Fertilising guide

How to fertilise Lingonberry 'Koralle' (Vaccinium vitis-idaea 'Koralle')— schedule & NPK

Also called Koralle lingonberry.

More about lingonberry 'koralle'

About Lingonberry 'Koralle'

Vaccinium vitis-idaea 'Koralle' · also called Koralle lingonberry · edible

'Koralle' is a heavy-cropping, ornamental lingonberry cultivar from the Netherlands, valued for abundant glossy red berries and a compact, tidy habit. Like the species it is a low evergreen subshrub needing acidic, peaty, free-draining soil and cool conditions. It is self-fertile and typically fruits twice, in summer and again in autumn.

Growth habit: Compact, mat-forming evergreen subshrub spreading by rhizomes; denser and more uniformly fruitful than the wild species, ideal as edible groundcover or in pots.

What fertiliser lingonberry 'koralle' actually wants — and why

Lingonberry 'Koralle' is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.

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 lingonberry 'koralle': 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 lingonberry 'koralle', 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 lingonberry 'koralle':

Feed lightly in spring with a dilute ericaceous fertiliser. Avoid lime and heavy nitrogen, which harm the roots; this cultivar fruits well on lean, acidic soil with minimal feeding. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.

The dormant-season rule matters more than the exact interval: skip feeding entirely when lingonberry 'koralle' 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 lingonberry 'koralle'

Follow the ericaceous product's own rate — these are formulated for the plant, so the dilution on the label is right for lingonberry 'koralle'. The variable that actually matters is pH, not concentration.

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

Signs you are over-feeding lingonberry 'koralle'

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

Brown, scorched leaf margins from too strong or too frequent a dose.
White salt crust on the soil surface.
Soft, lush growth that fruits or flowers poorly.

Signs you are under-feeding lingonberry 'koralle'

Yellowing leaves with green veins (iron chlorosis from high pH).
Weak growth, poor cropping and an overall pale, stressed look.
Stunted new shoots in spring despite adequate water and light.

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

Flushing and leaching the salts

Flush lingonberry 'koralle' with rainwater (not hard tap water, which raises pH) if salts build up; better still, mulch with pine needles or composted bark and water with rainwater to hold the acidity.

Organic vs synthetic feeds for lingonberry 'koralle'

Organic options

Composted pine bark, pine-needle mulch, used coffee grounds and an organic ericaceous feed gently maintain acidity. UK: Vitax or Westland Ericaceous; US: Espoma Holly-tone or Dr. Earth Acid Lovers. Slow, soil-improving, hard to overdo.

Synthetic / liquid feeds

A liquid or granular ericaceous feed — UK: Miracle-Gro Ericaceous, Vitax or Westland; US: Miracle-Gro Acid-Loving Plant Food or Espoma Holly-tone. Pair with rainwater and an acidic mulch for it to work.

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 lingonberry 'koralle' — frequently asked questions

What fertiliser does lingonberry 'koralle' need?

An ericaceous (acidic) fertiliser, formulated to keep the soil pH low and supply iron and trace elements in a form acid-loving roots can absorb. Ordinary feeds and any lime lock out iron and yellow the leaves. Lingonberry 'Koralle' is an acid-loving plant — it can only take up nutrients in acidic soil, so the feed itself matters less than using an ericaceous formula and never liming.

How often should I feed lingonberry 'koralle'?

Feed lightly in spring with a dilute ericaceous fertiliser. Avoid lime and heavy nitrogen, which harm the roots; this cultivar fruits well on lean, acidic soil with minimal feeding. Feed lightly in spring with a dilute ericaceous fertiliser. Avoid lime and heavy nitrogen, which harm the roots; this cultivar fruits well on lean, acidic soil with minimal feeding. In practice: an ericaceous feed in spring as growth resumes, repeated through the main growing months; never apply lime, bonemeal or wood ash, which raise pH.

What strength of feed for lingonberry 'koralle'?

What does over-feeding lingonberry 'koralle' look like?

Brown, scorched leaf margins from too strong or too frequent a dose. White salt crust on the soil surface. Soft, lush growth that fruits or flowers poorly. Feeding lingonberry 'koralle' an ordinary fertiliser, or growing it in hard tap water / limey soil, is the defining mistake — it triggers lime-induced chlorosis (yellow leaves, green veins) no amount of feeding fixes until the pH comes down.

Should I flush the soil of lingonberry 'koralle'?