What are you collecting? Here's my list thus far:

Bachelor's button (first year growing them- lovely blue)
Red Pentapetes
Bluebonnets
4 o'clocks
Orlaya grandiflora
Red Flanders poppy
Blackberry lily
Red amaryllis
Asclepias tuberosa

Love-in-a-mist
Holleyhock
Dill

Hoping to harvest some bee balm seeds as well.

So far I have:

cleome
abelmoscheus
rangoon creeper

So far have luv in a mist, rudbeckia, celosia, and yarrow.

So far for me
White, Tea Time Rose, and Limelight 4 o'clocks
Ipomoea lobata
Ipomoea Nil Star of India
Ipomoea coccinea pumpkin
Canna Picasso
Canna Cannova orange

I've been collecting the seeds off my Black Eyed Susan vines, it's pretty hard to get them before they pop .~. But so far I have like 200 seeds

2nd year volunteer orange double marigolds and 1st year tall salvias (rough leaves but tall sturdy flowers)...

In fact, the year was bad for flowers here and these are all volunteers (well not the venus fly traps. Those were divisions from last year)!