Use a low nitrogen till you start getting small tomatoes then put in
some high nitrogen. Now what kind of tomatoes are you planting. Patio
tomatoes are determinant which means they will set the fruit and quit. I
would pant First Lady II or Champion or Sunsugar. Water when you see the
leaves start to drop a little. Don't put fertilizer on the leaves and
water the roots not the leaves.
From Mel & Donnie in Bluebird Valley
http://community.webtv.net/MelKelly/TheKids