Contact Us Host an Event Volunteer Join

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
1 rating

Monday - July 21, 2014

From: Terlingua, TX
Region: Southwest
Topic: Seeds and Seeding, Wildflowers
Title: Preparation of seeds of Cosmos parviflorus for planting
Answered by: Nan Hampton

QUESTION:

This is in regards to Cosmos Parviflorus. I reside directly outside of Big Bend National Park in Terlingua, TX. Cosmos Parviflorus grows naturally here and I have collected some seeds from a couple of them. Do you have any information on whether the seeds require a period of stratification or scarification? Thank you

ANSWER:

Cosmos parviflorus (Southwestern cosmos) is a beautiful plant.  I found two commercial seed companies that carry the seeds, B & T World Seeds and Western Native Seed and a gardening blog, Auntie Dogma's Garden Spot, with information about germinating Cosmos seeds.  None of the three sites suggest any pre-treatment for the seeds.

 

 

From the Image Gallery


Southwestern cosmos
Cosmos parviflorus

More Seeds and Seeding Questions

Transplanting and germination of Pride of Barbados in Adkins, TX
April 02, 2012 - What is the root system like of the Pride of Barbados? I have a lot of new plants coming up in my beds from seeds. Can these be transplanted to a new location easily without damaging the plants? If...
view the full question and answer

Finding a source of Straggler daisy
October 14, 2015 - I've decided on Straggler daisy but am having trouble finding it. It would be perfect for me. Do I have to wait until next Spring for it to show up? Can it be ordered through a nursery or a landscape...
view the full question and answer

Why Did Gaillardia and Aquilegia Changed Color?
June 26, 2013 - Both a Gaillardia pulchella and two red columbines bloomed normally last summer, but this summer the Gaillardia's petals are all yellow and one columbine is white and the other is yellow. What caused...
view the full question and answer

Growing a Swamp Oak from Seed
July 02, 2014 - I have a swamp oak that I started from an acorn. Someone at a nursery stated that after 4 years I should cut it off at ground level and then allow one of the suckers to grow while keep removing the ot...
view the full question and answer

Spring sowing of wildflower seeds in pots
May 11, 2015 - Is it possible to start wildflower seeds in pots in the spring and then transplant them to the yard?
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.