Growli

Plant care

Yellow Archangel (Golden Dead Nettle) care

Lamium galeobdolon

Also called Yellow Archangel, Golden Dead Nettle, Aluminium Plant (UK).

RHS H6USDA 4-9Mildly toxic to petsIndoor 20–30 cm tall (8–12 in)

Watering rhythm

7-14days

Every 7–14 days; drought-tolerant once established in shade

Light

Medium indirect light (a couple of metres from a window)

Soil

Humus-rich, moist, free-draining loam

Humidity

Moderate to high; 50–70% RH

Temp

-20°C to 27°C

Pet safety

Mildly toxic to pets

Mature size

20–30 cm tall (8–12 in)

Care at a glance

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness yellow archangel grows fastest in. Thrives in full shade to part shade; tolerates dappled woodland light. Intolerant of prolonged direct sun, which scorches foliage and fades the silver leaf markings. Ideal under deciduous trees. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for every 7–14 days; drought-tolerant once established in shade for yellow archangel, but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Prefers consistently moist conditions but tolerates dry shade once well established. Water during prolonged dry spells in summer. Avoid waterlogged soil, especially in winter.

Soil and pot

Yellow Archangel grows best in humus-rich, moist, free-draining loam. Grows in light, medium, or heavy (clay) soils. Suits mildly acid to mildly alkaline conditions (pH 5.5–7.5). Best performance in soil enriched with leaf mould or garden compost. 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

Yellow Archangel sits happiest at around Moderate to high; 50–70% RH humidity and -20°C to 27°C (-4°F to 81°F). Naturally grows in temperate woodland where humidity is moderate to high. Tolerant of typical UK and cool-US garden conditions. Excessive heat and low humidity cause leaf stress. 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 yellow archangel sparingly. Generally does not require feeding if grown in humus-rich soil. A light topdress of garden compost in spring supports healthy growth. Avoid high-nitrogen fertilisers that promote excessive, invasive spread. 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 yellow archangel in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Invasive spreadThe straight species spreads vigorously and is listed as an invasive weed in several US states. Plant named cultivars such as 'Hermann's Pride' or 'Florentinum' which are less rampant, and remove unwanted runners promptly.
  • Leaf scorch in sunDirect sun causes silver-marbled leaves to bleach and develop brown, papery patches. Move or provide shade if this occurs; the plant recovers quickly once sheltered.
  • Legginess after floweringAfter the main spring flower flush, stems can become long and untidy. Trim back by one-half to two-thirds to encourage a fresh flush of well-marked foliage.

Propagation

Easily propagated by division of clumps in spring or autumn. Stem cuttings root readily in moist compost. Naturally self-layers at every stem node that touches moist soil, making control of spread as important as propagation. 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

Yellow Archangel is mildly toxic to pets. Lamium galeobdolon is not individually listed by the ASPCA, but the species is in the Lamiaceae family which generally has low toxicity. Some sources note mild gastrointestinal irritation is possible if large quantities are ingested by pets. Treat with caution; consult a vet if significant ingestion occurs. 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.

Yellow Archangel care — frequently asked questions

What is the common name for Lamium galeobdolon?

Lamium galeobdolon is most commonly called Yellow Archangel, but it is also known as Yellow Archangel, Golden Dead Nettle, Aluminium Plant (UK). The names refer to the same species, so care instructions for Yellow Archangel apply identically to anything sold as Golden Dead Nettle.

How much light does yellow archangel need?

Yellow Archangel grows best in medium indirect light (a couple of metres from a window). Thrives in full shade to part shade; tolerates dappled woodland light. Intolerant of prolonged direct sun, which scorches foliage and fades the silver leaf markings. Ideal under deciduous trees.

How often should I water yellow archangel?

Water yellow archangel every 7–14 days; drought-tolerant once established in shade. Prefers consistently moist conditions but tolerates dry shade once well established. Water during prolonged dry spells in summer. Avoid waterlogged soil, especially in winter. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is yellow archangel toxic to cats and dogs?

Yellow Archangel is mildly toxic to pets. Lamium galeobdolon is not individually listed by the ASPCA, but the species is in the Lamiaceae family which generally has low toxicity. Some sources note mild gastrointestinal irritation is possible if large quantities are ingested by pets. Treat with caution; consult a vet if significant ingestion occurs.

What USDA hardiness zone does yellow archangel grow in?

Yellow Archangel is rated for USDA zone 4-9 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Yellow Archangel deep-dive guides

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

Featured in these plant shortlists

Yellow Archangel qualifies for 9 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Yellow Archangel is also known as Yellow Archangel, Golden Dead Nettle, and Aluminium Plant (UK).