Clustered tarweed
Deinandra fasciculata
Last reviewed: September 2026
Clustered tarweed (Deinandra fasciculata) is a annual forb native to CA. It blooms in May, June, July, and August. The flowers draw bees.
Toxicity unknown
Clustered tarweed (Deinandra fasciculata) 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 × 6"–12" W
Bloom
May, Jun, Jul, Aug
Native to
CA
Pollinators
bees
Before you buy
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A sticky, aromatic annual wildflower with narrow leaves and small yellow daisy-like flowers that blooms through the dry summer when little else is flowering.
Growing Clustered tarweed
Grow Clustered tarweed in full sun and low water. Mature plants reach 8 to 24 inches tall and spread 6 to 12 inches wide.
Wildlife value
An important late-season nectar source for native bees when most other wildflowers have finished blooming.
Common questions
- How much sun does Clustered tarweed need?
- Clustered tarweed grows best in full sun conditions.
- When does Clustered tarweed bloom?
- Clustered tarweed blooms in May, June, July, and August.
- Where is Clustered tarweed native?
- Clustered tarweed (Deinandra fasciculata) is native to CA, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Clustered tarweed attract?
- Clustered tarweed draws bees.
Native range data from the World Checklist of Vascular Plants (Kew). 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 Clustered tarweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.