Arizona Milkweed

Asclepias angustifolia

Cold hardy perennial found in canyons, arroyos and along stream beds; found only in Arizona.

Arizona is host to about 30 species of milkweeds (Asclepias) ranging from low desert to riparian corridors to grasslands and all the way up into pine forest zones.

Pay attention to where you’re buying a milkweed plant – large volume chain stores and some smaller nurseries treat plants with long lasting insecticides that can harm pollinators. Expect to see some aphids on milkweed plants most of the time; the absence of aphids may be an indicator that the plant has been treated with pesticides. If in question, ask the staff, although they may not be able to answer with certainty.

Aphids are not harmful to the plant and you should expect them on milkweeds in your garden. They also provide a food source for predators and a true ecological balance can only be achieved if you let nature balance the equation.

Flowers: J F M A M J J A S O N D
Status: Native
Origin: Riparian woodlands, mountains, and canyons in Arizona between 3500-7500 ft
Family: Asclepiadaceae (Milkweed Family)
Size: 2′ tall and wide
Sun: Sun to part shade
Watering: Moderate
Growth Rate: Moderate
Soil: Clay or silty
Temperature: Sensitive below 20 degrees F
Pruning:
Disease and Pests: Oleander Aphids
Uses: Nectar plant. Host for Queen and Monarch butterflies. Special value to native bees.
Notes: Performs best in partial shade in the low desert

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