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Digitalis Ferruginea

Digitalis ferruginea

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A stately biennial or short-lived perennial bearing tall spikes of small, rust-brown and yellow tubular flowers that bloom mid to late summer. It is more heat- and drought-tolerant than common foxglove. Self-seeds readily in suitable conditions.

Digitalis Ferruginea

Common Problems

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Care Guide

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Light
Full sun to partial shade (4–6 hours of sun); tolerates more sun than D. purpurea.
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Water
Moderate watering; once established, fairly drought-tolerant. Water during dry spells and in early growth; reduce after flowering.
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Soil
Well-draining, moderate fertility soil. Tolerates sandy or gravelly soil better than other digitalis. pH 6.0–7.5 acceptable.
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Fertiliser
Light feeding in spring or at planting with balanced fertilizer. Excessive nitrogen reduces flowering; avoid over-fertilizing.
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Temperature
Cool to warm season; hardy to cold. Prefers 60–75 °F. More heat-tolerant than common foxglove.
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Humidity
Moderate humidity; good air circulation essential to prevent fungal disease. Drought-tolerant once established.

Toxicity

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All parts are highly toxic; contains cardiac glycosides. Ingestion causes nausea, vomiting, arrhythmia, and potentially fatal cardiac effects.

Common Diseases

Common Pests

Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Digitalis Ferruginea Care Guide — Digitalis ferruginea | GreenScout