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Repotting guide

When & how to repot Evergreen Candytuft (Iberis sempervirens)

Also called Evergreen candytuft, Perennial candytuft, Edging candytuft.

More about evergreen candytuft

About Evergreen Candytuft

Iberis sempervirens · also called Evergreen candytuft, Perennial candytuft · flowering

Iberis sempervirens is a spreading, woody-based evergreen sub-shrub native to the rocky hillsides and scrubland of southern Europe, from the Iberian Peninsula east to Turkey. It forms a low, dense mound of narrow dark-green leaves that is smothered in flat-topped, pure-white flower heads from mid-spring to early summer. The single most important care task is a light but firm trim immediately after flowering to keep the plant compact and prolong its productive life. The toxicity status with respect to pets is uncertain — Iberis is not on the ASPCA list, but the Brassicaceae family can cause gastrointestinal irritation, so treat with caution around pets.

Mature size: 20–30 cm tall, spreading 40–60 cm wide.

Watch for — Legginess and reduced flowering: Without post-flowering pruning the plant becomes woody, sprawling, and produces fewer blooms; cut back by one-third to one-half immediately after flowering each year to maintain a dense, compact mound.

How to tell evergreen candytuft needs repotting

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

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 evergreen candytuft

Every 2–3 years; top-dress in the in-between years. Evergreen Candytuft's growth habit — low, spreading, woody-based evergreen sub-shrub. — sets the pace. Iberis sempervirens is a spreading, woody-based evergreen sub-shrub native to the rocky hillsides and scrubland of southern Europe, from the Iberian Peninsula east to Turkey. It forms a low, dense mound of narrow dark-green leaves that is smothered in flat-topped, pure-white flower heads from mid-spring to early summer. The single most important care task is a light but firm trim immediately after flowering to keep the plant compact and prolong its productive life. The toxicity status with respect to pets is uncertain — Iberis is not on the ASPCA list, but the Brassicaceae family can cause gastrointestinal irritation, so treat with caution around pets.

What size pot to step evergreen candytuft up to

Move up exactly one pot size. A heavy evergreen candytuft dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot.

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 evergreen candytuft

Early spring, just as new growth restarts, is the ideal window for evergreen candytuft. 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 evergreen candytuft

  1. Consider top-dressing first. If evergreen candytuft is not badly root-bound, scrape off and replace the top 3–5 cm of soil instead — far less shock for a big plant that hates moving.
  2. Get help and one size up. For a full repot, choose a pot just one size larger. A heavy plant needs two people and a stable, free-draining pot.
  3. Ease it out on its side. Lay the plant down, slide the pot off, and gently loosen the outer roots. Do not bare-root a mature specimen.
  4. Repot at the same depth. Add fresh well-drained, lean to moderately fertile, chalk, loam, or sand beneath and around the rootball, keeping the original soil line. Firm it so the trunk is stable and upright.
  5. Water and leave it put. Water thoroughly, then leave evergreen candytuft in the same spot and light — moving and repotting at once is what makes it drop leaves.

Aftercare

Leave evergreen candytuft in exactly the same spot and light it was in before — moving and repotting at the same time is what makes a big specimen drop leaves. Water it in well, then let the top of the soil dry before watering again so the larger volume of fresh soil does not stay sodden. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for evergreen candytuft

Evergreen Candytuft wants well-drained, lean to moderately fertile, chalk, loam, or sand. Thrives in poor to moderately fertile, neutral to slightly alkaline soil (pH 6.5–8.0) with sharp drainage; avoid rich, moist soils which promote soft, disease-prone growth. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting evergreen candytuft — frequently asked questions

How often should you repot evergreen candytuft?

Every 2–3 years; top-dress in the in-between years for evergreen candytuft. Fully repot evergreen candytuft only every 2–3 years; in the in-between years just top-dress the top 3–5 cm of soil. Step up one pot size in spring with well-drained, lean to moderately fertile, chalk, loam, or sand. It is heavy and hates being moved, and a vastly oversized pot holds water against the roots and rots them.

What size pot does evergreen candytuft need?

Move up exactly one pot size. A heavy evergreen candytuft dropped into a vastly bigger pot sits in a reservoir of wet soil its roots cannot reach, which rots them and destabilises the plant. In the years between repots, lift off and replace the top 3–5 cm of soil (top-dressing) instead — it refreshes nutrients without the shock of a full repot. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot evergreen candytuft?

Early spring, just as new growth restarts, is the ideal window for evergreen candytuft. 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.

Should you top-dress or fully repot evergreen candytuft?

For a big, heavy evergreen candytuft, top-dressing — replacing the top 3–5 cm of soil — is the gentler option most years, with a full repot only every 2–3 years. A mature specimen sulks and drops leaves when fully repotted, so do it as rarely as the roots allow.

Should you fertilise evergreen candytuft after repotting?

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

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