Fertilising guide
How to fertilise Welwitsch's Anchomanes (Anchomanes welwitschii)— schedule & NPK
Also called Welwitsch's Anchomanes, African Anchomanes.
More about welwitsch's anchomanes
About Welwitsch's Anchomanes
Anchomanes welwitschii · also called Welwitsch's Anchomanes, African Anchomanes · tropical
Anchomanes welwitschii is a dramatic West and Central African tuberous aroid producing a single, large compound leaf on a spiny petiole that can reach over a metre in height. Suited to warm, humid tropical conditions with a pronounced dry-season dormancy. Rarely cultivated outside specialist collections, it demands humus-rich soil, warm temperatures, and ample indirect light.
Growth habit: Tuberous geophytic aroid; produces a single large compound leaf annually, dying back to tuber in dry season
What fertiliser welwitsch's anchomanes actually wants — and why
Welwitsch's Anchomanes 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 welwitsch's anchomanes: 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 welwitsch's anchomanes, 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 welwitsch's anchomanes:
Apply a balanced liquid fertiliser (e.g. 10-10-10) monthly during the active growing season. A light feed high in potassium and phosphorus before dormancy can support tuber development. Do not feed during dormancy. Treat that as monthly 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 welwitsch's anchomanes 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 welwitsch's anchomanes
Half strength is the safe default for welwitsch's anchomanes — 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 welwitsch's anchomanes first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the welwitsch's anchomanes watering schedule.
Signs you are over-feeding welwitsch's anchomanes
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for welwitsch's anchomanes:
- 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.
Signs you are under-feeding welwitsch's anchomanes
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full welwitsch's anchomanes care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of welwitsch's anchomanes 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 welwitsch's anchomanes
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 welwitsch's anchomanes — frequently asked questions
What fertiliser does welwitsch's anchomanes 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. Welwitsch's Anchomanes 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 welwitsch's anchomanes?
Apply a balanced liquid fertiliser (e.g. 10-10-10) monthly during the active growing season. A light feed high in potassium and phosphorus before dormancy can support tuber development. Do not feed during dormancy. Apply a balanced liquid fertiliser (e.g. 10-10-10) monthly during the active growing season. A light feed high in potassium and phosphorus before dormancy can support tuber development. Do not feed during dormancy. Treat that as monthly 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 welwitsch's anchomanes?
Half strength is the safe default for welwitsch's anchomanes — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding welwitsch's anchomanes 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 welwitsch's anchomanes 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 welwitsch's anchomanes?
Flush the pot of welwitsch's anchomanes 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
- Welwitsch's Anchomanes care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water welwitsch's anchomanes — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise nepenthes tenuis
- How to fertilise nepenthes merrilliana
- How to fertilise nepenthes copelandii
- All 8452 fertilising guides in the Growli library