How much sun does Island alumroot need?

Island alumroot grows best in part shade conditions.

When does Island alumroot bloom?

Island alumroot blooms in March, April, and May.

Where is Island alumroot native?

Island alumroot (Heuchera maxima) is native to CA, per the World Checklist of Vascular Plants (Kew).

What pollinators does Island alumroot attract?

Island alumroot draws hummingbirds and bees.

Island alumroot

Name: Pollinator Patch
Author: Pollinator Patch

Heuchera maxima

Last reviewed: September 2026

Island alumroot (Heuchera maxima) is a perennial forb native to CA. It blooms in March, April, and May. The flowers draw hummingbirds and bees.

Toxicity unknown

Island alumroot (Heuchera maxima) 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

part shade

Water

low

Size

12"–36" H × 18"–30" W

Bloom

Mar, Apr, May

Native to

Pollinators

hummingbirds, bees

Before you buy

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Browse plants for this ecoregion

Southern California/Northern Baja Coast

A large, clump-forming evergreen perennial with rounded, scalloped leaves and tall wiry stalks of small pink to cream flowers. Neat mounding habit that holds its shape year round on rocky coastal bluffs and canyon slopes.

Growing Island alumroot

Grow Island alumroot in part shade and low water. Mature plants reach 12 to 36 inches tall and spread 18 to 30 inches wide.

Wildlife value

Tubular flowers are a favorite nectar source for hummingbirds, and bees also visit the blooms.

Common questions

How much sun does Island alumroot need?: Island alumroot grows best in part shade conditions.
When does Island alumroot bloom?: Island alumroot blooms in March, April, and May.
Where is Island alumroot native?: Island alumroot (Heuchera maxima) is native to CA, per the World Checklist of Vascular Plants (Kew).
What pollinators does Island alumroot attract?: Island alumroot draws hummingbirds and 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.

See all plant problem guides

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