keeping potted sunflowers looking good ??

greenpassion(z4-z5 VT)August 18, 2009

I have several potted sunflowers on my deck, and every summer, usually around august, they begin to develope yellowing wilted leaves. I have fed them DAILY this summer and it has helped, but it looks as though I may loose the battle here. Is there a specific food for them? I have a mix of iron and nitrogen that I use in conjunction with a water soluble food. Any ideas?

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