North America Native Plant

Crevice Alumroot

Botanical name: Heuchera micrantha

USDA symbol: HEMI7

Life cycle: perennial

Habit: forb

Native status: Native to Canada âš˜ Native to the lower 48 states  

Crevice Alumroot: A Delicate Native Beauty for Shade Gardens If you’re searching for a charming native perennial that thrives in those tricky shady spots, let me introduce you to crevice alumroot (Heuchera micrantha). This understated beauty might not shout for attention like some flashier garden stars, but it has a ...

Crevice Alumroot: A Delicate Native Beauty for Shade Gardens

If you’re searching for a charming native perennial that thrives in those tricky shady spots, let me introduce you to crevice alumroot (Heuchera micrantha). This understated beauty might not shout for attention like some flashier garden stars, but it has a quiet elegance that makes it absolutely perfect for naturalized woodland settings and shade gardens.

What Makes Crevice Alumroot Special?

Crevice alumroot is a native North American perennial that belongs to the forb family – essentially a non-woody flowering plant that comes back year after year. What sets this particular Heuchera apart is its delicate, almost ethereal appearance. The plant forms attractive clumps of rounded, lobed leaves that create lovely groundcover, while slender stems topped with tiny white flowers dance above the foliage in late spring and early summer.

Where Does It Come From?

This native gem calls the Pacific Northwest and western regions of North America home. You’ll find wild populations growing naturally across British Columbia, California, Idaho, Oregon, and Washington. As a true native species to both Canada and the lower 48 states, it’s perfectly adapted to the climate conditions of these regions.

Why Choose Crevice Alumroot for Your Garden?

There are several compelling reasons to consider adding this native beauty to your landscape:

  • Native plant benefits: Supporting local ecosystems and wildlife
  • Low maintenance: Once established, it’s quite self-sufficient
  • Shade tolerance: Perfect for those challenging shady areas
  • Pollinator support: The small white flowers attract native bees and other beneficial insects
  • Year-round interest: Attractive foliage persists through much of the growing season

Perfect Garden Settings

Crevice alumroot truly shines in several garden styles:

  • Woodland gardens: Naturally complements ferns, wild ginger, and other shade-loving natives
  • Rock gardens: Its compact size and delicate appearance work beautifully among stones
  • Native plant gardens: An authentic choice for regional native plantings
  • Shade perennial borders: Provides textural interest and seasonal flowers

Growing Conditions and Care

The good news is that crevice alumroot isn’t particularly fussy, especially if you can mimic its natural habitat:

  • Light: Partial to full shade (morning sun with afternoon shade is ideal)
  • Soil: Moist but well-draining soil; avoid waterlogged conditions
  • Climate: Hardy in USDA zones 4-8, preferring cooler conditions
  • Moisture: Consistent moisture without being soggy

Planting and Care Tips

Getting your crevice alumroot established is straightforward with these simple guidelines:

  • Best planting time: Spring or fall when temperatures are moderate
  • Soil preparation: Amend heavy clay with compost for better drainage
  • Watering: Keep soil consistently moist, especially during the first growing season
  • Mulching: Apply a thin layer of organic mulch to retain moisture and suppress weeds
  • Maintenance: Remove spent flower stems and any damaged leaves as needed

Supporting Local Wildlife

One of the best reasons to choose native plants like crevice alumroot is their role in supporting local ecosystems. The small white flowers may seem modest, but they’re perfectly sized for native bees and other small pollinators. By choosing native species, you’re helping to maintain the natural relationships between plants and wildlife that have evolved over thousands of years.

Is Crevice Alumroot Right for Your Garden?

If you have shady areas that need gentle, naturalistic plantings, crevice alumroot could be an excellent choice. It’s particularly well-suited for gardeners who appreciate subtle beauty over bold statements and want to support native plant communities. However, if you’re looking for dramatic color or plants that thrive in full sun, you might want to consider other options.

This charming native perennial offers the perfect combination of ecological benefits, low maintenance requirements, and quiet beauty – making it a wonderful addition to shade gardens throughout its native range.

Crevice Alumroot

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rosales

Family

Saxifragaceae Juss. - Saxifrage family

Genus

Heuchera L. - alumroot

Species

Heuchera micrantha Douglas ex Lindl. - crevice alumroot

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA