Fertilising guide

How to fertilise Burnet Rose (Rosa pimpinellifolia)— schedule & NPK

Also called Burnet Rose, Scotch Rose, Pimpinel Rose, Bibernell Rose.

More about burnet rose

About Burnet Rose

Rosa pimpinellifolia · also called Burnet Rose, Scotch Rose · flowering

Rosa pimpinellifolia (syn. Rosa spinosissima) is a compact, very thorny, suckering species rose native to sand dunes, chalk grassland and moorland across Europe and western Asia, bearing a profusion of creamy-white, lightly fragrant single flowers in late spring followed by distinctive dark-maroon to near-black rounded hips. It is one of the hardiest rose species in cultivation, tolerating coastal exposure, poor sandy soils and intense frost. The most important care fact is to give it ample space as it spreads vigorously by suckers. Rosa is listed as non-toxic to cats, dogs and horses by the ASPCA.

Growth habit: Compact, densely suckering deciduous shrub with numerous very thorny, bristly stems, small pinnate leaves similar to burnet (Sanguisorba), once-flowering in late spring–early summer, then carrying hips through autumn.

What fertiliser burnet rose actually wants — and why

Burnet Rose is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom.

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 burnet rose: 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 burnet rose, 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 burnet rose:

Needs little feeding; excess nitrogen on naturally infertile soils weakens the habit and reduces flowering. An optional light dressing of balanced granular fertiliser in early spring, or a mulch of garden compost, is sufficient. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

The dormant-season rule matters more than the exact interval: skip feeding entirely when burnet rose 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 burnet rose

Follow the flowering-feed label rate for burnet rose, or half strength if feeding very frequently. These plants genuinely use the nutrients — under-feeding shows up fast as a thin display.

Feeding always goes onto already-damp soil, never dry roots — water burnet rose first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the burnet rose watering schedule.

Signs you are over-feeding burnet rose

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for burnet rose:

Lots of lush leaves but few flowers (too much nitrogen).
Scorched leaf edges and salt crust from too-strong or too-frequent feeds.
Soft, sappy growth prone to aphids and mildew.

Signs you are under-feeding burnet rose

Sparse, small, short-lived flowers and pale foliage.
A tired plant that stops blooming early in the season.
Weak growth and poor repeat-flowering after the first flush.

If the symptoms point at watering, light or roots rather than nutrition, the full burnet rose care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Container-grown burnet rose accumulates feed salts fast with frequent feeding — water until it drains each time and flush pots with plain water every few weeks to prevent scorch.

Organic vs synthetic feeds for burnet rose

Organic options

A liquid comfrey or seaweed feed (naturally potassium-rich) plus compost or well-rotted manure as a mulch. UK: comfrey feed, organic Tomorite, or rose feed; US: Espoma Rose-tone or Neptune's Harvest. Feeds and improves soil.

Synthetic / liquid feeds

A high-potash flowering feed on a regular cadence — UK: Tomorite (Levington), Phostrogen or a specialist rose feed; US: Miracle-Gro Bloom Booster or a rose food. Fast, reliable bloom response.

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 burnet rose — frequently asked questions

What fertiliser does burnet rose need?

A high-potassium ("high-potash") flowering feed — tomato-style or a dedicated bloom/rose feed. Potassium powers flowering; a high-nitrogen feed gives you a leafy plant with disappointing bloom. Burnet Rose is a heavy-blooming flower with a big appetite — a regular high-potash feed through the season is what drives a long, dense display.

How often should I feed burnet rose?

Needs little feeding; excess nitrogen on naturally infertile soils weakens the habit and reduces flowering. An optional light dressing of balanced granular fertiliser in early spring, or a mulch of garden compost, is sufficient. Needs little feeding; excess nitrogen on naturally infertile soils weakens the habit and reduces flowering. An optional light dressing of balanced granular fertiliser in early spring, or a mulch of garden compost, is sufficient. For a hungry bloomer that means feeding regularly — sparingly through the growing season — right through flowering across the main season (spring through early autumn), tapering as blooming ends.

What strength of feed for burnet rose?