Yellow archangel
Also known as
Golden dead-nettle, Yellow dead-nettle, Archangel, Lamiastrum
Keep this plant’s care guide close at hand.
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Lamium galeobdolon, commonly called yellow archangel, is a rhizomatous, semi-evergreen perennial in the mint family (Lamiaceae) valued as a vigorous groundcover for shade. Native to Europe and western Asia, it creeps by stolons, forming dense mats of nettle-like, serrated leaves, often handsomely marbled with silver in ornamental cultivars. In mid-spring to early summer, whorls of hooded, yellow, nectar-rich flowers appear at the leaf nodes, attracting bumblebees and other pollinators. It thrives in woodland conditions—humus-rich, well-drained soils with consistent moisture and dappled light—but adapts to a range of soils, including slightly alkaline sites. Deer and rabbits typically avoid its aromatic foliage. While excellent for stabilizing slopes and filling dry shade, it can spread aggressively beyond intended areas, especially variegated forms, and is considered invasive in parts of North America. Use responsibly by containing roots and removing escaped patches near natural areas. Durable, low-maintenance, and cold-hardy, it provides year-round texture and spring color in shaded gardens.
Taxonomy
Properties & Requirements
How to care for Yellow archangel
Water
Water newly planted patches regularly for the first growing season, keeping the top 2–3 cm of soil evenly moist. Once established, yellow archangel is moderately drought-tolerant in shade, needing supplemental water only during extended dry spells. In containers or very free-draining soils, water when the top 2–5 cm are dry. Avoid waterlogging, which promotes root rot, especially in dense shade. Morning watering minimizes foliar disease; allow foliage to dry before nightfall where humidity is high.
Light
Prefers partial to full shade with dappled or morning sun. In cool-summer climates it tolerates a few hours of gentle sun, but foliage may scorch or wilt in intense afternoon sun, especially variegated forms. Deep shade is tolerated, though flowering may be reduced. Aim for bright, indirect light beneath open-canopy trees or on the north/east side of structures. Avoid reflective heat or south-facing exposures without adequate moisture and mulch.
Nutrients
As a woodland perennial, yellow archangel needs modest feeding. Incorporate compost or leaf mold in spring to replenish organic matter and micronutrients. In poor soils, apply a light, balanced, slow-release fertilizer (e.g., 5-5-5) at half the label rate once in early spring. Avoid high nitrogen that encourages floppy, overly lush growth. Mulching annually with shredded leaves maintains fertility and moisture. Do not fertilize in late summer to avoid stimulating tender growth before frost.
Temperature
Hardy in USDA Zones 4–9, yellow archangel tolerates winter lows near −29 °C (−20 °F) once established. Ideal growth occurs between 10–24 °C (50–75 °F). In hot climates, provide deep shade and consistent moisture during heat waves above 30 °C (86 °F). Winter mulch in exposed sites helps prevent frost heave, especially in newly planted areas. It is not suited to prolonged indoor, heated conditions; treat primarily as an outdoor groundcover.
