Fertilising guide
How to fertilise English Lavender (Lavandula angustifolia 'Hidcote')— schedule & NPK
Also called True Lavender, Hidcote Lavender.
More about english lavender
About English Lavender
Lavandula angustifolia 'Hidcote' · also called True Lavender, Hidcote Lavender · herb
'Hidcote' is a compact English lavender prized for deep violet-blue flower spikes, silvery aromatic foliage, and strong cold-hardiness. It demands full sun and sharp, even poor drainage, thriving on neglect once established. Beloved by bees and ideal for low hedging, it dislikes rich, wet soil and benefits from a firm post-flowering trim.
Growth habit: Compact, rounded, woody-based evergreen subshrub forming a tidy silvery mound topped by short flower spikes; one of the neatest, most hedge-friendly lavenders.
What fertiliser english lavender actually wants — and why
English Lavender is a soft, fast leafy herb that you harvest hard — a modest balanced feed keeps tender growth coming without tipping it into bland or bolting.
A balanced general feed (even N-P-K) at modest strength — enough nitrogen to keep replacing the leaves you pick, but not so much that flavour thins or it bolts to seed.
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 english lavender: 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 english lavender, 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 english lavender:
Needs minimal feeding and thrives in poor soil. Skip rich fertiliser; at most a light dressing of compost or a low-nitrogen feed in spring. Over-feeding gives lush, weak growth, fewer flowers, and reduced essential-oil concentration. In practice: a balanced liquid feed every few weeks through the main growing and harvesting season (spring through early autumn), more often the harder you are picking it.
The dormant-season rule matters more than the exact interval: skip feeding entirely when english lavender 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 english lavender
Half strength is a sensible default for english lavender — enough to fuel regrowth after cutting, gentle enough that the leaves stay aromatic rather than watery.
Feeding always goes onto already-damp soil, never dry roots — water english lavender first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the english lavender watering schedule.
Signs you are over-feeding english lavender
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for english lavender:
- Fast, soft, pale growth with diluted, less aromatic flavour.
- Early bolting (running to flower) and a bitter edge.
- Salt crust and scorched tips on container plants.
Signs you are under-feeding english lavender
- Pale, slow regrowth after cutting and small leaves.
- A tired, stalled plant that cannot keep up with harvesting.
- Yellowing older leaves in a long-spent pot.
If the symptoms point at watering, light or roots rather than nutrition, the full english lavender care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Pot-grown english lavender builds up feed salts quickly — water until it drains each time and flush the pot with plain water every few weeks, especially on a sunny windowsill.
Organic vs synthetic feeds for english lavender
Organic options
A diluted seaweed feed or worm-casting tea keeps soft growth coming without overdoing it. UK: dilute seaweed or Westland; US: Espoma Garden-tone or Neptune's Harvest. Gentle, hard to overdo, flavour-friendly.
Synthetic / liquid feeds
A balanced liquid feed at half strength through harvesting — UK: Phostrogen, Baby Bio or Westland; US: Miracle-Gro all-purpose at half strength. Fast regrowth; just do not overdo the nitrogen.
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 english lavender — frequently asked questions
What fertiliser does english lavender need?
A balanced general feed (even N-P-K) at modest strength — enough nitrogen to keep replacing the leaves you pick, but not so much that flavour thins or it bolts to seed. English Lavender is a soft, fast leafy herb that you harvest hard — a modest balanced feed keeps tender growth coming without tipping it into bland or bolting.
How often should I feed english lavender?
Needs minimal feeding and thrives in poor soil. Skip rich fertiliser; at most a light dressing of compost or a low-nitrogen feed in spring. Over-feeding gives lush, weak growth, fewer flowers, and reduced essential-oil concentration. Needs minimal feeding and thrives in poor soil. Skip rich fertiliser; at most a light dressing of compost or a low-nitrogen feed in spring. Over-feeding gives lush, weak growth, fewer flowers, and reduced essential-oil concentration. In practice: a balanced liquid feed every few weeks through the main growing and harvesting season (spring through early autumn), more often the harder you are picking it.
What strength of feed for english lavender?
Half strength is a sensible default for english lavender — enough to fuel regrowth after cutting, gentle enough that the leaves stay aromatic rather than watery.
What does over-feeding english lavender look like?
Fast, soft, pale growth with diluted, less aromatic flavour. Early bolting (running to flower) and a bitter edge. Salt crust and scorched tips on container plants. Over-feeding english lavender with strong nitrogen is the usual mistake — it grows fast and lush but the leaves turn bland and it bolts to flower sooner, ending the useful harvest early.
Should I flush the soil of english lavender?
Pot-grown english lavender builds up feed salts quickly — water until it drains each time and flush the pot with plain water every few weeks, especially on a sunny windowsill.
Keep reading
- English Lavender care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water english lavender — 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 basil
- How to fertilise herb garden
- How to fertilise mint
- All 1284 fertilising guides in the Growli library