Euphorbia lactea 'White Ghost' (white ghost euphorbia) care

Light

In the wild euphorbia lactea 'white ghost' grows on the bright edge of a forest canopy, not in the canopy and not in the open. Indoors, that translates to within a metre of an unobstructed window, sheer curtain optional. Wants the brightest spot you can give it, including a few hours of direct sun through glass. Because the white tissue holds little chlorophyll, low light causes weak, etiolated growth and stem rot; acclimatise gradually to avoid scorching the pale skin. The fastest test: a hand held at the leaf casts a soft-edged shadow at noon — sharp shadow means too much sun, no shadow means too little light.

Watering

Euphorbia lactea 'White Ghost' watering is mostly about restraint. When the soil is fully dry, roughly every 2-3 weeks in summer, monthly or less in winter — and never on a schedule. The finger test (or the pot-lift test) catches the actual moisture state; a calendar assumes weather and light don't change. Water deeply then let the mix dry out completely before the next drink. Overwatering is the main killer. Cut watering sharply in winter when growth stalls. Always empty the saucer so roots never sit in standing water.

Soil and pot

Euphorbia lactea 'White Ghost' grows best in free-draining cactus and succulent mix. Use a gritty cactus compost cut with extra perlite, pumice or coarse sand (about one-third grit). The medium must drain fast and dry quickly; a terracotta pot with a drainage hole helps wick excess moisture. 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

Euphorbia lactea 'White Ghost' sits happiest at around 30-50% humidity and 18-27C (65-80F). Average dry household air suits it well. It tolerates the low humidity of heated rooms; avoid humid, stagnant conditions which encourage fungal rot on the pale stems. If you keep the room above 18 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 euphorbia lactea 'white ghost' sparingly. Feed monthly through spring and summer with a balanced cactus fertiliser diluted to half strength. Stop feeding entirely in autumn and winter while the plant rests. 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 euphorbia lactea 'white ghost' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Stem rot from overwatering — Soft, blackening or yellowing stems signal root and stem rot, the most common cause of death. Cut back water drastically, repot into dry gritty mix, and remove any mushy tissue.
• Etiolation in low light — Because the white tissue lacks chlorophyll, weak light produces thin, stretched, floppy growth. Move to the brightest available position with some direct sun through glass.
• Irritant latex sap — Any cut releases a copious milky latex that burns skin and eyes. Always wear gloves and eye protection, and rinse immediately if sap contacts skin.
• Cold damage — Below about 10C the stems can soften, discolour and collapse. Keep away from cold windowsills and draughts in winter and never let it freeze.

Propagation

Propagate from stem cuttings in spring or summer: cut with a clean blade, rinse the latex under water until it stops bleeding, then let the cutting callus for several days to a week before potting into dry gritty mix. Wear gloves throughout. 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

Euphorbia lactea 'White Ghost' is toxic to pets. The ASPCA lists Euphorbia species as toxic to cats and dogs. The milky white latex sap contains irritant diterpene esters that cause drooling, vomiting, and irritation of the mouth and stomach if chewed, and painful inflammation or blistering on skin and eyes. Wear gloves when handling or cutting, and keep away from pets and children. 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.

Euphorbia lactea 'White Ghost' deep-dive guides

Every aspect of euphorbia lactea 'white ghost' care, each with its own calibrated guide:

• Euphorbia lactea 'White Ghost' watering schedule
• Euphorbia lactea 'White Ghost' light requirements
• Best soil mix for euphorbia lactea 'white ghost'
• Euphorbia lactea 'White Ghost' fertilizing guide
• When to repot euphorbia lactea 'white ghost'
• How to propagate euphorbia lactea 'white ghost'
• Euphorbia lactea 'White Ghost' growth rate & size
• Euphorbia lactea 'White Ghost' cold hardiness
• Euphorbia lactea 'White Ghost' temperature & humidity
• Is euphorbia lactea 'white ghost' toxic to cats & dogs?
• Is euphorbia lactea 'white ghost' toxic to cats?
• Is euphorbia lactea 'white ghost' toxic to dogs?

Featured in these plant shortlists

Euphorbia lactea 'White Ghost' qualifies for 4 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

• 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 drought-tolerant houseplants — Houseplants that prefer to dry out — forgiving of forgotten watering and ideal for travel or busy weeks.
• 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 succulents for beginners — The easiest succulents and cacti to keep alive — selected by documented growth habit, each with the light and watering it actually wants.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

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Euphorbia lactea 'White Ghost' is also commonly called white ghost euphorbia or ghost cactus.

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