I had a client who grew beautiful Zinnias last year. So I decided to try some myself for the first time. Back in Feb I bought 4 packs of different Zinnia seeds. In March I sowed them in 4" pots because I was afraid they'd get lost if sowed directly in the garden. They got to be about 3" tall in a month, tall enough to plant in the garden. Now in June the taller growing varieties are 2' tall and gorgeous! I look forward to many more flowers throughout the summer.
I never had good luck with seeds before. What a difference some ground makes!