When to Collect Nasturtium Seeds

I keep going out to the deck to see if my nasturtium seeds are ready to collect. I have been checking for at least the past two weeks. I have noticed that when I bump the plant, the seeds fall, but they are still very green. Like this:

Since it's getting pretty late in the season for me, I googled it and found that nasturtium seeds should be collected when green.  So I went out and shook a few plants and took whatever fell off inside.

From what I understand, these green seeds will turn brown in a week or so and be ready to save for next year.  Do any of you have any experience saving these seeds?

I also removed some of the orange Cosmo seeds to save for next year.  These seeds were brown, like I expect seeds that are ready to save, to be.

Last weekend I  bought these three new shrubs: 2 'goldmound' spirea and 1 'Wine & Roses' Weigela.

I plan to plant them together in the rockwall garden as I like the contrast in foliage color.  I buy for foliage color, the blooms (if they happen) will just be a plus.  I have been googling the spirea and I really like what I see. The foliage color  changes from a limey green to red in the fall.  I would like to get about 5 more of these.  Home D. had them on sale for $14.99...great price! They were $24.99.  If you have these, I would love to have a comment telling me how you like them.

I just went out and cut down 4 of the flowers on my new 'Limelight' hydrangea. 

I thought  I would enjoy them more inside as I can only see them in the garden if I look out my bedroom window. The pink color goes very nicely with my living room sofa & love seat. 


Update 6:45p.m.

While I was making dinner, DH went out and bought me 5 more of the 'goldmound'. What a guy!

I know you can only see 4 here. The 5th one is behind the one on the right.