annual

Garden Balsam

The Story

Plant Bio

Impatiens balsamina, the garden balsam, is an erect, tender annual herb reaching six to thirty inches in height, characterized by succulent stems and lanceolate, deeply serrated light green leaves. The species produces cup-shaped, spurred flowers in shades of pink, red, purple, and white, which bloom tucked individually or in small clusters within the leaf axils from summer until the first frost.

Unlike modern bedding impatiens that display flat, fully exposed flowers, this species carries its camellia-like double blooms beneath a distinct canopy of pointed foliage. The mature seed pods exhibit explosive dehiscence, bursting open at the slightest touch to fling seeds several feet away.

Uses & Benefits:

Produces colorful, camellia-like double flowers nestled along succulent stems, ideal for cottage borders.

Self-seeds readily, providing reliable annual color year after year without replanting.

Provides nectar for generalist insect pollinators throughout the summer and autumn.

Essentials

At a Glance

Plant Type

Annual

Height

30"

Width

18"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9, 10

Water

Medium

Humidity

Moderate to high

Lifespan

Annual

Native To

South and Southeast Asia

Toxicity

Low-severity toxicity (calcium oxalate)

Bloom period

Summer – Autumn

In flower about 6 months of the year

Planting

How to Grow

Sow seeds indoors six to eight weeks before the last expected frost, or direct-sow outdoors once soil temperatures warm in late spring.
Select a planting site with organically rich, well-draining soil that receives full sun to partial shade, ideally with afternoon shade in hot climates.
Space plants eight to twelve inches apart to ensure adequate air circulation and reduce the risk of fungal leaf diseases.
Water regularly to keep the soil consistently moist, applying mulch around the base to retain moisture without waterlogging the roots.

Pro Tip

Pinch out the growing tips of young plants when they reach four inches tall to force lateral branching, preventing the naturally erect stems from becoming leggy and sparse.

Keep It Thriving

Care Guide

Do

Keep soil evenly moist, as dry soil triggers rapid wilting and reduces flower production.
Pinch back young shoots early in the season to encourage a bushier, more floriferous habit.
Apply a balanced, slow-release fertilizer or compost in spring to support steady growth.

Don't

Do not over-fertilize with high-nitrogen formulas, which stimulate excessive foliage at the expense of flowers.
Do not allow the soil to become waterlogged, as succulent stems are highly prone to rot.
Do not water overhead; wet foliage combined with poor airflow invites powdery mildew.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Pest Check
Pinch
Propagate

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Cottage GardensBordersContainersBedding Displays

Companion Plants

Zinnia angustifolia Celosia argentea Lobelia erinus

Multiply

Propagation Methods

Good to Know

Common Questions

Garden Balsam questions

What zones can Garden Balsam grow in?

Garden Balsam is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Garden Balsam bloom?

Garden Balsam typically blooms in summer through autumn. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Garden Balsam need full sun?

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