Heuchera 'Citronelle' (Coral Bells 'Citronelle') care

Light

Picture the indirect light an east-facing window gives mid-morning — that's the brightness heuchera 'citronelle' grows fastest in. Tolerates more shade than most Heucheras while retaining its chartreuse-yellow colour. Dappled light or partial shade with bright ambient light is ideal; direct afternoon sun bleaches the delicate yellow to near-white and scorches leaf margins. Morning sun for 2 hours is beneficial. You'll know it's right when new leaves come out the same size and colour as the established ones. Smaller, paler new leaves = move closer to the window.

Watering

Aim for when the top 2-3 cm of soil is dry, roughly every 5-7 days during the growing season for heuchera 'citronelle', but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Maintain consistent moisture, especially during dry summers. The larger-leaved nature of 'Citronelle' means it transpires more than compact cultivars; check soil moisture more frequently in warm, dry periods. Mulching significantly reduces irrigation needs.

Soil and pot

Heuchera 'Citronelle' grows best in humus-rich, moist but free-draining loam. pH 6.0-7.0. Enriching soil with leaf mould or compost greatly benefits 'Citronelle'. It prefers slightly more moisture-retentive conditions than some Heucheras but cannot tolerate waterlogging. A woodland-style soil mix with added grit works well in containers. 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

Heuchera 'Citronelle' sits happiest at around 40-60% humidity and 5-24°C (41-75°F). Average garden humidity is sufficient. In woodland or damp-shade settings, ensure adequate airflow to prevent fungal issues. The large leaf surface area can hold moisture, so overhead watering is best avoided. If you keep the room above 5 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 heuchera 'citronelle' sparingly. Apply a balanced granular fertiliser in early spring. A dilute liquid seaweed feed every 3-4 weeks from April to July supports the vigorous foliage growth of this larger cultivar. Avoid high-nitrogen formulations that reduce colour intensity. 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 heuchera 'citronelle' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Crown rot — More susceptible to crown rot if planted deeply; always keep the crown at soil level and ensure excellent drainage.
• Vine weevil — Check roots of pot-grown plants regularly; apply nematode biological controls in late summer.
• Bleaching in sun — Yellow foliage is particularly sensitive; even indirect bright sun can bleach the leaves in summer — provide consistent dappled shade.
• Large leaf scorch — Wind scorch can affect the larger leaves; shelter from cold, drying winds in exposed gardens.
• Slug damage — Tender new growth and large leaf area are attractive to slugs; protect with organic pellets or copper barriers.

Companion plants

Heuchera 'Citronelle' pairs well with Hostas, Astilbe, Ferns, and Epimedium. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Divide large clumps in spring or early autumn; each division needs vigorous roots and a growing crown. Seed propagation is possible from species Heuchera but cultivar characteristics are not reliably reproduced from seed — vegetative division is the standard method. 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

Heuchera 'Citronelle' is mildly toxic to pets. Heuchera is not listed as toxic by the ASPCA. Mild gastrointestinal irritation may occur if any part of the plant is ingested by pets or children. As a precaution, treat as mildly toxic and position away from animals that chew garden plants. 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.

Heuchera 'Citronelle' deep-dive guides

Every aspect of heuchera 'citronelle' care, each with its own calibrated guide:

• Common heuchera 'citronelle' problems & fixes
• Heuchera 'Citronelle' watering schedule
• Heuchera 'Citronelle' light requirements
• Best soil mix for heuchera 'citronelle'
• Heuchera 'Citronelle' fertilizing guide
• When to repot heuchera 'citronelle'
• How to propagate heuchera 'citronelle'
• How to prune heuchera 'citronelle'
• What's eating my heuchera 'citronelle'?
• Heuchera 'Citronelle' growth rate & size
• Heuchera 'Citronelle' cold hardiness
• Heuchera 'Citronelle' temperature & humidity
• Is heuchera 'citronelle' toxic to cats & dogs?
• Is heuchera 'citronelle' toxic to cats?
• Is heuchera 'citronelle' toxic to dogs?
• All 56 Heuchera varieties
• Getting heuchera 'citronelle' to bloom

Featured in these plant shortlists

Heuchera 'Citronelle' qualifies for 5 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• Best low-light houseplants — Houseplants that need no direct sun and cope with a north-facing room or a spot well back from a window.
• Best plants for a north-facing window — Houseplants for a north-facing window: bright, even, indirect light and no scorching direct sun. Each pick verified against its documented light needs.
• Best plants for cold, dark rooms — Houseplants that cope with BOTH low light and a cool, unheated room — the hardest indoor spot to fill. Every pick tolerates a low of about 10°C and shade.
• Best flowering houseplants — Indoor plants grown for their blooms — selected from the flowering species in Growli’s plant-care library.
• 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 30 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Heuchera 'Citronelle' is also commonly called Coral Bells 'Citronelle' or Alumroot 'Citronelle'.

• Common box care — light, water and common problems
• Japanese box care — light, water and common problems
• Faulkner box care — light, water and common problems
• All 11687 plant care guides in the Growli library