Photo by Melody
It's time now to VOTE in our 14th annual photo contest! Voting ends November 7, so be sure to cast your votes for your favorites in each category here. Good luck to all contestants!

PlantFiles: Starry Rosinweed
Silphium asteriscus

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Silphium (SIL-phee-um) (Info)
Species: asteriscus (ass-ter-IS-kus) (Info)

2 vendors have this plant for sale.


36-48 in. (90-120 cm)

Unknown - Tell us

USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; sow indoors before last frost

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By redzone911
Thumbnail #1 of Silphium asteriscus by redzone911

By redzone911
Thumbnail #2 of Silphium asteriscus by redzone911

By Floridian
Thumbnail #3 of Silphium asteriscus by Floridian


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral kbjanet2003 On Sep 19, 2013, kbjanet2003 from mid-Michigan, MI wrote:

I grew this plant easily from some seed given to me. I do not know how old the seed was. I sowed it in spring indoors and by August I had 4 to 5 foot plants. Easy to germinate and grow. Since I am in zone 5 I am not sure it will be winter hardy.

Neutral GGT51 On Jun 25, 2013, GGT51 from Crystal River, FL wrote:

One day the plant was beautiful and full of blooms and about 4' tall. The next day it was dying. Anyone know what could cause this? I pulled up the plant and didn't see anything wrong with the roots.


This plant has been said to grow in the following regions:

Gainesville, Florida
Largo, Florida
Lutz, Florida
Ocala, Florida
Odessa, Florida
Oldsmar, Florida
Saint Petersburg, Florida

We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2014 Dave's Garden, an Internet Brands company. All Rights Reserved.

Hope for America