Spotted Dead Nettle (Spotted Henbit) care

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Performs well in partial to full shade, making it one of the most reliable flowering groundcovers for difficult shaded spots. Tolerates more sun in cool, moist climates but needs consistent moisture in full sun to avoid summer dormancy. Silver-variegated cultivars tend to bleach in strong sun; all-green forms are slightly more sun-tolerant. If you can't decide, a free phone lux-meter app aimed at the leaf at noon should read between 800 and 1,500 lux.

Watering

Watering spotted dead nettle: every 5–7 days in active growth; reduce to every 10–14 days in cool or dormant periods. 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; in dry conditions or full sun, plants go summer-dormant and foliage declines by midsummer (recovers in autumn). Mulch to retain moisture. Avoid waterlogged soils, which cause crown and root rot. Good drainage is as important as moisture retention.

Soil and pot

Spotted Dead Nettle grows best in moist, well-draining loam or loam-sand mix; adaptable to most average garden soils. Accepts a wide pH range (5.5–7.5) and tolerates both clay-heavy and sandy soils if drainage is adequate. Enriching with compost improves performance in very poor soils. Avoid dense, compacted clay without amendment. In containers, use standard multipurpose compost with 15–20% perlite. 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

Spotted Dead Nettle sits happiest at around 40–70% humidity and -40°C to 32°C (-40°F to 90°F). Adaptable to typical temperate outdoor humidity. Good air circulation reduces the risk of downy mildew and fungal leaf spots, which can disfigure foliage in hot, humid, stagnant conditions. In humid southern US climates, plant in locations with morning sun and afternoon shade to improve airflow. 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 spotted dead nettle sparingly. Apply a balanced slow-release granular fertiliser (e.g. 10-10-10) once in early spring. Over-fertilising with high nitrogen causes lush, flopping growth at the expense of flowers and silver leaf patterning. In very poor soils, a second light liquid feed in early summer helps sustain flowering through summer. 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 spotted dead nettle in the Growli community. Each is annotated with the most common cause so you know where to start.

• Summer dormancy and dieback — In hot, dry summers or full sun, foliage yellows and the plant goes dormant by midsummer — this is normal, not a disease. Cut back declining stems to encourage fresh autumn regrowth. Site in shade and maintain moisture to avoid or reduce summer dormancy.
• Downy mildew and fungal leaf spots — White downy patches or brown leaf spots appear in cool, wet, or humid and stagnant conditions. Improve air circulation by thinning dense patches; avoid overhead watering. Remove affected foliage. Severe cases can be treated with copper-based fungicide, though good cultural practice usually suffices.
• Invasive spreading — Lamium maculatum spreads rapidly by rooting stolons and can overwhelm adjacent plants in ideal conditions. Edge plantings seasonally with a spade to control spread. In warmer zones (7–8) it can become a persistent weed; remove runners before they root. Choose less vigorous cultivars (e.g. 'White Nancy', 'Beacon Silver') for smaller gardens.

Propagation

Extremely easy by division in spring or autumn — pull apart rooted sections and replant directly. Stem cuttings (5–8 cm tip cuttings) root readily in moist compost within 2–3 weeks. Self-layers freely from stolons; simply detach rooted runners and transplant. Seed is viable but cultivar characteristics do not come true from seed. 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

Spotted Dead Nettle is pet-safe. Lamium maculatum (dead nettle) is not listed by the ASPCA as toxic to dogs or cats. It is in the Lamiaceae (mint) family, which contains many culinary herbs and is generally considered non-toxic. Regarded as safe around pets; no reported toxic principles for dogs or cats in available horticultural and veterinary literature. 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.

Spotted Dead Nettle deep-dive guides

Every aspect of spotted dead nettle care, each with its own calibrated guide:

• Common spotted dead nettle problems & fixes
• Spotted Dead Nettle watering schedule
• Spotted Dead Nettle light requirements
• Best soil mix for spotted dead nettle
• Spotted Dead Nettle fertilizing guide
• When to repot spotted dead nettle
• How to propagate spotted dead nettle
• How to prune spotted dead nettle
• What's eating my spotted dead nettle?
• Spotted Dead Nettle growth rate & size
• Spotted Dead Nettle cold hardiness
• Spotted Dead Nettle temperature & humidity
• Is spotted dead nettle toxic to cats & dogs?
• Is spotted dead nettle toxic to cats?
• Is spotted dead nettle toxic to dogs?
• All 8 Lamium varieties
• Getting spotted dead nettle to bloom

Featured in these plant shortlists

Spotted Dead Nettle qualifies for 13 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best pet-safe houseplants — Houseplants the ASPCA lists as non-toxic to cats and dogs — every one verified against the ASPCA toxic and non-toxic plant list.
• Best low-light houseplants — Houseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
• 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 pet-safe low-light plants — Non-toxic to cats and dogs AND happy with no direct sun — the two hardest constraints to satisfy at once.
• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best houseplants for beginners — Forgiving of irregular light and watering — the houseplants least likely to die in a new plant parent’s first season.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best pet-safe low-maintenance plants — Non-toxic to cats and dogs and forgiving of forgotten watering — the easiest safe choices for a busy pet household.
• Best pet-safe flowering plants — Flowering houseplants the ASPCA lists as non-toxic to cats and dogs — colour and blooms in a pet home, without the worry.
• Best fast-growing houseplants — Houseplants documented as fast or vigorous growers — quick to fill a pot, cover a pole or trail down a shelf.
• Best pet-safe bedroom plants — Non-toxic to cats and dogs and happy in lower light — calming greenery for a bedroom where a pet often sleeps too.
• Best cat-safe plants — Houseplants the ASPCA lists as non-toxic to cats (and dogs) — safe greenery for a home with a curious cat.
• Best dog-safe plants — Houseplants the ASPCA lists as non-toxic to dogs (and cats) — safe greenery for a home with a curious dog.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Spotted Dead Nettle is also known as Spotted Dead Nettle, Spotted Henbit, and Purple Dragon Dead Nettle.

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