Why do annuals that require 6+ hours of sunlight always croak?

I have four hand rail planters that receive the morning to mid-day sun. I purchase annuals from Lowe's and always look for the ones that require 6+ hours of sun. I plant them and fertilize them and keep them moist as stated on the plastic tab. After about 1 week they seem to be fried. Very wilted and dying. What am I doing that is causing everything I try to shrivel up and die? My location is in Beaufort, SC.
Thanks for any help that you can give.
Thames Williams

  5 answers
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