Fertilising guide
How to fertilise Swedish Ivy (Plectranthus verticillatus)— schedule & NPK
Also called Swedish ivy, Swedish begonia, creeping Charlie, whorled plectranthus.
More about swedish ivy
About Swedish Ivy
Plectranthus verticillatus · also called Swedish ivy, Swedish begonia · houseplant
Swedish ivy is a fast-growing, trailing member of the mint family (not a true ivy), prized as an easy, pet-safe houseplant for hanging baskets and shelves. Its one defining need is bright, indirect light with evenly moist but never soggy compost; direct sun scorches its glossy, scalloped leaves and waterlogging rots its shallow roots.
Growth habit: A vigorous, mounding-then-trailing evergreen perennial with square mint-family stems and rounded, scalloped, glossy green leaves that release a faint scent when brushed. Indoors it spills attractively from hanging baskets and shelves, spreading roughly 0.5-1 m, and produces small tubular white or pale-purple flowers intermittently.
Watch for — Spider mites: Show as pale, stippled leaves with fine webbing, worse in hot, dry air. Rinse the foliage and treat with insecticidal soap, repeating after about a week.
What fertiliser swedish ivy actually wants — and why
Swedish Ivy 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 swedish ivy: 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 swedish ivy, 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 swedish ivy:
Feed with a balanced liquid houseplant fertiliser at half to full strength roughly monthly through spring and summer; stop feeding in autumn and winter when growth slows. If a mature plant refuses to flower, switching to a higher-phosphorus, lower-nitrogen feed and giving it brighter light can encourage the spikes of small white-to-pale-lilac blooms. 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 swedish ivy 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 swedish ivy
Half strength is the safe default for swedish ivy — 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 swedish ivy first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the swedish ivy watering schedule.
Signs you are over-feeding swedish ivy
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for swedish ivy:
- 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 swedish ivy
- 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 swedish ivy care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of swedish ivy 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 swedish ivy
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 swedish ivy — frequently asked questions
What fertiliser does swedish ivy 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. Swedish Ivy 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 swedish ivy?
Feed with a balanced liquid houseplant fertiliser at half to full strength roughly monthly through spring and summer; stop feeding in autumn and winter when growth slows. If a mature plant refuses to flower, switching to a higher-phosphorus, lower-nitrogen feed and giving it brighter light can encourage the spikes of small white-to-pale-lilac blooms. Feed with a balanced liquid houseplant fertiliser at half to full strength roughly monthly through spring and summer; stop feeding in autumn and winter when growth slows. If a mature plant refuses to flower, switching to a higher-phosphorus, lower-nitrogen feed and giving it brighter light can encourage the spikes of small white-to-pale-lilac blooms. 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 swedish ivy?
Half strength is the safe default for swedish ivy — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding swedish ivy 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 swedish ivy 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 swedish ivy?
Flush the pot of swedish ivy 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
- Swedish Ivy care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water swedish ivy — 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 271 fertilising guides in the Growli library