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Plant care

Columbine 'Nora Barlow' (Granny's bonnet) care

Aquilegia vulgaris

Also called Granny's bonnet, Columbine, Nora Barlow aquilegia.

RHS H7USDA 3–9Toxic to petsIndoor 60–90 cm tall

Watering rhythm

Bright indirect light (just back from a sunny window)

Once or twice a week during dry spells; water stress shortens the flowering season

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Light

Bright indirect light (just back from a sunny window)

Soil

Fertile, humus-rich, moist but well-drained loam

Humidity

40–70%

Temp

−20–28°C

Pet safety

Toxic to pets

Mature size

60–90 cm tall

Care at a glance

Light

In the wild columbine 'nora barlow' 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. Grows well in full sun or partial shade. Light dappled shade prolongs flowering in warm climates. Avoid deep, dry shade. 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

Aim for once or twice a week during dry spells; water stress shortens the flowering season for columbine 'nora barlow', but treat that as a starting point rather than a rule. A south-facing summer windowsill will dry the pot twice as fast as a north-facing winter room. Lift the pot; if it feels noticeably lighter than it did wet, water it. Prefers consistently moist but never waterlogged soil. More drought-tolerant than many perennials once established, but foliage declines quickly in extreme heat and drought.

Soil and pot

Columbine 'Nora Barlow' grows best in fertile, humus-rich, moist but well-drained loam. Incorporate organic matter before planting. Tolerates a range of pH (5.5–7.5). Heavy clay should be amended with grit and compost to improve drainage. 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

Columbine 'Nora Barlow' sits happiest at around 40–70% humidity and −20–28°C (−4–82°F). Adapts well to typical UK garden humidity. Avoid conditions that promote standing water on foliage, which can encourage mildew after flowering. If you keep the room above −20–28°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 columbine 'nora barlow' sparingly. Work a balanced slow-release fertiliser or compost into the soil in early spring. Avoid excessive nitrogen, which encourages leafy growth at the expense of flowers. A mid-season liquid feed of dilute potassium-rich fertiliser can extend 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 columbine 'nora barlow' in the Growli community. Each is annotated with the most common cause so you know where to start.

  • Powdery mildew — Grey-white coating on leaves after flowering, especially in dry conditions. Usually cosmetic; remove affected foliage.
  • Leaf miner — Pale tunnels or blotches in leaves caused by aquilegia leaf miner. Cut back affected foliage; new growth is usually clean.
  • Aphids — Clusters on young growth and flower stems in spring. Encourage predators or use organic insecticidal soap.
  • Short lifespan — Individual plants often last only 3–4 years. Allow self-seeding to maintain the display — seedlings may not come true to type.
  • Sawfly larvae — Caterpillar-like larvae strip foliage quickly. Remove by hand or apply pyrethrin-based spray early.

Companion plants

Columbine 'Nora Barlow' pairs well with Geranium pratense, Salvia nemorosa, Alchemilla mollis, and Iris germanica. These are species with similar light and water needs, so you can group them in the same room or on the same shelf and water as a batch.

Propagation

Sow seed in autumn or early spring in trays of moist compost and cold-stratify for 3–4 weeks. Seedlings transplant easily when small. Established clumps can be divided in autumn, though plants are not long-lived and seed propagation is preferred. 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

Columbine 'Nora Barlow' is toxic to pets. Aquilegia vulgaris is listed by the ASPCA as toxic to dogs and cats; the seeds and roots contain the highest concentration of cyanogenic glycosides and protoanemonin. Ingestion may cause vomiting, diarrhoea, and cardiovascular effects. All plant parts should be considered toxic. 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.

Columbine 'Nora Barlow' care — frequently asked questions

What is the common name for Aquilegia vulgaris?

Aquilegia vulgaris is most commonly called Columbine 'Nora Barlow', but it is also known as Granny's bonnet, Columbine, Nora Barlow aquilegia. The names refer to the same species, so care instructions for Columbine 'Nora Barlow' apply identically to anything sold as Granny's bonnet.

How much light does columbine 'nora barlow' need?

Columbine 'Nora Barlow' grows best in bright indirect light (just back from a sunny window). Grows well in full sun or partial shade. Light dappled shade prolongs flowering in warm climates. Avoid deep, dry shade.

How often should I water columbine 'nora barlow'?

Water columbine 'nora barlow' once or twice a week during dry spells; water stress shortens the flowering season. Prefers consistently moist but never waterlogged soil. More drought-tolerant than many perennials once established, but foliage declines quickly in extreme heat and drought. 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 columbine 'nora barlow' toxic to cats and dogs?

Columbine 'Nora Barlow' is toxic to pets. Aquilegia vulgaris is listed by the ASPCA as toxic to dogs and cats; the seeds and roots contain the highest concentration of cyanogenic glycosides and protoanemonin. Ingestion may cause vomiting, diarrhoea, and cardiovascular effects. All plant parts should be considered toxic.

What USDA hardiness zone does columbine 'nora barlow' grow in?

Columbine 'Nora Barlow' is rated for USDA zone 3–9 and RHS hardiness H7. Outside that range, grow it as a container plant that overwinters indoors before the first hard frost.

Columbine 'Nora Barlow' deep-dive guides

Every aspect of columbine 'nora barlow' care, each with its own calibrated guide:

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

Related guides

Columbine 'Nora Barlow' is also known as Granny's bonnet, Columbine, and Nora Barlow aquilegia.