Yarrow 'Moonshine' (Moonshine yarrow) care

Light

Yarrow 'Moonshine' needs sun on the leaves, not just bright ambient room light. Demands full sun, six or more hours, for compact growth, strong stems, and continuous flowering. Shade causes weak, floppy stems and poor bloom. 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 yarrow 'moonshine' when the top few centimeters of soil are dry, roughly every 7-14 days. 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 established and prone to rot if overwatered. Water deeply but infrequently; let soil dry between waterings and avoid wet feet entirely in winter.

Soil and pot

Yarrow 'Moonshine' grows best in lean, well-drained, even sandy soil. Thrives in poor to average free-draining soil with neutral to slightly alkaline pH. Rich, moist soil produces lax stems and fewer flowers; sharp drainage is key over winter. 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

Yarrow 'Moonshine' sits happiest at around 30-60% humidity and -34 to 32°C (-30 to 90°F). A sun-loving border perennial that prefers dry air and open spacing; humid, crowded conditions encourage powdery mildew. 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 yarrow 'moonshine' sparingly. Very light feeder; usually needs no fertiliser. On poor soil one light spring feed is enough. Excess feeding produces leggy, flop-prone growth and reduces flowering. 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 yarrow 'moonshine' in the Growli community. Each is annotated with the most common cause so you know where to start.

• Flopping stems — Rich soil, shade, or overwatering make stems lax; grow lean and sunny, and cut back after the first flush to encourage sturdier rebloom.
• Powdery mildew — Gray-white film forms in humid, crowded spots; improve spacing and airflow and avoid wetting foliage.
• Root rot — Wet, heavy soil rots the crown, especially in winter; ensure sharp drainage and avoid soggy sites.
• Center die-out — Clumps open up and weaken at the middle after a few years; divide every two to three years in spring to rejuvenate.

Propagation

Easily propagated by spring or autumn division of the clump, or by basal cuttings in spring. Being a hybrid it is not reliably grown from seed, so division keeps it true to type. 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

Yarrow 'Moonshine' is mildly toxic to pets. Yarrow (Achillea millefolium) is ASPCA-listed as toxic to cats, dogs, and horses, causing increased salivation, vomiting, diarrhea, and dermatitis due to achilleine and other compounds; this hybrid shares Achillea parentage and should be treated as toxic to pets. 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.

Yarrow 'Moonshine' deep-dive guides

Every aspect of yarrow 'moonshine' care, each with its own calibrated guide:

• Yarrow 'Moonshine' watering schedule
• Yarrow 'Moonshine' light requirements
• Best soil mix for yarrow 'moonshine'
• Yarrow 'Moonshine' fertilizing guide
• When to repot yarrow 'moonshine'
• How to propagate yarrow 'moonshine'
• Yarrow 'Moonshine' growth rate & size
• Yarrow 'Moonshine' cold hardiness
• Yarrow 'Moonshine' temperature & humidity
• Is yarrow 'moonshine' toxic to cats & dogs?
• Is yarrow 'moonshine' toxic to cats?
• Is yarrow 'moonshine' toxic to dogs?
• Getting yarrow 'moonshine' to bloom

Featured in these plant shortlists

Yarrow 'Moonshine' qualifies for 5 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.
• Best fragrant houseplants — Indoor plants with scented flowers or aromatic foliage — greenery you can smell, selected from our care library.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Yarrow 'Moonshine' is also commonly called Moonshine yarrow.

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