Fertilising guide

How to fertilise Masdevallia coccinea (Masdevallia coccinea)— schedule & NPK

Also called Scarlet Masdevallia, Colombian Masdevallia.

More about masdevallia coccinea

About Masdevallia coccinea

Masdevallia coccinea · also called Scarlet Masdevallia, Colombian Masdevallia · tropical

Masdevallia coccinea is a striking Andean cloud-forest orchid from Colombia and Peru, sending tall slender stems above the foliage topped with large triangular flowers in magenta, scarlet, white or yellow forms. Cool-growing and tuft-forming, it needs cool nights, steady moisture and high humidity, making it a connoisseur's windowsill or greenhouse plant.

Growth habit: Caespitose epiphyte forming tufts of leathery, paddle-shaped leaves; tall, slender single-flowered stems rise well above the foliage, unusual for the genus. Clumps up steadily with good culture.

Watch for — Salt/leaf-tip burn: Black leaf tips indicate mineral accumulation or low humidity; water with RO or rainwater and flush the medium regularly.

What fertiliser masdevallia coccinea actually wants — and why

Masdevallia coccinea is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.

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 masdevallia coccinea: 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 masdevallia coccinea, 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 masdevallia coccinea:

Feed weakly, weekly with a quarter- to half-strength balanced orchid fertiliser during active growth, flushing with plain low-mineral water between applications to avoid the salt build-up these sensitive roots react badly to. The pattern that matters: feed little and often through active growth and budding — weekly — and ease right off during the rest period that triggers the next flush.

The dormant-season rule matters more than the exact interval: skip feeding entirely when masdevallia coccinea 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 masdevallia coccinea

Very dilute — quarter strength, the classic "weakly, weekly" approach for masdevallia coccinea. These plants have fine roots that scorch easily and a steady trickle beats an occasional strong dose for flowering.

Feeding always goes onto already-damp soil, never dry roots — water masdevallia coccinea first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the masdevallia coccinea watering schedule.

Signs you are over-feeding masdevallia coccinea

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for masdevallia coccinea:

Lush green leaves but few or no flowers (too much nitrogen).
Brown, scorched leaf tips and edges — a classic fine-root burn.
White salt crust on the medium or pot, and stalled buds.
Bud blast: buds forming then shrivelling and dropping.

Signs you are under-feeding masdevallia coccinea

Sparse or no flowering despite good light and the right season.
Smaller, paler new leaves and a generally weak, tired plant.
Flowers that are smaller or fade faster than they should.

If the symptoms point at watering, light or roots rather than nutrition, the full masdevallia coccinea care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Specialist and bloom feeds leave salts that scorch fine roots — flush masdevallia coccinea thoroughly with plain water until it runs clear every 4-6 weeks in the feeding season, and always between feeds for orchids.

Organic vs synthetic feeds for masdevallia coccinea

Organic options

Gentler options exist: a dilute seaweed feed (mildly potassium-rich) or worm-casting tea. UK: Westland seaweed, or a dilute tomato feed like Tomorite for bud-formers; US: Espoma Orchid! / Violet! or Neptune's Harvest. Lower burn risk, slower response.

Synthetic / liquid feeds

A species-matched bloom feed at quarter strength — UK: Baby Bio Orchid / African Violet food, or a high-potash Tomorite/Phostrogen for budding bloomers; US: Miracle-Gro Orchid or Bloom Booster, Schultz African Violet.

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 masdevallia coccinea — frequently asked questions

What fertiliser does masdevallia coccinea need?

A higher-phosphorus "bloom" formula or a species-specific feed (orchid food, African violet food, or a tomato-style high-potash/phosphorus liquid). A high-nitrogen general feed gives you lush leaves and almost no flowers. Masdevallia coccinea is feeding to flower, not to grow leaves — it needs a higher-phosphorus / specialist bloom feed, given little and often, to set and hold its display.

How often should I feed masdevallia coccinea?

Feed weakly, weekly with a quarter- to half-strength balanced orchid fertiliser during active growth, flushing with plain low-mineral water between applications to avoid the salt build-up these sensitive roots react badly to. Feed weakly, weekly with a quarter- to half-strength balanced orchid fertiliser during active growth, flushing with plain low-mineral water between applications to avoid the salt build-up these sensitive roots react badly to. The pattern that matters: feed little and often through active growth and budding — weekly — and ease right off during the rest period that triggers the next flush.

What strength of feed for masdevallia coccinea?

What does over-feeding masdevallia coccinea look like?

Lush green leaves but few or no flowers (too much nitrogen). Brown, scorched leaf tips and edges — a classic fine-root burn. White salt crust on the medium or pot, and stalled buds. Bud blast: buds forming then shrivelling and dropping. Using an ordinary high-nitrogen houseplant feed on masdevallia coccinea is the headline mistake — you get a healthy-looking plant that simply refuses to bloom. The second is feeding through the rest period and breaking the dormancy cue it needs to set buds.

Should I flush the soil of masdevallia coccinea?