Standard Shipping $9.95* Seed Only $3.95

Search Products
Generic filters
Search Products
Generic filters
Cosmos, Rubenza
Cosmos, Rubenza
Cosmos, Rubenza

Cosmos, Rubenza

(3 customer reviews)


Cosmos, Rubenza – 50 Seeds

In stock

Cosmos, Rubenza – 200 Seeds

In stock

Cosmos, 'Rubenza', Cosmos bipinnatus - 50 or 200 seeds avg

Large blooms in dreamy shades of cranberry, ruby-red, and rose. Easy to grow.

Planting Tips:
  • A warm-season annual that prefers full sun.
  • Plant after danger of frost and once soil has warmed.
  • Start seeds indoors 4-6 weeks before planting date or cast seeds directly in the garden, spacing 8-12".
  • Cover seed with soil; allow 5-10 days to germinate.
  • Grows to 36-48” tall.
  • Pinch when 8" tall to establish a more robust, branching plant.
  • 85-100 days to bloom.
Harvesting Tips:
  • Cosmos make an excellent cut flower when harvested just as they crack open.
  • Make the cut at the base of the stem to encourage regrowth.


3 reviews for Cosmos, Rubenza

  1. Lisa F

    Extremely pleased w/ first time seed starting cosmos, first time soil blocking. These and 4 other types of cosmos from TGW sprouted in 24 hrs on a heat mat. I was giddy w excitment. Mid-late July planting out. I may not get any blooms, perhaps a few. For all the firsts, and keeping them alive to get to plant out, I consider it all success. I have enjoyed the new experience of L.M.Z’s process of growing flowers. Thanks TGW.

  2. Beth

    First time growing Cosmos. I love them but I didn’t plant enough.

  3. Robyn W. (verified owner)

    Growing nicely but hasn’t bloomed yet. Will keep you posted.

Add a review

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.