Henbit Deadnettle (Lamium amplexicaule)

Henbit Deadnettle

Lamium amplexicaule

Soft purple blooms carpet lawns like scattered confetti. Low-growing annual herb; common name: henbit deadnettle.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Partial sun to full shade; tolerates dappled lawn light and low-light garden edges
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Watering Water when top 1–2 cm of soil dries; drought-tolerant once established in garden beds
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Temperature Hardy to -10°C; thrives in cool spring temperatures, declines in extreme summer heat above 25°C
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Characteristics

  • Leaf: Round to heart-shaped, softly hairy, clasping stem at base without petioles
  • Flower: Tubular purple-pink blooms in whorls at leaf axils, two-lipped corolla
  • Stem: Square, trailing or upright, densely hairy
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Horticulturist's Insider Field Notes (No AI Fluff)

The Golden 'Finger Test' Rule

Never water on a strict calendar. Stick your index finger 2 inches into the soil. If it feels cool and damp, wait 2–3 days. If bone dry, water thoroughly until it drains from the bottom holes.

Empty the Saucer After 20 Minutes

The #1 houseplant killer is water sitting in the catch tray. Stagnant runoff water starves roots of oxygen and causes root rot.

Turn the Pot Every 2 Weeks

Houseplants naturally lean toward the nearest window light. Give the pot a quarter-turn biweekly to maintain balanced, symmetrical architecture.

Wipe the Dust Away

Dust on leaves acts like a heavy sunshade. Gently wipe broad foliage with a damp cloth monthly to maximize photosynthesis and air purification.

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Care Guide

Watering

Keep soil slightly moist during peak bloom period

Fertilization

No regular feeding needed; thrives in low-nutrient soil. Optional light topdress with compost in early spring to boost bloom production

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle lightly over soil surface every 2 months to add calcium without raising soil pH
Pruning
  • Mow after flowering to prevent excessive self-seeding if unwanted in lawns
  • Trim back sprawling stems to maintain neat border edges
  • Remove dead foliage in late spring to tidy planting areas and reduce debris buildup
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Pet & Human Toxicity & Emergency Guide

🟢 Pet-Safe (Non-Toxic to Cats & Dogs)

Pet Safety Verified: According to clinical veterinary databases (ASPCA), Henbit Deadnettle (Lamium amplexicaule) is non-toxic to both cats and dogs, making it an excellent choice for pet-friendly homes.

Pet Tolerance

Leaves, stems, and flowers contain no systemic toxins or hazardous oxalates; safe for curious puppies and kittens.

Mild Fiber Sensitivity

While non-toxic, excessive consumption of fibrous leaves may cause mild, temporary stomach upset or regurgitation.

Recommended Placement

Safe for low tables, living rooms, and active pet environments.

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Troubleshooting & Common Plant Problems

Quick diagnostic guide for common care issues affecting Henbit Deadnettle (Lamium amplexicaule):

Yellowing Leaves

Most commonly caused by overwatering or poor drainage. Ensure topsoil dries out between waterings and check for root ventilation.

Brown or Crispy Leaf Tips

Low ambient humidity, hard tap water minerals, or direct midday sunburn. Increase humidity and use filtered water.

Drooping or Wilting Foliage

Indicates dehydration or root damage from prolonged waterlogging. Inspect soil moisture and root firmness.

Common Pests (Spider Mites, Aphids)

Dry indoor air encourages pests. Wipe leaves with a damp cloth and treat with insecticidal soap or neem oil.

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Propagation & Repotting Guide

  • Taking Cuttings: During active spring or summer growth, take a healthy 4–6 inch cutting just below a node using clean shears.
  • Rooting Medium: Place cuttings in fresh water or moist perlite mix in bright, indirect light; refresh water weekly.
  • Potting Up: Transplant into well-draining potting mix once roots reach 2 inches in length (typically 3–5 weeks).
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Seasonal Care Calendar

  • Spring & Summer (Active Growth): Water thoroughly as topsoil dries; apply diluted balanced fertilizer monthly; encourage steady growth.
  • Autumn (Transition): Gradually reduce watering frequency as daylight hours shorten; discontinue fertilization.
  • Winter (Dormancy): Water sparingly only when soil is mostly dry; protect from cold window drafts; keep in warm room.
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Frequently Asked Questions

How often should I water my Henbit Deadnettle?

Water thoroughly when the top 1–2 inches of soil feel dry. In active growth (spring/summer), water every 1–2 weeks; reduce significantly in winter.

Where is the best indoor location for Henbit Deadnettle?

Position in bright, filtered indirect light (e.g., near an east or south-facing window with sheer curtains). Avoid harsh direct midday sun.

Is Henbit Deadnettle toxic to pets?

ASPCA: Non-toxic to cats

When should I repot my Henbit Deadnettle?

Repot every 1–2 years in spring when roots outgrow the drainage holes or the soil depletes nutrients.

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental ground cover; edible young leaves for salads or herbal teas

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