Spiny Milkvetch
Astragalus kentrophyta
Last reviewed: September 2026
Spiny Milkvetch (Astragalus kentrophyta) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
4"–12" H × 6"–18" W
Bloom
May, Jun, Jul
Native to
AZ, CA, CO, ID and 10 more states
Pollinators
bees
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.
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Spiny milkvetch is a low-growing perennial wildflower that forms compact cushions of small leaves and produces clusters of purple or white pea-like flowers from May through July. This drought-tolerant native thrives in full sun and requires minimal water once established. The plant maintains a neat, compact growth habit that works well in rock gardens and xeriscaped areas.
In an HOA neighborhood
Spiny Milkvetch takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Has spiny stems that may appear unkempt
- Common name includes 'weed' which raises HOA concerns
- Very wild appearance unsuitable for formal landscapes
Wildlife value
The flowers attract native bees and other pollinators during its extended blooming period. This plant provides important nectar sources for beneficial insects in dry landscape settings.
Common questions
- How much sun does Spiny Milkvetch need?
- Spiny Milkvetch grows best in full sun conditions.
- When does Spiny Milkvetch bloom?
- Spiny Milkvetch blooms in May, June, and July.
- Where is Spiny Milkvetch native?
- Spiny Milkvetch (Astragalus kentrophyta) is native to AZ, CA, CO, ID and 10 more states, per vouchered herbarium specimen records and regional native plant society lists.
- Is Spiny Milkvetch toxic to dogs?
- Spiny Milkvetch is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Spiny Milkvetch toxic to cats?
- Spiny Milkvetch is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- What pollinators does Spiny Milkvetch attract?
- Spiny Milkvetch draws bees.
- Is Spiny Milkvetch HOA-friendly?
- Spiny Milkvetch takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow Spiny Milkvetch? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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