Calgary, Alberta, Canada - Zone 3
-30 C to +30 C (rarely!); elevation ~1130m; annual precipitation ~40 cm
I have managed to grow Physoplexis from seed from the NARGS seedex a few years ago. They remain outdoors and have bloomed nicely for the past two seasons. Looking for advice on how best to collect seed as I would like to contribute some to the exchage.
USDA Z5, Lamoine, ME
There is nothing easy about this. In my climate, they make little green seedpods that remain on the plant all summer long. Then they are gone. I suspect the birds eat them. I suggest that you protect the plants with bird netting or an inverted nursery flat, to keep the birds away. Pull a seed pod off occasionally and see if it has ripe seed in it.
SW Washington state, 600 ft. altitude