Giant coreopsis
Coreopsis gigantea
Last reviewed: September 2026
Giant coreopsis (Coreopsis gigantea) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org (opens in new tab), last reviewed 2026-08-15). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
low
Size
72"–120" H × 24"–48" W
Bloom
Feb, Mar, Apr, May
Native to
CA
Pollinators
bees, butterflies
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Unusual succulent-stemmed shrub with a thick woody trunk topped by a rounded crown of fleshy leaves and bright yellow daisy flowers in late winter and spring. Drops its leaves and goes dormant through the dry season on coastal bluffs.
Wildlife value
Spring flowers attract native bees and butterflies.
Common questions
- How much sun does Giant coreopsis need?
- Giant coreopsis grows best in full sun conditions.
- When does Giant coreopsis bloom?
- Giant coreopsis blooms in February, March, April, and May.
- Where is Giant coreopsis native?
- Giant coreopsis (Coreopsis gigantea) is native to CA, per the World Checklist of Vascular Plants (Kew).
- Is Giant coreopsis toxic to dogs?
- Giant coreopsis is not on the ASPCA Animal Poison Control Center toxic plant list for dogs (aspca.org).
- Is Giant coreopsis toxic to cats?
- Giant coreopsis is not on the ASPCA Animal Poison Control Center toxic plant list for cats (aspca.org).
- What pollinators does Giant coreopsis attract?
- Giant coreopsis draws bees and butterflies.
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
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