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Plant care

Dropwort care

Filipendula vulgaris

Also called Dropwort, Fern-leaf Dropwort.

RHS H6USDA 3-8Mildly toxic to petsIndoor 0.5–1 m tall

Watering rhythm

Direct sun (at least 4-6 hours)

Infrequent; drought-tolerant once established

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Light

Direct sun (at least 4-6 hours)

Soil

Moist but well-drained chalk, loam, or clay; neutral to alkaline

Humidity

Low to moderate

Temp

-20°C to 30°C

Pet safety

Mildly toxic to pets

Mature size

0.5–1 m tall

Care at a glance

Light

Aim for at least 4-6 hours of direct sun on the leaves. Prefers full sun for best flowering; tolerates light partial shade but produces fewer and shorter flower stems in shadier conditions. If your only bright window faces south, that's perfect for dropwort — same window any aroid would fry on.

Watering

Watering dropwort: infrequent; drought-tolerant once established. The number that matters isn't the day of the week — it's how dry the top 2-3 cm of the pot feels. A finger in the soil tells you more than a watering app. After every watering, tip the saucer. More drought-tolerant than other Filipendula species — its fleshy, tuberous roots store moisture; avoid overwatering or siting in areas with standing winter water.

Soil and pot

Dropwort grows best in moist but well-drained chalk, loam, or clay; neutral to alkaline. Naturally a chalk and limestone grassland plant; thrives in thin, free-draining soils with a high pH and performs less well on acid or waterlogged ground. 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

Dropwort sits happiest at around Low to moderate humidity and -20°C to 30°C (-4°F to 86°F). Well-suited to open, breezy positions; good air circulation around the fine foliage helps prevent powdery mildew in warm summers. 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 dropwort sparingly. Feed sparingly if at all — a light application of balanced fertiliser in spring on very poor soils is sufficient; rich feeding produces excessive 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 dropwort in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Powdery mildew — The fine foliage is susceptible to powdery mildew in warm, dry summers with poor air circulation; plant in an open position, water at the base rather than overhead, and cut back affected stems to promote clean new growth.
  • Fungal leaf spot — Brown or dark spots on foliage can develop in wet seasons; remove affected leaves promptly, avoid wetting foliage when watering, and ensure the soil drains freely to reduce the humidity around the crown.

Propagation

Divide established clumps in autumn or early spring, ensuring each division has at least one crown bud and healthy tuberous roots; alternatively, sow seed in autumn in a cold frame — seedlings are slow-growing in the first year but flower in the second or third year. 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

Dropwort is mildly toxic to pets. Filipendula vulgaris is not listed in the ASPCA Toxic and Non-Toxic Plant database, so confirmed non-toxic status cannot be stated. The plant contains salicylate compounds (including methyl salicylate) in its tissues; cats in particular have limited ability to metabolise salicylates, which can cause gastrointestinal upset and, in large ingested quantities, systemic effects. Classified as mildly-toxic as a precaution. 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.

Dropwort care — frequently asked questions

What is Dropwort?

Dropwort (Filipendula vulgaris) is a flowering plant with a clump-forming rosette perennial with finely pinnate basal leaves and upright, wiry flowering stems; dies back to ground level in winter. growth habit, reaching 0.5–1 m tall, 0.1–0.5 m spread at maturity. Dropwort is an elegant, rosette-forming perennial native to dry, calcareous grassland across Europe and the UK, producing finely divided, fern-like foliage and foamy sprays of creamy-white flowers flushed pink in bud on slender stems from May to August. Unlike its close relative meadowsweet, it is adapted to well-drained to dry chalk and limestone soils and tolerates poor, thin ground where few other ornamentals thrive.

How much light does dropwort need?

Dropwort grows best in direct sun (at least 4-6 hours). Prefers full sun for best flowering; tolerates light partial shade but produces fewer and shorter flower stems in shadier conditions.

How often should I water dropwort?

Water dropwort infrequent; drought-tolerant once established. More drought-tolerant than other Filipendula species — its fleshy, tuberous roots store moisture; avoid overwatering or siting in areas with standing winter water. The finger-test (or lifting the pot to feel its weight) beats a fixed weekly calendar because pot size, light, and season all change how fast the soil dries.

Is dropwort toxic to cats and dogs?

Dropwort is mildly toxic to pets. Filipendula vulgaris is not listed in the ASPCA Toxic and Non-Toxic Plant database, so confirmed non-toxic status cannot be stated. The plant contains salicylate compounds (including methyl salicylate) in its tissues; cats in particular have limited ability to metabolise salicylates, which can cause gastrointestinal upset and, in large ingested quantities, systemic effects. Classified as mildly-toxic as a precaution.

What USDA hardiness zone does dropwort grow in?

Dropwort is rated for USDA zone 3-8 and RHS hardiness H6. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Dropwort deep-dive guides

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

Featured in these plant shortlists

Dropwort qualifies for 3 curated Growli shortlists — each one filtered objectively from our structured plant-care library, so the selection is consistent and checkable:

Related guides

Dropwort is also commonly called Dropwort or Fern-leaf Dropwort.