Fertilising guide
How to fertilise Valentine's Crown Vetch (Coronilla valentina)— schedule & NPK
Also called Valentine's Crown Vetch, Mediterranean Crown Vetch, Shrubby Scorpion Vetch.
More about valentine's crown vetch
About Valentine's Crown Vetch
Coronilla valentina · also called Valentine's Crown Vetch, Mediterranean Crown Vetch · flowering
Coronilla valentina is a compact, bushy evergreen shrub native to the Mediterranean basin, valued for its clusters of intensely honey-scented bright yellow pea flowers that can appear from late winter through spring and often again in autumn. It thrives in full sun on sharply drained, poor to moderately fertile soils and is one of the more drought-tolerant ornamental shrubs for mild coastal gardens. The most important care fact is that it needs a sheltered, frost-free or lightly frosted position — it is not reliably hardy below about -5 °C (23 °F) and is best grown against a warm, south- or west-facing wall in cooler areas. Coronilla contains coronillin and other glycosides considered toxic to dogs and cats if ingested in quantity.
Growth habit: Compact, bushy evergreen shrub with glaucous blue-green pinnate leaves and axillary umbels of fragrant bright yellow pea-flowers; subsp. glauca is the most commonly grown form.
What fertiliser valentine's crown vetch actually wants — and why
Valentine's Crown Vetch 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 valentine's crown vetch: 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 valentine's crown vetch, 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 valentine's crown vetch:
Feed with a low-nitrogen, potassium-rich fertiliser (e.g. tomato feed at half strength) once in early spring; do not over-fertilise as this promotes lush soft growth susceptible to frost damage. 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 valentine's crown vetch 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 valentine's crown vetch
Half strength is the safe default for valentine's crown vetch — 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 valentine's crown vetch first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the valentine's crown vetch watering schedule.
Signs you are over-feeding valentine's crown vetch
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for valentine's crown vetch:
- 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 valentine's crown vetch
- 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 valentine's crown vetch care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of valentine's crown vetch 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 valentine's crown vetch
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 valentine's crown vetch — frequently asked questions
What fertiliser does valentine's crown vetch 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. Valentine's Crown Vetch 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 valentine's crown vetch?
Feed with a low-nitrogen, potassium-rich fertiliser (e.g. tomato feed at half strength) once in early spring; do not over-fertilise as this promotes lush soft growth susceptible to frost damage. Feed with a low-nitrogen, potassium-rich fertiliser (e.g. tomato feed at half strength) once in early spring; do not over-fertilise as this promotes lush soft growth susceptible to frost damage. 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 valentine's crown vetch?
Half strength is the safe default for valentine's crown vetch — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding valentine's crown vetch 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 valentine's crown vetch 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 valentine's crown vetch?
Flush the pot of valentine's crown vetch 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
- Valentine's Crown Vetch care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water valentine's crown vetch — 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 acer rubrum 'autumn blaze'
- How to fertilise oxydendrum arboreum
- How to fertilise halesia carolina
- All 10153 fertilising guides in the Growli library