Fertilising guide
How to fertilise Saucer Plant (Aeonium undulatum)— schedule & NPK
Also called Dinner Plate Aeonium.
More about saucer plant
About Saucer Plant
Aeonium undulatum · also called Dinner Plate Aeonium · houseplant
Aeonium undulatum is a tall, single-stemmed succulent forming a large glossy rosette of spoon-shaped green leaves atop a bare woody trunk. Unlike most aeoniums it rarely branches. It grows in winter and goes semi-dormant in hot, dry summers, so its watering rhythm is the reverse of typical houseplants. Give bright light and very sharp drainage.
Growth habit: Erect, usually unbranched succulent with a thick woody stem topped by a single large terminal rosette. Mature plants may produce a tall conical panicle of yellow flowers, after which that rosette dies (it is monocarpic).
What fertiliser saucer plant actually wants — and why
Saucer Plant 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 saucer plant: 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 saucer plant, 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 saucer plant:
Feed monthly with a half-strength balanced liquid fertiliser during active growth in autumn through spring. Stop feeding entirely during summer dormancy. Aeoniums are light feeders and excess nitrogen produces weak, stretched growth. 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 saucer plant 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 saucer plant
Half strength is the safe default for saucer plant — 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 saucer plant first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the saucer plant watering schedule.
Signs you are over-feeding saucer plant
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for saucer plant:
- 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 saucer plant
- 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 saucer plant care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of saucer plant 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 saucer plant
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 saucer plant — frequently asked questions
What fertiliser does saucer plant 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. Saucer Plant 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 saucer plant?
Feed monthly with a half-strength balanced liquid fertiliser during active growth in autumn through spring. Stop feeding entirely during summer dormancy. Aeoniums are light feeders and excess nitrogen produces weak, stretched growth. Feed monthly with a half-strength balanced liquid fertiliser during active growth in autumn through spring. Stop feeding entirely during summer dormancy. Aeoniums are light feeders and excess nitrogen produces weak, stretched growth. 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 saucer plant?
Half strength is the safe default for saucer plant — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding saucer plant 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 saucer plant 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 saucer plant?
Flush the pot of saucer plant 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
- Saucer Plant care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water saucer plant — 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 1284 fertilising guides in the Growli library