Foxglove (Lady's Glove) care

Light

Bright but filtered. Foxglove burns within days in unfiltered south-facing summer sun, and stops growing within months in deep shade. Thrives in dappled shade to partial shade, replicating its natural woodland-edge habitat; it tolerates full sun only if the soil stays reliably moist, otherwise the first-year rosette scorches and the plant bolts prematurely. If you only have a south window, set the plant back 1.5 m or hang a sheer curtain — both knock the intensity down into the right range.

Watering

Watering foxglove: regularly — weekly in summer, less in winter. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. Prefers consistently moist soil and wilts noticeably in drought, which weakens the plant and reduces flowering spike height; mulch around the base to conserve moisture.

Soil and pot

Foxglove grows best in moisture-retentive, humus-rich, slightly acidic. Best in woodland-type soil — leafmould or well-rotted compost incorporated to 30 cm depth, pH 5.5–7.0; avoid alkaline chalk or clay that compacts around the roots. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Foxglove sits happiest at around Moderate, 50–70% humidity and -15 to 25°C (5 to 77°F). Well-adapted to the cool, moist summers of western Britain and Ireland; in hot, dry continental climates it struggles — supplemental watering and afternoon shade are essential. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed foxglove sparingly. Mulch with leafmould or garden compost in autumn; a single application of a balanced slow-release fertiliser in spring of the second year supports stem development without producing soft tissue susceptible to powdery mildew. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on foxglove in the Growli community. Each is annotated with the most common cause so you know where to start.

• Powdery mildew on rosette leaves — Warm, dry spells stress the first-year rosette, which is then rapidly colonised by powdery mildew (Erysiphe species); water at the base, mulch well, and remove severely affected leaves.
• Crown rot / failure to overwinter — Wet, cold soil around the crown in winter kills the rosette, especially on heavy clay — plant in well-drained positions and avoid autumn mulching that contacts the crown.
• Aphid infestation on flower spike — Foxglove aphids (Acyrthosiphon cyparissiae) and other species colonise the developing flower spikes in late spring, causing stunted or distorted flowers; knock off with a strong water jet or introduce ladybird larvae.

Propagation

Primarily from seed sown on the surface of moist compost from late spring to midsummer — do not cover, as seeds are tiny and need light to germinate. Prick out seedlings when large enough to handle and plant out in autumn for flowers the following summer. Established clumps self-seed prolifically; weed out surplus seedlings to prevent overcrowding. Always handle seed and foliage with gloves. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Foxglove is toxic to pets. All parts contain cardiac glycosides — primarily digitoxin, digoxin, and digitalinum verum — that disrupt the sodium-potassium pump in heart muscle cells. ASPCA lists Digitalis purpurea as toxic to dogs, cats, and horses. Ingestion causes nausea, vomiting, irregular and potentially fatal cardiac arrhythmias, seizures, and death. Even small amounts of leaf material are dangerous to cats and small dogs. Seek immediate emergency veterinary care if ingestion is suspected. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Foxglove deep-dive guides

Every aspect of foxglove care, each with its own calibrated guide:

• Common foxglove problems & fixes
• Foxglove watering schedule
• Foxglove light requirements
• Best soil mix for foxglove
• Foxglove fertilizing guide
• When to repot foxglove
• How to propagate foxglove
• How to prune foxglove
• What's eating my foxglove?
• Foxglove growth rate & size
• Foxglove cold hardiness
• Foxglove temperature & humidity
• Is foxglove toxic to cats & dogs?
• Is foxglove toxic to cats?
• Is foxglove toxic to dogs?
• All 9 Digitalis varieties
• Getting foxglove to bloom

Featured in these plant shortlists

Foxglove qualifies for 6 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best humidity-loving houseplants — Houseplants that thrive in a bathroom, kitchen, or by a humidifier — selected by documented humidity preference.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Foxglove is also known as Foxglove, Common Foxglove, Lady's Glove, and Fairy Fingers.

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