Fertilising guide
How to fertilise Bleeding Heart (Lamprocapnos spectabilis)— schedule & NPK
Also called Bleeding heart, Old-fashioned bleeding heart.
More about bleeding heart
About Bleeding Heart
Lamprocapnos spectabilis · also called Bleeding heart, Old-fashioned bleeding heart · flowering
Old-fashioned bleeding heart is a graceful shade perennial that hangs rows of heart-shaped pink-and-white lockets along arching stems in late spring. Fully hardy and easy in moist woodland soil, it often goes summer-dormant in heat, dying back after flowering. Its ferny foliage and pendant blooms make it a cottage-garden favourite for cool, partly shaded borders.
Growth habit: Clump-forming herbaceous perennial with arching flower stems above ferny foliage; flowers in late spring, then frequently dies back to the ground in summer (summer dormancy), re-emerging the following spring.
What fertiliser bleeding heart actually wants — and why
Bleeding Heart 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 bleeding heart: 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 bleeding heart, 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 bleeding heart:
Top-dress with compost or leaf mould in spring and again as growth emerges. A light balanced feed in spring is ample; it is not a heavy feeder and over-fertilising is unnecessary. Avoid disturbing the brittle roots when mulching. 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 bleeding heart 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 bleeding heart
Half strength is the safe default for bleeding heart — 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 bleeding heart first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the bleeding heart watering schedule.
Signs you are over-feeding bleeding heart
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for bleeding heart:
- 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 bleeding heart
- 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 bleeding heart care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of bleeding heart 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 bleeding heart
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 bleeding heart — frequently asked questions
What fertiliser does bleeding heart 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. Bleeding Heart 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 bleeding heart?
Top-dress with compost or leaf mould in spring and again as growth emerges. A light balanced feed in spring is ample; it is not a heavy feeder and over-fertilising is unnecessary. Avoid disturbing the brittle roots when mulching. Top-dress with compost or leaf mould in spring and again as growth emerges. A light balanced feed in spring is ample; it is not a heavy feeder and over-fertilising is unnecessary. Avoid disturbing the brittle roots when mulching. 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 bleeding heart?
Half strength is the safe default for bleeding heart — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding bleeding heart 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 bleeding heart 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 bleeding heart?
Flush the pot of bleeding heart 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
- Bleeding Heart care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water bleeding heart — 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 peace lily
- How to fertilise bird of paradise
- How to fertilise hoya
- All 2464 fertilising guides in the Growli library