Hill morning glory
Calystegia subacaulis
Last reviewed: August 2026
Toxicity unknown
Hill morning glory (Calystegia subacaulis) 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
4"–10" H × 12"–24" W
Bloom
Mar, Apr, May
Native to
CA
Pollinators
bees
Before you buy
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A low, mostly stemless morning glory relative with arrow-shaped leaves close to the ground and large funnel-shaped white to pale lavender flowers in spring. Its sprawling habit reads as informal rather than tidy.
Wildlife value
The large spring flowers are an important early nectar source for native bees in open grassland.
Common questions
- How much sun does Hill morning glory need?
- Hill morning glory grows best in full sun conditions.
- When does Hill morning glory bloom?
- Hill morning glory blooms in March, April, and May.
- Where is Hill morning glory native?
- Hill morning glory (Calystegia subacaulis) is native to CA, per the World Checklist of Vascular Plants (Kew).
- What pollinators does Hill morning glory attract?
- Hill morning glory 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 Hill morning glory? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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