Fertilising guide
How to fertilise Wulfen's Alyssum (Alyssum wulfenianum)— schedule & NPK
Also called Wulfen's Alyssum, Wulfenia Alyssum.
More about wulfen's alyssum
About Wulfen's Alyssum
Alyssum wulfenianum · also called Wulfen's Alyssum, Wulfenia Alyssum · flowering
Wulfen's Alyssum is a rare, tufted alpine perennial from the eastern Alps and Dinaric mountains, forming a tight silver-grey cushion. It bears dense clusters of golden-yellow flowers in late spring, releasing a light honey fragrance. A choice plant for specialist rock gardens, alpine troughs, and scree beds, it demands exceptional drainage and full sun.
Growth habit: Tight cushion-forming perennial subshrub
Watch for — Failure to flower: Usually due to insufficient sunlight or excessive feeding. Ensure full sun exposure and withhold all but the lightest spring feed. Young plants may take 1–2 years to reach flowering maturity.
What fertiliser wulfen's alyssum actually wants — and why
Wulfen's Alyssum 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 wulfen's alyssum: 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 wulfen's alyssum, 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 wulfen's alyssum:
Virtually no feeding required. At most, a very light dusting of balanced slow-release granules in early spring. Lean growing conditions are essential to maintain the characteristic tight cushion form. 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 wulfen's alyssum 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 wulfen's alyssum
Half strength is the safe default for wulfen's alyssum — 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 wulfen's alyssum first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the wulfen's alyssum watering schedule.
Signs you are over-feeding wulfen's alyssum
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for wulfen's alyssum:
- 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 wulfen's alyssum
- 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 wulfen's alyssum care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of wulfen's alyssum 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 wulfen's alyssum
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 wulfen's alyssum — frequently asked questions
What fertiliser does wulfen's alyssum 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. Wulfen's Alyssum 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 wulfen's alyssum?
Virtually no feeding required. At most, a very light dusting of balanced slow-release granules in early spring. Lean growing conditions are essential to maintain the characteristic tight cushion form. Virtually no feeding required. At most, a very light dusting of balanced slow-release granules in early spring. Lean growing conditions are essential to maintain the characteristic tight cushion form. 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 wulfen's alyssum?
Half strength is the safe default for wulfen's alyssum — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding wulfen's alyssum 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 wulfen's alyssum 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 wulfen's alyssum?
Flush the pot of wulfen's alyssum 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
- Wulfen's Alyssum care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water wulfen's alyssum — 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 liriodendron tulipifera
- How to fertilise paulownia tomentosa
- How to fertilise laburnum × watereri 'vossii'
- All 8452 fertilising guides in the Growli library