Fertilising guide
How to fertilise Strawberry Begonia (Saxifraga stolonifera)— schedule & NPK
Also called Strawberry Geranium, Creeping Saxifrage.
More about strawberry begonia
About Strawberry Begonia
Saxifraga stolonifera · also called Strawberry Geranium, Creeping Saxifrage · houseplant
Despite its name, Strawberry Begonia is neither a begonia nor a geranium but a saxifrage, grown for round, silver-veined hairy leaves and thread-like red runners that dangle baby plantlets like a strawberry. It tolerates cooler, lower-light spots than true begonias, makes a charming trailing or hanging plant, and is pet-safe.
Growth habit: Low rosette-forming groundcover that spreads by slender red stolons, each tipped with a new plantlet; trails attractively over pot edges and in hanging baskets.
Watch for — Crispy leaf edges: Browning margins indicate dry air, underwatering, or fertiliser salt build-up; keep evenly moist and flush the soil occasionally.
What fertiliser strawberry begonia actually wants — and why
Strawberry Begonia 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 strawberry begonia: 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 strawberry begonia, 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 strawberry begonia:
Feed monthly through spring and summer with a balanced houseplant fertiliser at half strength. Pause feeding 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 strawberry begonia 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 strawberry begonia
Half strength is the safe default for strawberry begonia — 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 strawberry begonia first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the strawberry begonia watering schedule.
Signs you are over-feeding strawberry begonia
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for strawberry begonia:
- 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 strawberry begonia
- 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 strawberry begonia care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of strawberry begonia 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 strawberry begonia
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 strawberry begonia — frequently asked questions
What fertiliser does strawberry begonia 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. Strawberry Begonia 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 strawberry begonia?
Feed monthly through spring and summer with a balanced houseplant fertiliser at half strength. Pause feeding in autumn and winter. Feed monthly through spring and summer with a balanced houseplant fertiliser at half strength. Pause feeding 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 strawberry begonia?
Half strength is the safe default for strawberry begonia — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding strawberry begonia 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 strawberry begonia 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 strawberry begonia?
Flush the pot of strawberry begonia 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
- Strawberry Begonia care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water strawberry begonia — 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