well have a few dwarf lettuce (grow like lillipads). i have put some miracle grow your supposed to put in the water and then poor on the plant... so i just mixed it in with the water it was growing in... it took off... but then i had to change the water, i do every week or so.... it started to look worse but is back to the pre miracle grow stage. been that way for a while... i figure it was just adjusting... i could easily keep the miracle grow in the water supply... should i?