Red Dead Nettle (Lamium purpureum) - How to Grow & Care Guide

Plant Snapshot

Common Name: Red Dead Nettle
Latin Name: Lamium purpureum
Alternate Names: Purple dead-nettle, dead-nettle
Hardiness Zones: USDA zones 4–9. Survives cold winters and reappears as an early spring plant. In warmer zones it can persist and self-seed more aggressively.
Typical Height: About 2–8 in (5–20 cm) tall.
Typical Spread: Individual plants form mats roughly 6–12 in (15–30 cm) across and can cover ground by reseeding.
Bloom Period: Late winter to spring in temperate climates, often appearing very early in the season.
Soil Preferences: Prefers moist, well-drained soil but tolerates poor, compacted and clay soils. Neutral to slightly alkaline pH tolerated. Poor drainage can reduce vigor.
Light Preferences: Full sun to part shade. Tolerates full shade but flowers best with some direct sun in the growing season.
Toxicity: Not widely reported as toxic. Foraging guides list young leaves as edible when clean. Confirm with local poison control for pet or child exposure concerns.
Propagation: Primarily by seed and self-seeding. May root from stem fragments and can be thinned or moved by division in some conditions.

Key Facts

Low growing matted annual or winter annual herb in the mint family.
Produces small tubular pink to purple flowers held above scalloped leaves.
Common early spring nectar source for bees.
Reproduces chiefly by seed and self-seeds readily.
Tolerant of a wide range of soil types and compacted ground.
Often treated as a garden weed but can form attractive groundcover.
Young leaves are reported edible by foraging guides though verify before use.

Red Dead Nettle (Lamium purpureum) is a low growing matted annual or winter annual in the mint family that appears very early in the season. It forms low mats of scalloped leaves topped by small tubular pink to purple flowers and spreads readily by seed.

Identification

Plants reach about 2 to 8 inches tall and form mats roughly 6 to 12 inches across. Leaves are scalloped and opposite, stems square, and flowers are small tubular pink to purple clusters held above the foliage. Its low habit and early bloom make it obvious in late winter and spring.

Where to grow and best uses

Use Red Dead Nettle as an early spring groundcover where a low, self-seeding plant is acceptable. It tolerates compacted or poor soil and grows in full sun to part shade. Hardy roughly to USDA zones 4 through 9, it can naturalize in lawns, beds and bare patches.

Planting and seasonal timing

Flowers appear late winter to spring, often very early in the season (Feb through May in the Northern Hemisphere). The species reproduces chiefly by seed and commonly self-seeds, so plants either appear from existing seed in place or establish quickly from nearby seed sources. Exact timing varies by local climate.

Spacing and planting

Individual plants form low mats about 6 to 12 inches across, so allow similar spacing if you want a continuous carpet or place plants closer to encourage faster cover. Seed is the main propagation route; seedlings fill gaps and colonies expand by reseeding rather than deep planting or division.

Water and soil

Prefers moist, well-drained soil but tolerates poor, compacted and clay soils. Neutral to slightly alkaline pH is acceptable. In heavy poorly drained sites plants become less vigorous, while ordinary garden soil supports reliable growth and spring flowering.

After-flowering care and maintenance

After bloom let plants set seed to naturalize or remove flower heads before seeds mature to limit spread. Thin mats by hand pulling or digging to open soil for other plants. Vegetative fragments can sometimes root so thorough removal is needed where control is desired.

Spread and managing self-seeding

Reproduces chiefly by seed and self-seeds readily, so expect colonies to expand over seasons unless seed heads are removed. Control by cutting or pulling before seed set, using mulch to suppress seedlings, and regular hand-thinning in beds and lawns to prevent unwanted takeover.

Frequently asked questions

How fast does Red Dead Nettle grow?: It establishes quickly in early spring, forming low mats within a season through abundant seedlings and reseeding from mature plants.
Is Red Dead Nettle edible?: Foraging guides report young leaves are edible when clean. Verify edibility and pet or child safety with local poison control before consuming.
Is it invasive?: It is often treated as a garden weed because it self-seeds readily and can cover bare ground, but it is not typically listed as a destructive invasive in cultivated beds.
What hardiness zones does it tolerate?: Plants are generally hardy in roughly USDA zones 4 to 9 and reappear as an early spring species in colder zones.
Will it grow in shade?: Yes. It tolerates full shade but flowers best with some direct sun during the growing season.