Posted: 11/06/2013 at 18:55
Dotty, what sort of soil are they planted in? Commercial potting mix? It sounds very odd that the soil is dry and sandy when it's being watered every day.
Like BB, I'd like to know the dimensions of the trough, too.
Have a look at the Miracle Grow pack. You'll see figures for N, P and K. That's Nitrogen, Phosphorous and the K stands for Potassium. What are the numbers on the pack? They're the key figures to look at in fertilisers for toms.
For toms, the N figure should be low, the P and K figures substantially higher.