Fertilising guide
How to fertilise Aglaonema Modestum (Aglaonema modestum)— schedule & NPK
Also called Chinese Evergreen, Painted Drop-Tongue Species.
More about aglaonema modestum
About Aglaonema Modestum
Aglaonema modestum · also called Chinese Evergreen, Painted Drop-Tongue Species · houseplant
Aglaonema modestum is the original Chinese evergreen, a hardy species with plain, glossy deep-green oval leaves on slender stems. Cultivated in China for centuries as a symbol of good fortune, it is among the most shade-tolerant and forgiving of all houseplants, thriving in dim corners, tolerating neglect, and purifying indoor air with minimal fuss.
Growth habit: Upright, clump-forming species that develops slender cane-like stems over time and produces basal shoots, eventually becoming somewhat leggy.
Watch for — Brown leaf tips: Dry air or salt and fluoride in tap water. Flush the soil occasionally and switch to filtered or rainwater.
What fertiliser aglaonema modestum actually wants — and why
Aglaonema Modestum 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 aglaonema modestum: 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 aglaonema modestum, 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 aglaonema modestum:
Feed monthly in spring and summer with a balanced liquid houseplant fertiliser at half strength. This undemanding species needs little feeding; stop in autumn and winter. 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 aglaonema modestum 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 aglaonema modestum
Half strength is the safe default for aglaonema modestum — 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 aglaonema modestum first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the aglaonema modestum watering schedule.
Signs you are over-feeding aglaonema modestum
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for aglaonema modestum:
- 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 aglaonema modestum
- 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 aglaonema modestum care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of aglaonema modestum 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 aglaonema modestum
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 aglaonema modestum — frequently asked questions
What fertiliser does aglaonema modestum 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. Aglaonema Modestum 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 aglaonema modestum?
Feed monthly in spring and summer with a balanced liquid houseplant fertiliser at half strength. This undemanding species needs little feeding; stop in autumn and winter. Feed monthly in spring and summer with a balanced liquid houseplant fertiliser at half strength. This undemanding species needs little feeding; stop in autumn and winter. 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 aglaonema modestum?
Half strength is the safe default for aglaonema modestum — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding aglaonema modestum 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 aglaonema modestum 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 aglaonema modestum?
Flush the pot of aglaonema modestum 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
- Aglaonema Modestum care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water aglaonema modestum — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 3899 fertilising guides in the Growli library