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PlantFiles: Star Cactus
Haworthia retusa

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Family: Aloaceae
Genus: Haworthia (ha-WORTH-ee-a) (Info)
Species: retusa (re-TOO-suh) (Info)

Synonym:Haworthia mirabilis subsp. mundula

10 members have or want this plant for trade.

Category:
Alpines and Rock Gardens
Groundcovers
Cactus and Succulents

Height:
under 6 in. (15 cm)

Spacing:
12-15 in. (30-38 cm)

Hardiness:
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)

Sun Exposure:
Sun to Partial Shade
Light Shade
Partial to Full Shade

Danger:
Unknown - Tell us

Bloom Color:
White/Near White
Cream/Tan

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

Foliage:
Grown for foliage
Shiny/Glossy-Textured
Succulent

Other details:
Drought-tolerant; suitable for xeriscaping
Suitable for growing in containers

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:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From leaf cuttings
Allow cut surface to callous over before planting
From seed; direct sow after last frost
From seed; germinate in vitro in gelatin, agar or other medium

Seed Collecting:
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

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to view:

By Happenstance
Thumbnail #1 of Haworthia retusa by Happenstance

By palmbob
Thumbnail #2 of Haworthia retusa by palmbob

By palmbob
Thumbnail #3 of Haworthia retusa by palmbob

By cactus_lover
Thumbnail #4 of Haworthia retusa by cactus_lover

By palmbob
Thumbnail #5 of Haworthia retusa by palmbob

By Xenomorf
Thumbnail #6 of Haworthia retusa by Xenomorf

By Calif_Sue
Thumbnail #7 of Haworthia retusa by Calif_Sue

There are a total of 12 photos.
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Profile:

3 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive mgeno On Apr 19, 2010, mgeno from Philadelphia, PA wrote:

I have enjoyed this plant knowing very little about it. It's content to grow with regular weekly and semi weekly waterings in a bright sunny window.

I like these bursting out of a pot, root-bound.
They're easy to propagate.

Positive palmbob On Sep 25, 2004, palmbob from Acton, CA (Zone 8b) wrote:

One of the more common species in cultivation, and a pretty easy grower as long as you keep it out of hot sun and don't rot it by overwatering it. Does tend to get a bit frost damaged down in the mid 20s, but survives and have had them outdoors for years in zone 9b... not sure it that means it's a 9b plant.. probably would be happier warmer. This species is known for it's transluscent bent, fat, pointed lime green leaves and ability to form huge clumps. Excellent pot plant.

Positive Happenstance On Aug 23, 2003, Happenstance from Northern California, CA wrote:

Native of the Cape Province of South Africa.

Easy to grow, lots of off-sets that can be potted seperately, but I just leave it as a massive clump.

Regional...

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

Grenoble,
Phoenix, Arizona
Brea, California
Los Angeles, California
Paradise, California
Pleasant Hill, California
Thousand Oaks, California
Millersview, Texas



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