Fertilising guide
How to fertilise Pink Penny Cranesbill (Geranium 'Pink Penny')— schedule & NPK
Also called Pink Penny Cranesbill, Hardy Geranium 'Pink Penny'.
More about pink penny cranesbill
About Pink Penny Cranesbill
Geranium 'Pink Penny' · also called Pink Penny Cranesbill, Hardy Geranium 'Pink Penny' · flowering
Geranium 'Pink Penny' (PP17656) is a compact, semi-evergreen cranesbill that originated as a mutation of Geranium 'Jolly Bee', selected by Dutch nurseryman Marco van Noort. It bears a near-continuous flush of bright pink, saucer-shaped flowers with a paler centre and dark purple veins and anthers from early summer until the first hard frosts, and the sterile blooms are self-cleaning so no deadheading is required. The single most critical care requirement is a well-drained site in sun, as the plant dislikes sitting in wet soil over winter. True cranesbill Geranium species are not listed as toxic by the ASPCA (which classifies Pelargonium as the toxic 'Geranium') and are widely considered pet-safe.
Growth habit: Compact, mound-forming semi-evergreen perennial with fragrant, spotted bright-green foliage.
Watch for — Vine weevil: Root-feeding grubs cause sudden wilting and plant death, particularly in containers or sandy soils; apply biological control nematodes (Steinernema kraussei) in late August to early September while soil is above 5 °C.
What fertiliser pink penny cranesbill actually wants — and why
Pink Penny Cranesbill 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 pink penny cranesbill: 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 pink penny cranesbill, 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 pink penny cranesbill:
Apply a balanced granular or slow-release fertiliser in spring; avoid excess nitrogen which encourages leafy growth over flowers. Treat that as sparingly through the growing season 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 pink penny cranesbill 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 pink penny cranesbill
Half strength is the safe default for pink penny cranesbill — 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 pink penny cranesbill first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the pink penny cranesbill watering schedule.
Signs you are over-feeding pink penny cranesbill
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for pink penny cranesbill:
- 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 pink penny cranesbill
- 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 pink penny cranesbill care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of pink penny cranesbill 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 pink penny cranesbill
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 pink penny cranesbill — frequently asked questions
What fertiliser does pink penny cranesbill 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. Pink Penny Cranesbill 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 pink penny cranesbill?
Apply a balanced granular or slow-release fertiliser in spring; avoid excess nitrogen which encourages leafy growth over flowers. Apply a balanced granular or slow-release fertiliser in spring; avoid excess nitrogen which encourages leafy growth over flowers. Treat that as sparingly through the growing season 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 pink penny cranesbill?
Half strength is the safe default for pink penny cranesbill — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding pink penny cranesbill 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 pink penny cranesbill 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 pink penny cranesbill?
Flush the pot of pink penny cranesbill 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
- Pink Penny Cranesbill care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water pink penny cranesbill — 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 fritillaria meleagris
- How to fertilise clematis 'nelly moser'
- How to fertilise clematis 'jackmanii'
- All 10153 fertilising guides in the Growli library