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

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

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

Regional

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

Sacramento, California

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

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.