So I posted about two months ago about growing sunflowers the coast. Ok, I churned up some misc. dirt stuff, bark chips, pine needles in with the sand that turned into my garden area. Threw on about 3 inches of potting soil, and planted a bunch of sunflower seeds, radishes seeds, and jalepeno seeds. The radishes and sunflowers are taking off like crazy, growing almost too fast I think. Is there anything a guy can do to ensure that the sunflowers will keep on trucking? Ways to keep them healthy? Recommended sunflower fertilizers/plant food? Not worried about the radishes as those are about to be plucked from the ground.