How much sun does Klamath plum need?

Klamath plum grows best in full sun conditions.

When does Klamath plum bloom?

Klamath plum blooms in March and April.

Where is Klamath plum native?

Klamath plum (Prunus subcordata) is native to CA, OR, per vouchered herbarium specimen records and regional native plant society lists.

Is Klamath plum toxic to dogs?

Yes. Klamath plum is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

Is Klamath plum toxic to cats?

Yes. Klamath plum is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.

What butterflies or moths does Klamath plum host?

Klamath plum is a larval host plant for eastern tiger swallowtail.

Klamath plum

Name: Pollinator Patch
Author: Pollinator Patch

Prunus subcordata

Last reviewed: September 2026

Klamath plum is toxic to dogs and cats.

Listed as toxic by the ASPCA Animal Poison Control Center (opens in new tab) (last reviewed 2026-08-15). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435and your veterinarian's emergency line.

Pollinator Patch flags toxic plants so you can choose a pet-safe native alternative for your yard.

Light

full sun

Water

medium

Size

96"–240" H × 96"–180" W

Bloom

Mar, Apr

Native to

CA, OR

Pollinators

bees

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Browse plants for this ecoregion

Coast Range Northwestern Forested Mountains Sierra Nevada Central California Foothills and Coastal Mountains North American Deserts

A large thicket-forming shrub or small tree with clusters of white flowers in early spring before the leaves. Small red to purple plum-like fruit follows in late summer and is valued by wildlife.

Wildlife value

Host plant for eastern tiger swallowtail.

Spring flowers feed bees, the fruit feeds birds and mammals, and the foliage hosts eastern tiger swallowtail caterpillars.

Common questions

How much sun does Klamath plum need?: Klamath plum grows best in full sun conditions.
When does Klamath plum bloom?: Klamath plum blooms in March and April.
Where is Klamath plum native?: Klamath plum (Prunus subcordata) is native to CA, OR, per vouchered herbarium specimen records and regional native plant society lists.
Is Klamath plum toxic to dogs?: Yes. Klamath plum is listed as toxic to dogs by the ASPCA Animal Poison Control Center (aspca.org). If your pet has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
Is Klamath plum toxic to cats?: Yes. Klamath plum is listed as toxic to cats by the ASPCA Animal Poison Control Center (aspca.org). If your cat has been exposed, call the ASPCA Animal Poison Control Center at (888) 426-4435.
What butterflies or moths does Klamath plum host?: Klamath plum is a larval host plant for eastern tiger swallowtail.

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.

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