Fertilising guide
How to fertilise Spathiphyllum 'Mauna Loa' (Spathiphyllum 'Mauna Loa')— schedule & NPK
Also called Mauna Loa peace lily, peace lily.
More about spathiphyllum 'mauna loa'
About Spathiphyllum 'Mauna Loa'
Spathiphyllum 'Mauna Loa' · also called Mauna Loa peace lily, peace lily · tropical
'Mauna Loa' is a large-flowered peace lily prized for glossy lance-shaped leaves and tall white spathes. It thrives in medium to bright indirect light, evenly moist soil, and warm humid rooms. The plant dramatically droops when thirsty and revives within hours of watering, making it forgiving for beginners.
Growth habit: Clump-forming evergreen perennial with arching basal foliage and upright flower spikes. 'Mauna Loa' is one of the larger, more vigorous cultivars, spreading by offsets to form a dense rosette of leaves.
Watch for — Brown leaf tips: Caused by low humidity, fluoride/chlorine in tap water, or over-fertilising. Use filtered or rested water, raise humidity and dilute feed.
What fertiliser spathiphyllum 'mauna loa' actually wants — and why
Spathiphyllum 'Mauna Loa' 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 spathiphyllum 'mauna loa': 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 spathiphyllum 'mauna loa', 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 spathiphyllum 'mauna loa':
Feed every 6-8 weeks in spring and summer with a balanced liquid houseplant fertiliser diluted to half strength. Over-feeding causes leaf-tip burn and discourages flowering. Stop or reduce feeding in autumn and winter while growth slows. Treat that as every 6-8 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 spathiphyllum 'mauna loa' 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 spathiphyllum 'mauna loa'
Half strength is the safe default for spathiphyllum 'mauna loa' — 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 spathiphyllum 'mauna loa' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the spathiphyllum 'mauna loa' watering schedule.
Signs you are over-feeding spathiphyllum 'mauna loa'
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for spathiphyllum 'mauna loa':
- 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 spathiphyllum 'mauna loa'
- 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 spathiphyllum 'mauna loa' care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of spathiphyllum 'mauna loa' 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 spathiphyllum 'mauna loa'
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 spathiphyllum 'mauna loa' — frequently asked questions
What fertiliser does spathiphyllum 'mauna loa' 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. Spathiphyllum 'Mauna Loa' 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 spathiphyllum 'mauna loa'?
Feed every 6-8 weeks in spring and summer with a balanced liquid houseplant fertiliser diluted to half strength. Over-feeding causes leaf-tip burn and discourages flowering. Stop or reduce feeding in autumn and winter while growth slows. Feed every 6-8 weeks in spring and summer with a balanced liquid houseplant fertiliser diluted to half strength. Over-feeding causes leaf-tip burn and discourages flowering. Stop or reduce feeding in autumn and winter while growth slows. Treat that as every 6-8 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 spathiphyllum 'mauna loa'?
Half strength is the safe default for spathiphyllum 'mauna loa' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding spathiphyllum 'mauna loa' 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 spathiphyllum 'mauna loa' 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 spathiphyllum 'mauna loa'?
Flush the pot of spathiphyllum 'mauna loa' 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
- Spathiphyllum 'Mauna Loa' care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water spathiphyllum 'mauna loa' — 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 2464 fertilising guides in the Growli library