On Jun 18, 9:37?am, FragileWarrior
wrote:
Wallflowers set their seeds the same way do: in little tubes that line the
spent flower stalk.

When is a good time to collect the seeds? Can I cut the stalks now and
hang them to dry or do they have to come to a certain state of ripeness
while still on the living stalk?

I was wondering if I should collect them now before it rains today. (At
least I hope it's going to rain today.)

I would wait until flower heads are dried on the plant. I don't
understand what it raining today has to do with anything... I assume
it will stop raining, the sun will appear, and things will dry. Like
other wildflowers wallflower is a plant that reseeds itself. There
should be a fairly large window of time for harvesting seeds and not
all will ripen at the same moment... take seeds in progression as they
dry.