Astrophytum Species, Sand Dollar, Sea Urchin Cactus, Silver Dollar Cactus, Texas Star

Astrophytumasterias

Family
Cactaceae (kak-TAY-see-ee)
Genus
Astrophytum (ass-troh-FY-tum)
Species
asterias (ass-TEER-ee-as)
Synonym
Echinocactus asterias
Astrophytum asterias var. asterias
Sun Exposure
Sun to Partial Shade
Height
6-12 in. (15-30 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
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)
USDA Zone 11: above 4.5 °C (40 °F)
Bloom Color
Pale Yellow
Bloom Time
Mid Summer
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Suitable for growing in containers
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
From seed; sow indoors before last frost
By grafting
Seed Collecting
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Properly cleaned, seed can be successfully stored
Regional

This plant is said to grow outdoors in the following regions:

Carefree, Arizona

Queen Creek, Arizona

Tucson, Arizona

Reseda, California

Chicago, Illinois

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Gardener's Notes:

3
positives
1
neutral
0
negative
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F
Josephine, Arlington, TX (Zone 8a) | December 2006 | positive

Silver Dollar Cactus, Texas Star Cactus Astrophytum asterias is Endemic to Texas and is now classified as an Endangered plant.

C
(Zone 10b) | November 2005 | positive

A fair contstant plant in cultivation;noticeable raised ribs usually indicate a hybrid with A.capricorne.

S
Oklahoma City, OK (Zone 7a) | November 2004 | neutral

It is a low growing plant and is 3-4" in diameter. It does not have spines. The yellow flower is about 2 inches. The larger white tufts...Read More

P
Fremont, CA (Zone 9a) | March 2004 | positive

A cactus without thorns, my kinda cactus. Identified as an endandered species on 10/18/93 with a recovery plan written in August, 2003

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