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Plant care

Anemone coronaria 'Mr. Fokker' (Mr. Fokker anemone) care

Anemone coronaria 'Mr. Fokker'

Also called Mr. Fokker anemone, blue poppy anemone, violet anemone.

RHS H4USDA 7-10Toxic to petsIndoor Around 25-35 cm (10-14 in) tall in flower

Watering rhythm

Direct sun (at least 4-6 hours)

Keep soil evenly moist through growth and flowering; reduce as foliage yellows toward dormancy

Light

Direct sun (at least 4-6 hours)

Soil

Fertile, free-draining loam, neutral to slightly alkaline

Humidity

40-60%

Temp

7-18°C

Pet safety

Toxic to pets

Mature size

Around 25-35 cm (10-14 in) tall in flower

Care at a glance

Light

Anemone coronaria 'Mr. Fokker' needs sun on the leaves, not just bright ambient room light. Full sun for the best stems and bloom count; tolerates light shade. The flowers open with sunlight and close in dull weather and overnight, so a bright open position shows them off best. 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 anemone coronaria 'mr. fokker' keep soil evenly moist through growth and flowering; reduce as foliage yellows toward 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 in pre-sprouted corms and keep consistently moist but never waterlogged. Let the surface dry slightly between waterings to avoid corm rot, and stop watering once the foliage dies back.

Soil and pot

Anemone coronaria 'Mr. Fokker' grows best in fertile, free-draining loam, neutral to slightly alkaline. Add compost for fertility and grit for drainage; raised beds and containers work well. Soak corms a few hours before planting and set them 4-5 cm deep; orientation is not critical. 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

Anemone coronaria 'Mr. Fokker' sits happiest at around 40-60% humidity and 7-18°C (45-65°F). Suited to the moderate humidity of a cool spring. Airflow to discourage botrytis and powdery mildew matters more than any precise humidity figure, particularly under cover. If you keep the room above 7 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 anemone coronaria 'mr. fokker' sparingly. Feed every 2-3 weeks during active growth with a balanced or potassium-leaning liquid fertiliser, from established foliage through the long flowering period. Reduce feeding as the plants begin to die back. 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 anemone coronaria 'mr. fokker' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Corm rotSoft, mouldy corms from oversoaking or wet soil. Soak only a few hours, pre-sprout in barely damp medium, and plant in free-draining soil.
  • Botrytis (grey mould)Grey fuzzy rot on flowers and leaves in cool, damp weather. Ventilate, remove affected growth, and harvest flowers before they fully open.
  • Powdery mildewWhite film on foliage in warm, still, humid air. Space plants, improve airflow, and keep leaves dry.
  • Early decline in heatFlowering tails off and foliage dies back above the low 20s°C. Plant early for a long cool window and provide afternoon shade where springs are hot.

Propagation

Propagated from corms to keep the cultivar true. Lift corms after foliage dies down, dry and store cool and dry over summer, then re-soak and pre-sprout in autumn or late winter before replanting. Corms multiply naturally and can be separated when lifting. 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

Anemone coronaria 'Mr. Fokker' is toxic to pets. Anemone coronaria belongs to the buttercup family (Ranunculaceae) and is toxic to cats and dogs. Although the ASPCA does not list Anemone under its own name, the genus carries the family toxic principle ranunculin, which becomes the irritant protoanemonin on chewing. Ingestion can cause oral pain, drooling, vomiting and diarrhoea. Keep corms and cut blooms out of reach of 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.

Anemone coronaria 'Mr. Fokker' care — frequently asked questions

What is the common name for Anemone coronaria 'Mr. Fokker'?

Anemone coronaria 'Mr. Fokker' is most commonly called Anemone coronaria 'Mr. Fokker', but it is also known as Mr. Fokker anemone, blue poppy anemone, violet anemone. The names refer to the same species, so care instructions for Anemone coronaria 'Mr. Fokker' apply identically to anything sold as Mr. Fokker anemone.

How much light does anemone coronaria 'mr. fokker' need?

Anemone coronaria 'Mr. Fokker' grows best in direct sun (at least 4-6 hours). Full sun for the best stems and bloom count; tolerates light shade. The flowers open with sunlight and close in dull weather and overnight, so a bright open position shows them off best.

How often should I water anemone coronaria 'mr. fokker'?

Water anemone coronaria 'mr. fokker' keep soil evenly moist through growth and flowering; reduce as foliage yellows toward dormancy. Water in pre-sprouted corms and keep consistently moist but never waterlogged. Let the surface dry slightly between waterings to avoid corm rot, and stop watering once the foliage dies back. 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 anemone coronaria 'mr. fokker' toxic to cats and dogs?

Anemone coronaria 'Mr. Fokker' is toxic to pets. Anemone coronaria belongs to the buttercup family (Ranunculaceae) and is toxic to cats and dogs. Although the ASPCA does not list Anemone under its own name, the genus carries the family toxic principle ranunculin, which becomes the irritant protoanemonin on chewing. Ingestion can cause oral pain, drooling, vomiting and diarrhoea. Keep corms and cut blooms out of reach of pets.

What USDA hardiness zone does anemone coronaria 'mr. fokker' grow in?

Anemone coronaria 'Mr. Fokker' is rated for USDA zone 7-10 (cool-season annual or lifted in colder zones) and RHS hardiness H4. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Anemone coronaria 'Mr. Fokker' deep-dive guides

Every aspect of anemone coronaria 'mr. fokker' care, each with its own calibrated guide:

Featured in these plant shortlists

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

Related guides

Anemone coronaria 'Mr. Fokker' is also known as Mr. Fokker anemone, blue poppy anemone, and violet anemone.