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)

Category:

Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Where to Grow:

Unknown - Tell us

Height:

36-48 in. (90-120 cm)

Spacing:

Unknown - Tell us

Hardiness:

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

Danger:

Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Foliage:

Herbaceous

Other details:

Unknown - Tell us

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

Regional

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

Bokeelia, Florida

Gainesville, Florida

Largo, Florida

Lutz, Florida

Ocala, Florida

Odessa, Florida

Oldsmar, Florida

Saint Petersburg, Florida

show all

Gardeners' Notes:

0
positives
2
neutrals
0
negatives
RatingContent
Neutral

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

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.