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Fertilising guide

How to fertilise Yellow Archangel (Lamium galeobdolon)— schedule & NPK

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

More about yellow archangel

About Yellow Archangel

Lamium galeobdolon · also called Yellow Archangel, Golden Dead Nettle · flowering

A vigorous, shade-loving perennial ground cover native to European woodlands, producing whorls of bright yellow, hooded flowers in late spring above silver-marbled, oval leaves. Spreads energetically by stolons and can naturalise rapidly under trees. The straight species is invasive in parts of the Pacific Northwest and Mid-Atlantic US; named cultivars are preferred.

Growth habit: Vigorous, stoloniferous, semi-evergreen perennial ground cover; can spread aggressively

What fertiliser yellow archangel actually wants — and why

Yellow Archangel is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.

For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for yellow archangel: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.

How often to feed yellow archangel, and which months

Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For yellow archangel:

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. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

The dormant-season rule matters more than the exact interval: skip feeding entirely when yellow archangel is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.

What strength to mix for yellow archangel

Half strength is the safe default for yellow archangel — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

Feeding always goes onto already-damp soil, never dry roots — water yellow archangel first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the yellow archangel watering schedule.

Signs you are over-feeding yellow archangel

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for yellow archangel:

Signs you are under-feeding yellow archangel

If the symptoms point at watering, light or roots rather than nutrition, the full yellow archangel care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flush the pot of yellow archangel with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

Organic vs synthetic feeds for yellow archangel

Organic options

A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.

Synthetic / liquid feeds

A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.

Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.

Fertilising yellow archangel — frequently asked questions

What fertiliser does yellow archangel need?

A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Yellow Archangel is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.

How often should I feed yellow archangel?

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. 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. Treat that as sparingly through the growing season between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.

What strength of feed for yellow archangel?

Half strength is the safe default for yellow archangel — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding yellow archangel look like?

Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding yellow archangel year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.

Should I flush the soil of yellow archangel?

Flush the pot of yellow archangel with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.

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