Fertilising guide
How to fertilise Spathoglottis kimballiana (Spathoglottis kimballiana)— schedule & NPK
Also called Kimball's Spathoglottis, Yellow Ground Orchid.
More about spathoglottis kimballiana
About Spathoglottis kimballiana
Spathoglottis kimballiana · also called Kimball's Spathoglottis, Yellow Ground Orchid · tropical
Spathoglottis kimballiana is a warm-growing Southeast Asian terrestrial orchid bearing bright golden-yellow flowers above pleated, grassy leaves. Less common than the purple Philippine ground orchid, it shares the same easy terrestrial culture: partial shade, warmth, steady moisture and a rich, well-drained mix. Given consistent warmth and humidity it flowers freely over a long season.
Growth habit: Evergreen sympodial terrestrial with clustered above-ground pseudobulbs and tall, pleated, grass-like leaves; erect spikes carry successive bright-yellow flowers over a long blooming period.
What fertiliser spathoglottis kimballiana actually wants — and why
Spathoglottis kimballiana 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 spathoglottis kimballiana: 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 spathoglottis kimballiana, 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 spathoglottis kimballiana:
Feed regularly during active growth with a balanced orchid or general liquid fertiliser at half strength every 1-2 weeks, or a slow-release granular product. Favour higher nitrogen for leaf growth and reduce feeding in cooler months. Treat that as every 1-2 weeks 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 spathoglottis kimballiana 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 spathoglottis kimballiana
Half strength is the safe default for spathoglottis kimballiana — 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 spathoglottis kimballiana first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the spathoglottis kimballiana watering schedule.
Signs you are over-feeding spathoglottis kimballiana
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for spathoglottis kimballiana:
- 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 spathoglottis kimballiana
- 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 spathoglottis kimballiana care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of spathoglottis kimballiana 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 spathoglottis kimballiana
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 spathoglottis kimballiana — frequently asked questions
What fertiliser does spathoglottis kimballiana 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. Spathoglottis kimballiana 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 spathoglottis kimballiana?
Feed regularly during active growth with a balanced orchid or general liquid fertiliser at half strength every 1-2 weeks, or a slow-release granular product. Favour higher nitrogen for leaf growth and reduce feeding in cooler months. Feed regularly during active growth with a balanced orchid or general liquid fertiliser at half strength every 1-2 weeks, or a slow-release granular product. Favour higher nitrogen for leaf growth and reduce feeding in cooler months. Treat that as every 1-2 weeks 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 spathoglottis kimballiana?
Half strength is the safe default for spathoglottis kimballiana — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding spathoglottis kimballiana 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 spathoglottis kimballiana 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 spathoglottis kimballiana?
Flush the pot of spathoglottis kimballiana 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
- Spathoglottis kimballiana care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water spathoglottis kimballiana — 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