Photo by Melody

PlantFiles: Pineneedle Milkweed, Threadleaf Milkweed
Asclepias linaria

Family: Apocynaceae (a-pos-ih-NAY-see-ee) (Info)
Genus: Asclepias (ass-KLE-pee-us) (Info)
Species: linaria (lin-AR-ee-uh) (Info)

Synonym:Asclepias filiformis
Synonym:Asclepias pinifolia

7 members have or want this plant for trade.


24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

18-24 in. (45-60 cm)

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)

Sun Exposure:
Full Sun
Sun to Partial Shade


Bloom Color:
White/Near White

Bloom Time:
Mid Spring


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall
Direct sow as soon as the ground can be worked
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Properly cleaned, seed can be successfully stored

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1 positive
1 neutral
No negatives

Gardeners' Notes:

Neutral rizard On Apr 10, 2013, rizard from guadalajara
Mexico wrote:

wonderful superb little plant, always when watching asclepias flowers one wonders how does nature manage to come up with such fabulous forms and structures (is there a plant energy-spirit for each species guarding its form and development for this and all other plants as some ancient beleifs attest?). Asclepias linaria has even a very nice perfume. I have seen it growing wild in the mountains of west central Mexico. Its certainly a plant ro revere, worship and cherish for its immaculate beauty.

Positive azreno On Apr 24, 2008, azreno from Mesa, AZ (Zone 9b) wrote:

Had read reports that this will only set seed in the fall, not true, mine are setting seed in the spring this year for the first time.


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

Maricopa, Arizona
Mesa, Arizona
Tucson, Arizona (2 reports)
San Diego, California

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