perennial RHS Award

Rusty Foxglove

The Story

Plant Bio

Digitalis ferruginea, commonly known as rusty foxglove, is a short-lived perennial, often grown as a biennial, known for its tall, elegant spikes of tubular flowers.

This species is distinguished by its rusty-colored, spotted flowers, which are less common among other foxglove species.

Uses & Benefits:

Digitalis ferruginea adds height and elegance to shaded borders with its tall, striking flower spikes and rust-colored blooms.

Its attractive appearance can serve as a natural screen or background plant, reducing the need for additional garden accents.

Supports pollinators like bees and hummingbirds, contributing to local biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

54 inches

Width

21 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Mediterranean region

Toxicity

Yes

Planting

How to Grow

Tuck seeds into moist soil in early spring for best germination.
Mist cuttings regularly to maintain humidity and encourage rooting.
Transplant seedlings when they are sturdy and have developed several leaves.
Divide mature plants in early spring or fall to promote healthy growth.
Mulch around the base to retain moisture and suppress weeds.
Fertilize with a balanced, slow-release fertilizer during active growth.

Pro Tip

Use a well-draining, humus-rich soil for optimal growth and flowering.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil evenly moist 🌱
Provide partial shade in hot climates
Apply mulch to conserve moisture and regulate soil temperature
Deadhead spent flowers to encourage more blooms
Fertilize in early spring with a balanced fertilizer

Don't

Avoid overwatering to prevent root rot ❌
Don’t expose to harsh, direct afternoon sun in hot regions
Refrain from disturbing roots during the growing season
Do not prune heavily in late fall or winter

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Spring Cleanup
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Tall, elegant border plantShade garden accentWildflower meadow addition

Companion Plants

Salvia Echinacea RudbeckiaAsters Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

Rusty Foxglove questions

What zones can Rusty Foxglove grow in?

Rusty Foxglove is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Rusty Foxglove deer resistant?

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

When does Rusty Foxglove bloom?

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

Does Rusty Foxglove need full sun?

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