Fertilising guide
How to fertilise Many-haired Draba (Draba polytricha)— schedule & NPK
Also called Many-haired Draba, Many-haired Whitlowgrass.
More about many-haired draba
About Many-haired Draba
Draba polytricha · also called Many-haired Draba, Many-haired Whitlowgrass · flowering
Many-haired Draba is a specialist cushion alpine from volcanic and rocky habitats in Turkey and Armenia, characterised by leaves densely clothed in star-shaped (stellate) hairs giving the plant a silver-grey appearance. Bright yellow flowers emerge in early spring on very short stems. It is highly regarded by alpine enthusiasts and best grown in an alpine house or well-protected trough.
Growth habit: Dense, silver-grey cushion-forming evergreen alpine perennial; rosettes of stellate-hairy leaves forming a dome of 3–6 cm tall at rest, with flower stems to 8 cm.
What fertiliser many-haired draba actually wants — and why
Many-haired Draba 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 many-haired draba: 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 many-haired draba, 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 many-haired draba:
Apply a single very dilute low-nitrogen alpine feed (e.g. 3-7-5) in early spring only. This species is adapted to extremely nutrient-poor volcanic substrates; any enrichment encourages soft, disease-prone growth. 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 many-haired draba 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 many-haired draba
Half strength is the safe default for many-haired draba — 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 many-haired draba first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the many-haired draba watering schedule.
Signs you are over-feeding many-haired draba
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for many-haired draba:
- 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 many-haired draba
- 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 many-haired draba care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of many-haired draba 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 many-haired draba
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 many-haired draba — frequently asked questions
What fertiliser does many-haired draba 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. Many-haired Draba 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 many-haired draba?
Apply a single very dilute low-nitrogen alpine feed (e.g. 3-7-5) in early spring only. This species is adapted to extremely nutrient-poor volcanic substrates; any enrichment encourages soft, disease-prone growth. Apply a single very dilute low-nitrogen alpine feed (e.g. 3-7-5) in early spring only. This species is adapted to extremely nutrient-poor volcanic substrates; any enrichment encourages soft, disease-prone growth. 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 many-haired draba?
Half strength is the safe default for many-haired draba — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding many-haired draba 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 many-haired draba 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 many-haired draba?
Flush the pot of many-haired draba 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
- Many-haired Draba care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water many-haired draba — 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 hydrangea 'annabelle'
- How to fertilise hydrangea 'limelight'
- How to fertilise oakleaf hydrangea
- All 8452 fertilising guides in the Growli library