Evergreen Candytuft (Perennial candytuft) care

Light

Evergreen Candytuft needs sun on the leaves, not just bright ambient room light. Requires full sun for at least 6 hours daily to flower well and maintain a dense, compact habit; plants in shade become leggy and flower sparsely. A south or west-facing windowsill in the northern hemisphere is the default; anywhere else, expect the plant to stretch and pale out within a season.

Watering

Water evergreen candytuft every 1–2 weeks when establishing; drought-tolerant once established. The actual day count varies with pot size, light, and season — the finger test (or lifting the pot to feel its weight) is more reliable than a fixed calendar. Empty any drainage saucer afterwards so the pot isn't sitting in water. Drought-tolerant once its roots are established; overwatering and poorly drained soil are the main causes of crown rot and plant death.

Soil and pot

Evergreen Candytuft grows best in 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. A pot with a working drainage hole is non-negotiable for this species — even free-draining mix will turn soggy in a closed planter. If you love the look of a decorative pot without a hole, use it as a cachepot around an inner nursery pot you can lift out to water.

Humidity and temperature

Evergreen Candytuft sits happiest at around Low to moderate (30–50%) humidity and -15 to 35°C (5 to 95°F). Tolerates the dry air typical of sunny, exposed garden sites; good air circulation around the base discourages the fungal diseases associated with damp, stagnant conditions. If you keep the room above year-round and avoid placing the plant near a cold draught, a hot radiator, or an air-conditioning vent, you have already handled the two biggest indoor stressors.

Fertilising

Feed evergreen candytuft sparingly. Feed sparingly — a single application of a balanced slow-release granular fertiliser in spring is usually sufficient; excess nitrogen produces leafy growth at the expense of flowers. Skip fertiliser entirely on a stressed, recently-repotted, or actively wilting plant — fertiliser salts make damage worse, not better. Wait for a round of healthy new growth before resuming a feeding rhythm.

Common problems

Below are the issues we see most often on evergreen candytuft in the Growli community. Each is annotated with the most common cause so you know where to start.

• 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.
• Crown rot — Caused by waterlogged soil or excessive moisture at the base; ensure sharp drainage and avoid mulching right up to the woody stems. Most common on clay soils in wet winters.
• Caterpillars (cabbage white butterfly) — As a Brassicaceae member it can be targeted by caterpillars of Pieris species; check the undersides of leaves in summer and remove caterpillars by hand or treat with Bacillus thuringiensis.

Propagation

Take semi-ripe stem cuttings 7–10 cm long in early summer, insert into gritty compost, and root in a cold frame or cool greenhouse; also propagated from seed sown under glass in early spring. Propagation is the cheapest, most satisfying way to expand a collection — and it doubles as insurance against losing a mature plant to an accident. Take a backup cutting once the parent is established and healthy.

Toxicity to pets

Evergreen Candytuft is mildly toxic to pets. Iberis sempervirens is not individually listed on the ASPCA Toxic Plant database, but as a member of the Brassicaceae family it contains glucosinolates that may cause gastrointestinal irritation (vomiting, diarrhoea) in cats and dogs if ingested in quantity. Some secondary sources report potential cardiac, renal, and hepatic effects with large ingestion. Treat with caution around pets and seek veterinary advice if ingestion occurs. If you keep cats, dogs, or curious children in the house, weigh placement carefully — a high shelf or a hanging planter is enough for casual safety. For severe ingestion incidents, call your local vet and the ASPCA Animal Poison Control Center (in the US, 888-426-4435).

Pet-safety status is sourced from the ASPCA Toxic and Non-Toxic Plant List, which catalogues the most-asked-about plants for cats, dogs, and horses.

Evergreen Candytuft deep-dive guides

Every aspect of evergreen candytuft care, each with its own calibrated guide:

• Common evergreen candytuft problems & fixes
• Evergreen Candytuft watering schedule
• Evergreen Candytuft light requirements
• Best soil mix for evergreen candytuft
• Evergreen Candytuft fertilizing guide
• When to repot evergreen candytuft
• How to propagate evergreen candytuft
• How to prune evergreen candytuft
• What's eating my evergreen candytuft?
• Evergreen Candytuft growth rate & size
• Evergreen Candytuft cold hardiness
• Evergreen Candytuft temperature & humidity
• Is evergreen candytuft toxic to cats & dogs?
• Is evergreen candytuft toxic to cats?
• Is evergreen candytuft toxic to dogs?
• Getting evergreen candytuft to bloom

Featured in these plant shortlists

Evergreen Candytuft qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• Best houseplants for full sun — Houseplants that want direct sun — the species for a hot south or west-facing windowsill where shade-lovers scorch.
• Best houseplants for a cool room — Houseplants that tolerate cool conditions down to about 10°C — for an unheated spare room, hallway, porch or a home kept cool.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Evergreen Candytuft is also known as Evergreen candytuft, Perennial candytuft, and Edging candytuft.

• Geranium cinereum var. subcaulescens care — light, water and common problems
• Geranium clarkei 'Kashmir White' care — light, water and common problems
• Geranium clarkei 'Kashmir Purple' care — light, water and common problems
• All 10153 plant care guides in the Growli library