groundcoverN. America Native

American Cranberry

The Story

Plant Bio

Vaccinium macrocarpon, the American cranberry, is a low-growing, mat-forming evergreen dwarf shrub native to the bogs and wet soils of eastern and central North America. It produces slender, trailing runners that root as they spread, clothed in small, glossy green leaves that turn bronze-red in winter.

The species is distinguished by its nodding, pale pink flowers with deeply reflexed petals resembling a crane's head, which give way to large, tart red berries in fall. Its shallow, fibrous root system relies on highly acidic, organic substrates to thrive.

Uses & Benefits:

Provides a dense, fine-textured evergreen groundcover that turns a rich bronze-red or purple in winter.

Produces edible, tart red berries rich in vitamin C that are ideal for culinary processing and preserves.

Attracts specialized native ground-nesting bees, including bumble bees, which perform essential buzz pollination.

Essentials

At a Glance

Plant Type

Groundcover

Height

Width

78"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7

Water

High

Humidity

Moderate to high

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic

Bloom period

Spring – Early summer

In flower about 4 months of the year

Planting

How to Grow

Select a site in full sun with a dedicated bed of pure peat moss, sand, or highly organic acidic muck.
Amend the planting area to ensure a strict pH range between 4.0 and 5.5.
Install plants 12 to 18 inches apart, burying the root ball just beneath the surface.
Maintain continuous moisture through regular irrigation, ensuring the soil never dries out.

Pro Tip

Irrigate exclusively with rainwater or acidified water; alkaline municipal tap water will rapidly buffer the soil pH upward, triggering iron chlorosis and plant decline.

Keep It Thriving

Care Guide

Do

Water regularly to keep the shallow root zone consistently moist.
Mulch with a thin layer of clean sand every few years to encourage runner rooting.
Feed sparingly in spring with an acidifying fertilizer designed for Ericaceae.

Don't

Do not allow the soil to dry out even briefly, as the shallow roots lack drought tolerance.
Do not apply heavy chemical fertilizers, which easily burn the sensitive root system.
Do not plant in standard garden loam or alkaline soils.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Pest Check
Prune
Winter Prep

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bog gardensEdible groundcoversAcidic rain gardensMoist border edgings

Companion Plants

Rhododendron canadense Sarracenia purpurea

Multiply

Propagation Methods

Good to Know

Common Questions

American Cranberry questions

What zones can American Cranberry grow in?

American Cranberry is hardy in USDA Zones 4–7. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is American Cranberry deer resistant?

Not reliably. Deer may browse American Cranberry, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does American Cranberry bloom?

American Cranberry typically blooms in spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does American Cranberry need full sun?

American Cranberry does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.