6 named cultivars

shrub

Bumald Spirea

The Story

Plant Bio

Spiraea x bumalda is a low mounding deciduous shrub, a hybrid within the Japanese spirea group, reaching two to three feet tall and three to five across. Sharply toothed leaves emerge pinkish-purple, mature dark green and turn coppery in autumn, and flat clusters of small pink flowers open across the top of the shrub through summer.

It flowers on the current season's wood, so cut it back hard in early spring and shear the spent heads afterwards for a second flush. Be aware that its Japanese spirea parentage is listed as invasive in parts of the eastern United States, where it seeds into woodland edges — check your state list, and consider native meadowsweet or steeplebush if it appears there.

Uses & Benefits:

Coloured new growth, flat pink flower clusters through summer and coppery autumn foliage.

Compact, drought tolerant once established and almost impossible to kill by pruning.

Butterflies work the flat flower heads, though its invasive parentage counts against it in some regions.

Essentials

At a Glance

Plant Type

Shrub

Height

30 inches

Width

42 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Low to moderate

Humidity

Moderate

Lifespan

Perennial

Native To

Garden hybrid of Asian species

Toxicity

Non-toxic

Planting

How to Grow

Check local invasive listings before planting.
Plant in full sun for the best flower and leaf colour.
Give it any reasonably drained soil; it is undemanding.
Cut the whole shrub back hard in early spring.
Shear off the spent flower heads for a second flush.
Water in prolonged drought, though it tolerates dry soil.

Pro Tip

Shear the faded flower heads off as soon as they brown and the shrub usually produces a second, lighter flush within a month.

Keep It Thriving

Care Guide

Do

Plant in full sun for the best colour ☀️
Cut back hard in early spring ✂️
Shear spent heads for a rebloom 🌸
Check your state's invasive list first ⚠️

Don't

Plant it where Japanese spirea is listed invasive ❌
Leave it unpruned for years ❌
Grow it in deep shade ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Low informal hedge or edgingMassed planting on a bankFront of a sunny mixed border

Companion Plants

Catmint Coneflower SedumRussian Sage Daylily

Multiply

Propagation Methods

Good to Know

Common Questions

Bumald Spirea questions

What zones can Bumald Spirea grow in?

Bumald Spirea is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Bumald Spirea deer resistant?

Yes — Bumald Spirea is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Bumald Spirea bloom?

Bumald Spirea typically blooms in summer through mid-summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Bumald Spirea need full sun?

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

Is Bumald Spirea drought tolerant?

Yes — once established (usually after the first full season), Bumald Spirea handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.