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Hermann's Pride Yellow Archangel (Hermann's Pride Dead Nettle) care

Lamium galeobdolon 'Hermann's Pride'

Also called Hermann's Pride Yellow Archangel, Hermann's Pride Dead Nettle.

RHS H5USDA 6-9Mildly toxic to petsIndoor 20–30 cm tall (8–12 in)

Watering rhythm

7-14days

Every 7–14 days during the growing season; reduce in winter

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Light

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

Soil

Moist, humus-rich, free-draining loam

Humidity

Moderate; 45–65% RH

Temp

-15°C to 27°C

Pet safety

Mildly toxic to pets

Mature size

20–30 cm tall (8–12 in)

Care at a glance

Light

The Goldilocks zone. Not the south-facing windowsill (too hot, too direct), not the back of the room (too dim, growth stalls). Best in part shade to full shade. Dappled light under deciduous trees suits it perfectly. Avoid direct afternoon sun; the finely netted silver leaf markings lose contrast and foliage scorches. 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 hermann's pride yellow archangel: every 7–14 days during the growing season; reduce in winter. 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 moist, free-draining soil. Water during dry spells to prevent leaf wilting and tip scorch. Once established in shade with humus-rich soil, tolerates reasonable drought. Avoid waterlogging.

Soil and pot

Hermann's Pride Yellow Archangel grows best in moist, humus-rich, free-draining loam. Thrives in soil improved with leaf mould or garden compost. Tolerates a range of pH from mildly acid to mildly alkaline (5.5–7.5). Avoid compacted or persistently wet soils. 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

Hermann's Pride Yellow Archangel sits happiest at around Moderate; 45–65% RH humidity and -15°C to 27°C (5°F to 81°F). Suited to temperate outdoor humidity typical of UK and northern US garden conditions. Does not tolerate prolonged hot, humid conditions; ensure good airflow around the clump. 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 hermann's pride yellow archangel sparingly. Topdress with garden compost or well-rotted leaf mould in spring. A balanced granular fertiliser can be applied in early spring if growth is slow. Excess nitrogen reduces the compact, clumping habit. 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 hermann's pride yellow archangel in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Loss of silver leaf markings in deep shade — In extremely dark positions the intricate silver netting on leaves can fade, leaving predominantly green foliage. Move to a position with dappled or gentle indirect light to restore the variegation.
  • Slug damage — Slugs target the lush spring foliage, leaving ragged holes or devouring young shoots. Apply iron phosphate pellets around the clump or use other organic slug deterrents in early spring.
  • Sparse flowering in too much shade — Deep shade can reduce flower production. Plants in dappled light under deciduous canopy typically flower most freely. Avoid north-facing positions beneath evergreens with dense overhead canopy.

Propagation

Divide established clumps in early spring or early autumn. Short stem cuttings taken in late spring root well in free-draining cutting compost. Does not self-layer as freely as the species, so division is the most reliable method. 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

Hermann's Pride Yellow Archangel is mildly toxic to pets. Lamium galeobdolon is not individually listed by the ASPCA. The Lamiaceae family generally has low toxicity, but mild gastrointestinal irritation is possible if pets ingest significant quantities. Consult a vet if concerned about ingestion. 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.

Hermann's Pride Yellow Archangel care — frequently asked questions

What is the common name for Lamium galeobdolon 'Hermann's Pride'?

Lamium galeobdolon 'Hermann's Pride' is most commonly called Hermann's Pride Yellow Archangel, but it is also known as Hermann's Pride Yellow Archangel, Hermann's Pride Dead Nettle. The names refer to the same species, so care instructions for Hermann's Pride Yellow Archangel apply identically to anything sold as Hermann's Pride Dead Nettle.

How much light does hermann's pride yellow archangel need?

Hermann's Pride Yellow Archangel grows best in medium indirect light (a couple of metres from a window). Best in part shade to full shade. Dappled light under deciduous trees suits it perfectly. Avoid direct afternoon sun; the finely netted silver leaf markings lose contrast and foliage scorches.

How often should I water hermann's pride yellow archangel?

Water hermann's pride yellow archangel every 7–14 days during the growing season; reduce in winter. Prefers moist, free-draining soil. Water during dry spells to prevent leaf wilting and tip scorch. Once established in shade with humus-rich soil, tolerates reasonable drought. Avoid waterlogging. 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 hermann's pride yellow archangel toxic to cats and dogs?

Hermann's Pride Yellow Archangel is mildly toxic to pets. Lamium galeobdolon is not individually listed by the ASPCA. The Lamiaceae family generally has low toxicity, but mild gastrointestinal irritation is possible if pets ingest significant quantities. Consult a vet if concerned about ingestion.

What USDA hardiness zone does hermann's pride yellow archangel grow in?

Hermann's Pride Yellow Archangel is rated for USDA zone 6-9 and RHS hardiness H5. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Hermann's Pride Yellow Archangel deep-dive guides

Every aspect of hermann's pride yellow archangel care, each with its own calibrated guide:

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Hermann's Pride Yellow Archangel qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Hermann's Pride Yellow Archangel is also commonly called Hermann's Pride Yellow Archangel or Hermann's Pride Dead Nettle.