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

Latest time to mow bluebonnets from Chappell Hill TX
February 13, 2014 - The past few years, my bluebonnets have been overwhelmed by tall grass. I could have solved this by mowing later, but I was always afraid of mowing new bluebonnet plants. When is the latest time I can...
view the full question and answer

Sharing Selfheal with Texas Friends
April 25, 2013 - I have discovered selfheal plants in my yard. When and how do I collect the seeds or do I just dig up plants to share with friends? I understand this is actually an herb. I love identifying wildflower...
view the full question and answer

When is best time to plant seeds of Texas Nightshade in San Antonio, TX?
September 20, 2014 - I need to know the time to plant seeds of Texas Nightshade. Can I plant them now ( August ), or wait till fall or spring?
view the full question and answer

Starting yucca from seed from Austin
December 24, 2012 - I would like to start a soft leaf yucca recurvifolia from seed. Is that possible? Also, I've looked for seed on dried flower stalks, and I'm not sure that what I'm finding is the seed, and I ...
view the full question and answer

Why is fall the best time to plant Bluebonnet seeds?
May 29, 2015 - Bluebonnet plants drop their seeds in late May or early June. Why is it recommended to broadcast Bluebonnet seeds in October which is 5 months after the plant drops its seeds?
view the full question and answer

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