Cylindric Arum (Cylindrical Lords-and-Ladies) care

Light

Cylindric Arum wants the spot a few feet back from a sunny window — bright enough to read a paperback at noon, but the sun never falls directly on the leaves. Grows naturally in dappled woodland shade and tolerates low to medium indirect light indoors. Avoid harsh direct sun, which scorches the delicate leaves. Dappled light near a north- or east-facing window suits it well. A faint hand shadow at midday is the right amount; a sharp dark shadow means it's getting direct sun and probably too much.

Watering

Water cylindric arum when the top 1-2 cm of soil is dry during the growing season; cease watering during summer dormancy. 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. Water moderately in spring while in active growth and reduce significantly as leaves die back in early summer. Do not water the dormant tuber. Resume watering when new growth appears in autumn or early spring.

Soil and pot

Cylindric Arum grows best in humus-rich, well-draining loam. A mix of loam, leaf mould, and sharp sand mimics woodland floor conditions. Good drainage prevents tuber rot during the dormant period. Neutral to slightly alkaline pH is preferred. 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

Cylindric Arum sits happiest at around 40-60% humidity and 5-20°C (41-68°F). Tolerates average household humidity comfortably. Occasional misting during the growing season is beneficial but not essential. Avoid placing near heating vents that create excessively dry air. 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 cylindric arum sparingly. Apply a balanced slow-release fertiliser at the start of the growing season in early spring. One or two liquid feeds at half strength during active growth are sufficient; do not feed during dormancy. 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 cylindric arum in the Growli community. Each is annotated with the most common cause so you know where to start.

• Tuber rot — Caused by overwatering, especially during summer dormancy; ensure soil dries completely when the plant is dormant.
• Slug and snail damage — Emerging spring foliage is attractive to molluscs; use copper tape or organic slug pellets outdoors.
• Premature leaf yellowing — Normal in early summer as the plant enters dormancy, but if it occurs earlier it may signal overwatering or nutrient deficiency.
• Failure to flower — Insufficient chilling during winter dormancy; ensure exposure to cool temperatures below 10°C.
• Berry drop before ripening — Inconsistent watering during fruiting; maintain even soil moisture until berries are fully coloured.

Companion plants

Cylindric Arum pairs well with Arum italicum, Cyclamen hederifolium, and Galium odoratum. 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 offsets from the parent tuber in late summer during dormancy, replanting at 5-8 cm depth. Can also be grown from fresh seed sown in autumn, though germination is slow and erratic. 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

Cylindric Arum is toxic to pets. The ASPCA lists the Arum genus as toxic to dogs and cats. All parts contain calcium oxalate crystals and potentially irritant alkaloids; the scarlet berries are particularly hazardous. Ingestion causes oral pain, drooling, vomiting, and swelling — seek veterinary advice immediately. 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.

Cylindric Arum deep-dive guides

Every aspect of cylindric arum care, each with its own calibrated guide:

• Common cylindric arum problems & fixes
• Cylindric Arum watering schedule
• Cylindric Arum light requirements
• Best soil mix for cylindric arum
• Cylindric Arum fertilizing guide
• When to repot cylindric arum
• How to propagate cylindric arum
• How to prune cylindric arum
• What's eating my cylindric arum?
• Cylindric Arum growth rate & size
• Cylindric Arum cold hardiness
• Cylindric Arum temperature & humidity
• Is cylindric arum toxic to cats & dogs?
• Is cylindric arum toxic to cats?
• Is cylindric arum toxic to dogs?
• All 6 Arum varieties

Featured in these plant shortlists

Cylindric Arum qualifies for 6 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.
• Houseplants toxic to cats & dogs — The common houseplants the ASPCA lists as toxic to cats and dogs — the ones to keep out of reach, each with its symptoms and a safe alternative.
• Best small & tabletop houseplants — Compact houseplants that stay under about 40 cm — desk, shelf and windowsill plants that never outgrow a small space.
• 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

Cylindric Arum is also commonly called Cylindrical Lords-and-Ladies or Alpine Arum.

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• All 11687 plant care guides in the Growli library