Fertilising guide
How to fertilise White Temple Bells (Smithiantha multiflora)— schedule & NPK
Also called Temple Bells, White Smithiantha.
More about white temple bells
About White Temple Bells
Smithiantha multiflora · also called Temple Bells, White Smithiantha · houseplant
White Temple Bells is a Mexican gesneriad that produces cascading tubular white flowers above velvety, heart-shaped leaves. It grows from rhizomes, dies back in winter, and re-emerges in spring. Ideal for bright indoor spots with high humidity. As a gesneriad, it is considered pet-safe based on ASPCA guidance for the broader family.
Growth habit: Rhizomatous perennial with seasonal dormancy
What fertiliser white temple bells actually wants — and why
White Temple Bells 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 white temple bells: 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 white temple bells, 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 white temple bells:
During active growth (spring through early autumn), apply a half-strength balanced liquid fertiliser every 2-3 weeks. Switch to a high-phosphorus feed when flower buds form to extend the display. Do not feed dormant plants. Treat that as every 2-3 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 white temple bells 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 white temple bells
Half strength is the safe default for white temple bells — 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 white temple bells first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the white temple bells watering schedule.
Signs you are over-feeding white temple bells
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for white temple bells:
- 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 white temple bells
- 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 white temple bells care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of white temple bells 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 white temple bells
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 white temple bells — frequently asked questions
What fertiliser does white temple bells 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. White Temple Bells 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 white temple bells?
During active growth (spring through early autumn), apply a half-strength balanced liquid fertiliser every 2-3 weeks. Switch to a high-phosphorus feed when flower buds form to extend the display. Do not feed dormant plants. During active growth (spring through early autumn), apply a half-strength balanced liquid fertiliser every 2-3 weeks. Switch to a high-phosphorus feed when flower buds form to extend the display. Do not feed dormant plants. Treat that as every 2-3 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 white temple bells?
Half strength is the safe default for white temple bells — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding white temple bells 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 white temple bells 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 white temple bells?
Flush the pot of white temple bells 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
- White Temple Bells care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water white temple bells — 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 rhombus-leaf peperomia
- How to fertilise hay-scented buckler fern
- How to fertilise shaggy wood fern
- All 11687 fertilising guides in the Growli library