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Pine-Needle Milkweed

Asclepias linaria

Details & Attributes


Plant Type(s) Perennial
Native to Arizona Yes!
Water Needs Low
Sun Full sun, partial shade
Pollinators Butterflies
Has Spines No
Size
In relative feet, width by height
5 × 4
Freeze Tolerant No
Flowering Season February-December
Flower Color White
Minimum Temperature Range 10-15 °F (will defoliate around 25 °F)
Leaf Description Pine-needle like
Fruit A dry capsule that stays on the stalk. Seeds are windborne on cottony plumes.
Longevity
In years
5
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Elevation Range 1000-6000 ft.
Description Asclepia linaria is a tough milkweed that performs best with very good drainage. This species can produce abundant stems with dense, evergreen foliage. Of the 32 milkweed species in Arizona this one contains the highest levels of cardiac glycosides, which are the chemicals that deter insect grazing on milkweed plant. Although Monarch and Queen caterpillars can these chemicals to a large degree, the high concentrations in this plant make it less effective as a larval food source for these butterflies, though still a very good nectar source.