i water very deep like 5-10 minutes each plant twice a week?

Water isn't really what allows them to withstand the heat. It is the soil temps around the roots. So yes, definitely mulch the plants heavily. It will help retain moisture and keep the roots cooler. I use about 6-8" of hay. Straw is great too and it will also help with the too shallow planting. Next year plant them to just below the lowest set of leaves. You might also think about making some sort of sun screen or temporary shade to keep them from cooking on the vine in the hot Houston July sun. It could help from what many of the other Texas growers say.

As to watering, deeper and less often is best but I don't think 5-10 minutes is all that deep - go longer 2x a week. It all depends on how you are applying it. The best clue as to their need is stick your finger as deep as possible into the soil near the plant. If it is at all damp, don't water. When in doubt, don't water. Tomatoes will tolerate being too dry much better than they will if too wet.

BIG GREEN?BROWNISH WORM Big green is usually hornworms - you can find pics of them on the web. Brown is usually tomato fruit worms. Pics of them also available. The hornworms eat the fruit and leaves. The brown just the fruit. Can't tell you which it is without seeing it but you need to pin down which they are.

Most of us just hand pick them off - that is the most organic method. With only a few plants that shouldn't be a problems. Otherwise, Bt (bacillus thuringesis) sold as Dipel (dust or liquid) will control both. It too is approved for organic use.

i pinched/cut off some of the smaller branches from all the plants so that they won't be crowded and do get enough air circulation which might prevent fungs diseases. Did i do the right thing?

That's fine. You can remove leaf branches below and around the bloom clusters with no problem. Check out the FAQ's here on pruning (FAQ link on the forum from page). But get too carried away or the Texas sun will scald the fruit as they develop. Keep some leaf shade over them.

Should i be fertilizing the tomatoes bi-weekly throughout the season?

You'll get many different opinions on this one. ;) Some do but I think I am safe in saying that most do not. Too much fertilizer causes problems. All I can tell you is what I do. I feed well when I plant with a good time-released dry fertilizer mixed in the planting hole. Then again mid-season after we pick the first ripe fruit I do a good root drench feeding. Depending on the weather, one more time around mid-August I feed the roots so the plants will keep going till frost. In between times I will do some foliar feeding sprays with very weak compost tea.

Experiment a bit on your plants and see which works best for you.

Hope this helps. Enjoy your tomatoes.

Dave