Repotting guide

When & how to repot Corsican Heath (Erica terminalis)

Also called Corsican Heath, Corsican Heather, Terminal Heath.

More about corsican heath

About Corsican Heath

Erica terminalis · also called Corsican Heath, Corsican Heather · flowering

A bushy, erect evergreen shrub native to Corsica, Sardinia, southern Spain, Italy, and Morocco, and long naturalised in parts of Northern Ireland, where it grows in rocky, sun-drenched scrubland on calcareous soils. It is distinctive for its terminal clusters of rose-pink, urn-shaped flowers produced in summer and early autumn, and for its persistent rusty-brown faded flowers that remain attractive through winter. Like Erica multiflora, it tolerates alkaline soils, making it valuable for lime-rich gardens. The most important care point is to site it in a warm, sheltered, freely draining position, as it is less cold-hardy than the mountain ericas. Erica terminalis is not confirmed by ASPCA as toxic or non-toxic; classified mildly-toxic as a precaution.

Mature size: 60–150 cm tall (24–60 in) with a spread of 60–100 cm (24–40 in).

Watch for — Phytophthora root rot: The primary threat, especially in heavier UK soils or wetter climates; affected plants wilt and die rapidly. Plant exclusively in sharp-draining soil, incorporate coarse grit on heavier ground, and avoid irrigating when rainfall is already adequate.

How to tell corsican heath needs repotting

Repotting on a calendar is less reliable than reading the plant. For corsican heath, watch for these signs:

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for corsican heath) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot corsican heath

Only every 2–4 years, when genuinely crowded. Corsican Heath is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Bushy, erect, well-branched evergreen shrub with mid-green needle-like foliage in whorls..

What size pot to step corsican heath up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Corsican Heath positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping corsican heath into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot corsican heath

Early spring, just as new growth restarts, is the ideal window for corsican heath. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting corsican heath

Confirm it actually needs it. Slide corsican heath out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip corsican heath out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh well-drained, alkaline to neutral (ph 6.5–8.0), set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water corsican heath again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for corsican heath

Corsican Heath wants well-drained, alkaline to neutral (ph 6.5–8.0). Tolerates alkaline and calcareous soils, distinguishing it from most acid-loving ericas; prefers moderately fertile, well-drained or sandy soil. Does not tolerate heavy clay or waterlogged conditions. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting corsican heath — frequently asked questions

How often should you repot corsican heath?

Only every 2–4 years, when genuinely crowded for corsican heath. Only repot corsican heath every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using well-drained, alkaline to neutral (ph 6.5–8.0). The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does corsican heath need?

When is the best time of year to repot corsican heath?

Does corsican heath like to be root-bound?

Yes — corsican heath genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise corsican heath after repotting?

Not immediately. Wait about 4 weeks after repotting corsican heath. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.