Bishop's flower (false Queen Anne's lace) care

Light

Bishop's flower needs sun on the leaves, not just bright ambient room light. Thrives in full sun (6+ hours daily). Will tolerate light dappled shade but produces noticeably fewer and smaller flower heads, and stems become etiolated. Ideal in an open, south-facing cutting garden bed. 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 bishop's flower every 5–7 days; less once established. 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. Keep soil consistently moist while seedlings are establishing. Once plants reach 20 cm, they become reasonably drought-tolerant. Water at the base to avoid damaging the delicate umbels and to discourage mildew.

Soil and pot

Bishop's flower grows best in fertile, moist but well-drained loam. Performs best in moderately rich soil with good moisture retention, pH 6.0–7.5. Unlike some umbellifers, it benefits from soil that does not dry out completely in midsummer. Avoid very sandy or highly compacted soils. 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

Bishop's flower sits happiest at around 40–70% humidity and 5–27°C (41–81°F). Adapts well to a range of ambient humidity levels typical in UK and US gardens. In hot, dry conditions the flowering period is shortened; adequate soil moisture compensates for low humidity. If you keep the room above 5–27°C 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 bishop's flower sparingly. Incorporate a balanced granular fertiliser into the bed before sowing. On fertile soils, no further feeding is usually required. On poor soils, apply a balanced liquid feed monthly during the growing season. Avoid high nitrogen, which promotes leafy growth over 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 bishop's flower in the Growli community. Each is annotated with the most common cause so you know where to start.

• Transplant shock / root disturbance — Ammi majus has a taproot and strongly resents transplanting. Plants that are moved after the seedling stage frequently collapse or bolt prematurely. Always direct-sow or use biodegradable paper pots if starting indoors.
• Aphids on umbels — Dense clusters of aphids can infest flower heads, especially in warm settled spells. Hose off with water; apply insecticidal soap. Avoid broad-spectrum insecticides that harm the bees and hoverflies visiting the flowers.
• Flopping in wind — Tall stems are vulnerable to wind damage; plants in exposed positions may need staking with pea sticks or thin canes at around 50 cm height. Alternatively, sow more densely so plants support each other.

Propagation

Direct-sow in situ in early spring (or autumn in mild climates, USDA zones 8–10) into raked, weed-free soil at the surface — do not bury deeply as light aids germination (14–21 days at 15–18°C). Thin to 30 cm apart. Self-seeds very freely; deadhead some umbels to limit spread, or allow seed to drop for a naturalistic colony. 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

Bishop's flower is mildly toxic to pets. Ammi majus contains furanocoumarins (psoralens) which are photosensitising compounds — contact with the sap followed by UV exposure can cause phytophotodermatitis (skin blistering) in humans and animals. The ASPCA does not individually list Ammi majus, but furancoumarin-containing Apiaceae species are generally considered mildly hazardous. Wear gloves when handling; keep pets from chewing large amounts of foliage. 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.

Bishop's flower deep-dive guides

Every aspect of bishop's flower care, each with its own calibrated guide:

• Common bishop's flower problems & fixes
• Bishop's flower watering schedule
• Bishop's flower light requirements
• Best soil mix for bishop's flower
• Bishop's flower fertilizing guide
• When to repot bishop's flower
• How to propagate bishop's flower
• How to prune bishop's flower
• What's eating my bishop's flower?
• Bishop's flower growth rate & size
• Bishop's flower cold hardiness
• Bishop's flower temperature & humidity
• Is bishop's flower toxic to cats & dogs?
• Is bishop's flower toxic to cats?
• Is bishop's flower toxic to dogs?
• Getting bishop's flower to bloom

Featured in these plant shortlists

Bishop's flower qualifies for 4 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.
• Browse all 29 plant shortlists — pet-safe, low-light, drought-tolerant and more

Related guides

Bishop's flower is also known as Bishop's flower, false Queen Anne's lace, laceflower, and bullwort.

• Siebold's Magnolia care — light, water and common problems
• Yulan Magnolia care — light, water and common problems
• Common Rhododendron care — light, water and common problems
• All 8452 plant care guides in the Growli library