Fertilising guide
How to fertilise Catasetum macrocarpum (Catasetum macrocarpum)— schedule & NPK
Also called Large-fruited Catasetum, Jumping Orchid.
More about catasetum macrocarpum
About Catasetum macrocarpum
Catasetum macrocarpum · also called Large-fruited Catasetum, Jumping Orchid · tropical
Catasetum macrocarpum is a dramatic South American epiphyte with a strict deciduous cycle: it grows fast and wet in summer, then drops its leaves and rests bone-dry in winter. Male flowers fire pollinia at insects with a triggered snap. It demands bright light, heavy growing-season feeding and water, then a near-complete dry dormancy.
Growth habit: Sympodial deciduous epiphyte with stout, spindle-shaped pseudobulbs bearing large pleated leaves that are shed annually; spikes can carry separate male or female flowers depending on light and culture.
Watch for — Weak or no blooming: Insufficient light or under-feeding in summer yields small pseudobulbs that won't flower. Grow it bright and feed it heavily while in leaf.
What fertiliser catasetum macrocarpum actually wants — and why
Catasetum macrocarpum 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 catasetum macrocarpum: 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 catasetum macrocarpum, 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 catasetum macrocarpum:
Feed heavily during active growth: a higher-nitrogen orchid fertiliser at half strength weekly early in the season, shifting to balanced feed as pseudobulbs mature, then stopping completely at dormancy. Catasetums are hungry growers and reward generous feeding. Treat that as weekly 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 catasetum macrocarpum 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 catasetum macrocarpum
Half strength is the safe default for catasetum macrocarpum — 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 catasetum macrocarpum first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the catasetum macrocarpum watering schedule.
Signs you are over-feeding catasetum macrocarpum
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for catasetum macrocarpum:
- 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 catasetum macrocarpum
- 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 catasetum macrocarpum care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of catasetum macrocarpum 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 catasetum macrocarpum
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 catasetum macrocarpum — frequently asked questions
What fertiliser does catasetum macrocarpum 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. Catasetum macrocarpum 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 catasetum macrocarpum?
Feed heavily during active growth: a higher-nitrogen orchid fertiliser at half strength weekly early in the season, shifting to balanced feed as pseudobulbs mature, then stopping completely at dormancy. Catasetums are hungry growers and reward generous feeding. Feed heavily during active growth: a higher-nitrogen orchid fertiliser at half strength weekly early in the season, shifting to balanced feed as pseudobulbs mature, then stopping completely at dormancy. Catasetums are hungry growers and reward generous feeding. Treat that as weekly 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 catasetum macrocarpum?
Half strength is the safe default for catasetum macrocarpum — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding catasetum macrocarpum 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 catasetum macrocarpum 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 catasetum macrocarpum?
Flush the pot of catasetum macrocarpum 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
- Catasetum macrocarpum care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water catasetum macrocarpum — 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 monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 5561 fertilising guides in the Growli library