Giant coreopsis
Leptosyne gigantea
Last reviewed: September 2026
Toxicity unknown
Giant coreopsis (Leptosyne gigantea) 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
36"–96" H × 36"–72" W
Bloom
Feb, Mar, Apr
Native to
CA
Pollinators
bees
Before you buy
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A dramatic, sculptural shrub with a thick, woody, sparsely branched trunk topped by tufts of ferny leaves and large bright yellow daisy flowers in late winter and spring. It drops its leaves and appears bare during summer dry dormancy.
Wildlife value
Its late-winter flowers are an early nectar source for native bees on exposed coastal bluffs.
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, and April.
- Where is Giant coreopsis native?
- Giant coreopsis (Leptosyne gigantea) is native to CA, per vouchered herbarium specimen records and regional native plant society lists.
- What pollinators does Giant coreopsis attract?
- Giant coreopsis draws bees.
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 Giant coreopsis? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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