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PlantFiles: Pallid Milkweed, Davis' Milkweed, Humboldt Mountains Milkweed, Cow Cabbage
Asclepias cryptoceras

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Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: cryptoceras (krip-toh-KER-as) (Info)

Synonym:Acerates latifolia

3 members have or want this plant for trade.

Category:
Perennials

Height:
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)

Spacing:
24-36 in. (60-90 cm)

Hardiness:
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
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

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Pink
Purple

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Herbaceous
Velvet/Fuzzy-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Non-patented

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive Tokoro On Jul 7, 2006, Tokoro from Sacramento, CA (Zone 9a) wrote:

Growing wild in a huge patch just back from the roadside, under and adjoining a utility tower in Freeport, CA. The blooms smell unbelievable, like lilac, up close! Though this is said to require moist soil, much of the patch (10 x 20 feet or more) is in heavy clay soil that is currently bone dry, at least the top layers -- and this is only July 6 of the Sacramento summer! The flowers are extraordinarily beautiful, but the plant is extremely fragile -- branches break off very readily. I will be harvesting seed to try growing at home. I'm planning to do some research to see if cuttings will root. If I can't find any info, I'll try it.

Regional...

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

Sacramento, California



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