Fertilising guide
How to fertilise Tutsan (Hypericum androsaemum)— schedule & NPK
Also called Tutsan, Sweet Amber, Park Leaves, All-heal.
More about tutsan
About Tutsan
Hypericum androsaemum · also called Tutsan, Sweet Amber · herb
A semi-evergreen shrubby herb native to open woodlands and hedgerows across Europe and western Asia. Produces bright yellow flowers from June to August followed by ornamental berries that ripen through red to glossy black. Valued historically as a wound herb; today grown for ornament, wildlife value, and cut-flower berries.
Growth habit: Semi-evergreen to deciduous multi-stemmed shrub; upright to arching habit; produces yellow flowers followed by ornamental berries changing colour from green through yellow, red, and black
What fertiliser tutsan actually wants — and why
Tutsan 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 tutsan: 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 tutsan, 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 tutsan:
Light feeding suits this species. Apply a balanced slow-release granular fertiliser in spring. A mulch of well-rotted compost applied annually provides sufficient nutrients in most soils. Avoid heavy nitrogen feeds which promote lush, disease-susceptible leafy growth. 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 tutsan 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 tutsan
Half strength is a sensible default for tutsan — 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 tutsan first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the tutsan watering schedule.
Signs you are over-feeding tutsan
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for tutsan:
- 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 tutsan
- 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 tutsan care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Pot-grown tutsan 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 tutsan
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 tutsan — frequently asked questions
What fertiliser does tutsan 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. Tutsan 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 tutsan?
Light feeding suits this species. Apply a balanced slow-release granular fertiliser in spring. A mulch of well-rotted compost applied annually provides sufficient nutrients in most soils. Avoid heavy nitrogen feeds which promote lush, disease-susceptible leafy growth. Light feeding suits this species. Apply a balanced slow-release granular fertiliser in spring. A mulch of well-rotted compost applied annually provides sufficient nutrients in most soils. Avoid heavy nitrogen feeds which promote lush, disease-susceptible leafy growth. 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 tutsan?
Half strength is a sensible default for tutsan — enough to fuel regrowth after cutting, gentle enough that the leaves stay aromatic rather than watery.
What does over-feeding tutsan 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 tutsan 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 tutsan?
Pot-grown tutsan 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
- Tutsan care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water tutsan — 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 pelargonium 'lara starshine'
- How to fertilise pelargonium graveolens 'attar of roses'
- How to fertilise pelargonium graveolens 'grey lady plymouth'
- All 8452 fertilising guides in the Growli library