growing sunflowers - need advice
Hi, I finally have enough sunlight and extra space to try some annual sunflowers this year. I have both the native kind and a couple of packs of hybrids that are about 5-6 feet tall. Anyhow, I've never grown them before and am wondering--how long does it take for them to flower and do they flower throughout the summer or do they poop out in the heat? How long do the flowers last? I was thinking I could sow some now and then more a month later so that I could have more than just a brief show.... does anyone do that?