Growli
Let's go

Fertilising guide

How to fertilise Alpine Butterwort (Pinguicula alpina)— schedule & NPK

Also called alpine butterwort, white-flowered butterwort.

More about alpine butterwort

About Alpine Butterwort

Pinguicula alpina · also called alpine butterwort, white-flowered butterwort · houseplant

Alpine butterwort is a cold-hardy temperate carnivore from European and Asian mountains, forming a flat rosette of greasy, sticky leaves that glue down small insects. It needs cool conditions, pure mineral-free water, a gritty calcareous mix, and a true winter dormancy as a resting hibernaculum. White spurred flowers appear in spring.

Growth habit: Low, flat-pressed evergreen-to-summer rosette of pale, buttery, incurved leaves; in winter it shrinks to a tight resting bud (hibernaculum) at soil level.

Watch for — Mineral damage from hard water: Tap-water salts harm the roots and brown the leaves; water only with rainwater, distilled or RO water.

What fertiliser alpine butterwort actually wants — and why

Alpine Butterwort 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 alpine butterwort: 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 alpine butterwort, 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 alpine butterwort:

No soil fertiliser. It feeds on tiny gnats and springtails stuck to its leaves; indoors you can occasionally dust the leaves with a few rehydrated bloodworms. Root feeding burns this species. 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 alpine butterwort 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 alpine butterwort

Half strength is the safe default for alpine butterwort — 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 alpine butterwort first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the alpine butterwort watering schedule.

Signs you are over-feeding alpine butterwort

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

Signs you are under-feeding alpine butterwort

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

Flushing and leaching the salts

Flush the pot of alpine butterwort 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 alpine butterwort

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 alpine butterwort — frequently asked questions

What fertiliser does alpine butterwort 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. Alpine Butterwort 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 alpine butterwort?

No soil fertiliser. It feeds on tiny gnats and springtails stuck to its leaves; indoors you can occasionally dust the leaves with a few rehydrated bloodworms. Root feeding burns this species. No soil fertiliser. It feeds on tiny gnats and springtails stuck to its leaves; indoors you can occasionally dust the leaves with a few rehydrated bloodworms. Root feeding burns this species. 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 alpine butterwort?

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

What does over-feeding alpine butterwort 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 alpine butterwort 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 alpine butterwort?

Flush the pot of alpine butterwort 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.

Keep reading