Hi there, I've posted a link in your post about hydrangeas that may help you out with your zinnias. :-D
In Texas I sow Zennia seed all over the place and they care for themselves.The easiest plant I ever had and they bloom and bloom.
I find that my Zinnia's are the happiest when I ignore them! Too much water or fertilizer and they rebel by not producing blooms.
Glenda knows her zinnias!!! She has sent me seeds and they are wonderful!!! I think they are about the neatest annual you can get! Deanna :-D
zinnia's are my bag toooooooooooooo. Yep best way to take care of zinnia's is dont..ha ha I have the spider ones as well as the regulars and I am so impressed with the beautiful colors... Never be without zinnias... the are in the full sun.....Water when needed is all I do.....hoe. barb
Zinnias are easy to grow and produces colorful flowers. Here's a link on how to grow them better. http://www.gardenersnet.com/flower/zinnia.htm