Fertilising guide
How to fertilise Large-Leaf Lycaste (Lycaste macrophylla)— schedule & NPK
Also called Large-Leaf Lycaste, Big-Leaf Lycaste.
More about large-leaf lycaste
About Large-Leaf Lycaste
Lycaste macrophylla · also called Large-Leaf Lycaste, Big-Leaf Lycaste · tropical
Lycaste macrophylla is a robust cool-to-warm epiphyte from montane cloud forests across Central and South America, growing at 400–2,400 m. Its exceptionally large pleated leaves earn it the species name. Fragrant greenish-white to pinkish flowers appear on multiple scapes in spring. Needs high humidity, intermediate temperatures, and a seasonal watering reduction.
Growth habit: Sympodial epiphyte or lithophyte with large, angular pseudobulbs bearing 2–4 very broad pleated leaves that can reach 60–80 cm. Produces several single-flowered scapes per pseudobulb simultaneously. Partly deciduous in cultivation.
What fertiliser large-leaf lycaste actually wants — and why
Large-Leaf Lycaste 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 large-leaf lycaste: 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 large-leaf lycaste, 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 large-leaf lycaste:
Feed every 7–10 days at quarter-strength with a balanced orchid fertiliser during active growth. Switch to a lower-nitrogen bloom booster in early autumn. Cease or minimise feeding in winter when growth slows. Flush with clean water monthly. Treat that as monthly 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 large-leaf lycaste 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 large-leaf lycaste
Half strength is the safe default for large-leaf lycaste — 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 large-leaf lycaste first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the large-leaf lycaste watering schedule.
Signs you are over-feeding large-leaf lycaste
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for large-leaf lycaste:
- 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 large-leaf lycaste
- 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 large-leaf lycaste care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of large-leaf lycaste 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 large-leaf lycaste
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 large-leaf lycaste — frequently asked questions
What fertiliser does large-leaf lycaste 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. Large-Leaf Lycaste 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 large-leaf lycaste?
Feed every 7–10 days at quarter-strength with a balanced orchid fertiliser during active growth. Switch to a lower-nitrogen bloom booster in early autumn. Cease or minimise feeding in winter when growth slows. Flush with clean water monthly. Feed every 7–10 days at quarter-strength with a balanced orchid fertiliser during active growth. Switch to a lower-nitrogen bloom booster in early autumn. Cease or minimise feeding in winter when growth slows. Flush with clean water monthly. Treat that as monthly 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 large-leaf lycaste?
Half strength is the safe default for large-leaf lycaste — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding large-leaf lycaste 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 large-leaf lycaste 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 large-leaf lycaste?
Flush the pot of large-leaf lycaste 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
- Large-Leaf Lycaste care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water large-leaf lycaste — 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 nude sheath bamboo
- How to fertilise white-powder bamboo
- How to fertilise red margin bamboo
- All 8452 fertilising guides in the Growli library