Fertilising guide
How to fertilise Hedgerow Cranesbill (Geranium pyrenaicum)— schedule & NPK
Also called Hedgerow Cranesbill, Mountain Cranesbill, Pyrenean Cranesbill.
More about hedgerow cranesbill
About Hedgerow Cranesbill
Geranium pyrenaicum · also called Hedgerow Cranesbill, Mountain Cranesbill · flowering
Geranium pyrenaicum is a clump-forming, semi-evergreen herbaceous perennial native to southern Europe and western Asia, now widely naturalised in the UK and northern Europe along roadsides, hedgerows, meadows and open woodland edges. Unlike most of the annual cranesbills in this group, it returns reliably year after year and self-seeds freely around the parent plant, producing a long succession of small purplish-pink flowers from late spring through to early autumn. It is undemanding, tolerating a wide range of soils in full sun to partial shade. True cranesbill Geranium species are not listed as toxic to pets by the ASPCA, and this species is considered non-toxic to cats and dogs.
Growth habit: Clump-forming, semi-evergreen perennial with lobed, dark green basal leaves; produces upright then sprawling branching flower stems that self-seed freely around the parent clump.
What fertiliser hedgerow cranesbill actually wants — and why
Hedgerow 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 hedgerow 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 hedgerow 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 hedgerow cranesbill:
Feed sparingly, if at all — a light top-dressing of balanced fertiliser in early spring can support vigorous clumps, but high-nitrogen feeds promote leafy growth at the expense of the long flowering period. 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 hedgerow 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 hedgerow cranesbill
Half strength is the safe default for hedgerow 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 hedgerow cranesbill first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the hedgerow cranesbill watering schedule.
Signs you are over-feeding hedgerow cranesbill
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for hedgerow 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 hedgerow 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 hedgerow cranesbill care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of hedgerow 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 hedgerow 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 hedgerow cranesbill — frequently asked questions
What fertiliser does hedgerow 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. Hedgerow 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 hedgerow cranesbill?
Feed sparingly, if at all — a light top-dressing of balanced fertiliser in early spring can support vigorous clumps, but high-nitrogen feeds promote leafy growth at the expense of the long flowering period. Feed sparingly, if at all — a light top-dressing of balanced fertiliser in early spring can support vigorous clumps, but high-nitrogen feeds promote leafy growth at the expense of the long flowering period. 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 hedgerow cranesbill?
Half strength is the safe default for hedgerow cranesbill — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding hedgerow 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 hedgerow 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 hedgerow cranesbill?
Flush the pot of hedgerow 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
- Hedgerow Cranesbill care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water hedgerow 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 peony lotus
- How to fertilise giant sunburst lotus
- How to fertilise crested floating heart
- All 10153 fertilising guides in the Growli library