Hartweg's checkerbloom
Sidalcea hartwegii
Last reviewed: August 2026
Toxicity unknown
Hartweg's checkerbloom (Sidalcea hartwegii) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
8"–24" H × 8"–12" W
Bloom
Apr, May, Jun
Native to
CA
Pollinators
bees
Before you buy
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An upright annual with rounded, lobed leaves and open spikes of pink cup-shaped flowers in spring. It grows scattered through open grassland and completes its cycle before summer drought.
Wildlife value
Host plant for West Coast lady.
As a member of the mallow family it serves as a larval host for the West Coast lady butterfly, and its flowers feed native bees.
Common questions
- How much sun does Hartweg's checkerbloom need?
- Hartweg's checkerbloom grows best in full sun conditions.
- When does Hartweg's checkerbloom bloom?
- Hartweg's checkerbloom blooms in April, May, and June.
- Where is Hartweg's checkerbloom native?
- Hartweg's checkerbloom (Sidalcea hartwegii) is native to CA, per vouchered herbarium specimen records and regional native plant society lists.
- What butterflies or moths does Hartweg's checkerbloom host?
- Hartweg's checkerbloom is a larval host plant for West Coast lady.
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 Hartweg's checkerbloom? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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