Well, my list is getting longer.
Somehow I forgot about Geraniums for Spring and Summer. Heres an excellent pdf curtesy of Alabama A&M and Auburn on care and maintence.
http://faculty.caes.uga.edu/pthomas/...b/ANR-1106.pdf
According to them, Red is the overwhelmingly preferred color. White the least.
They are easy to care for, and if you dont sell them, just upgrade to a larger pot or basket. If I recall, they overwinter fairly easy, and you can take cuttings easily as well.
The last time I took some to market (couple years ago), they sold like hot cakes, in 4 inch pots (if I recall). I believe $5 each? I only had an 8 count or 12 count tray? I bought them on a whim from my wholesaler. I swiped a few out of the tray to plant in our Mailbox Planter.
I know last year a vendor had baskets, that sold VERY well.