Hi, I have 5 - 18" sq. box planters around my pool. They are in intense sun from late morning on. I want to grow some bright colored flowers that would be about 1 1/2 to 2 feet high, or even taller. Would zinnias be good? How about some type of daisy? I'd like a very full and bright look. I don't want a leggy or straggly look. Annuals or something I could winter in my basement would be good. Reds, pinks, yellows, whites, purples would look great. Thanks!