I planted the annual cosmos from a seed packet and I was wondering when I can gather seeds from it to plant for next year? I've never gathered my own seeds before. How will I know? What will I be looking for? Any advice would be great!
I bought a bunch of these seeds from someone who sells them on this website. I planted a bunch this spring and I'm noticing a lot of growth. I just can't tell if they will become large enough to flower in the summer.
Also, I would like to know what is the best way to "keep" the seeds I didn't use all of them this spring. Refrigerate?