Columbine / aquilegia

1. 1

   Pick the wild species or named hybrids

   Wild granny's bonnet (Aquilegia vulgaris): the UK native (and widely naturalised) — blue, purple, white, or pink nodding bells on 60 cm stems. Self-seeds, hybridises freely, the easiest aquilegia. Long-spurred hybrids (McKana's Giants, Mrs Scott Elliott): larger flowers, longer back-curving spurs, range of bicolours. Often shorter-lived. Black Barlow and other Barlow series: doubled flowers without spurs, deep purple-black, distinctive. Crimson Star, Nora Barlow, William Guinness: named cultivars with specific colour patterns. Alpine species (A. flabellata, A. canadensis): smaller, more refined, suit rockeries. For a first aquilegia: plant A. vulgaris — it'll spread, hybridise, and give you a perpetual colony.

2. 2

   Sow direct or plant young

   From seed: surface-sow in May–June (needs light to germinate). Direct-sow where you want the plants. Germination in 14–28 days. From plant: 1 L pots in spring or autumn. Aquilegias have long taproots and don't transplant well once mature — get them in young.

3. 3

   Plant in sun or part shade, ordinary soil

   Adaptable. Sun gives more flowers; part shade gives longer-lasting flowers and better foliage. Ordinary garden soil, ideally well-drained but moisture-retentive. Aquilegias tolerate clay if not waterlogged. Spacing 40 cm. Position: aquilegias suit cottage gardens, woodland edges, gravel gardens, mixed borders.

4. 4

   Accept the cross-pollination

   Aquilegias are promiscuous. Plant two different colours within bee range (50 m+) and the offspring seedlings will be a riot of unpredictable colours — usually muddier than the parents, sometimes spectacularly new combinations. To preserve a specific colour: isolate one variety, or accept that the seedlings will revert to wild blue-purple within a few generations. Many UK gardeners welcome the colour lottery; some plant single-colour beds in distant corners.

5. 5

   Watch for aquilegia leaf miner

   The main UK pest. Aquilegia leaf miner (a small fly) lays eggs on the leaves; larvae tunnel through the leaf creating winding white tracks. Cosmetic damage — doesn't kill the plant, doesn't significantly affect flowering, but ruins the foliage appearance. Two responses: (1) Pick off and bin badly affected leaves at first sight (don't compost — larvae overwinter in fallen leaves). (2) For severe infestations: cut affected plants down hard after flowering; the fresh regrowth is usually miner-free.

6. 6

   Cut spent stems for repeat or leave for seed

   Two approaches, both valid. Cut spent flower stems at the base after the first flush fades (late June). The plant may produce smaller secondary stems with a few more flowers, and the foliage stays tidy. Leave the spent stems for the architectural seedheads (small upright capsules splitting open to release shiny black seeds) and the self-seeding that perpetuates the colony.

7. 7

   Accept the short lifespan

   Aquilegias live 3–4 years on average. Don't be surprised when individual plants die out after their fourth flowering — this is normal. Self-seeding is the perpetuation strategy: let some plants set seed each year and the colony renews itself indefinitely without effort. Some hybrids are shorter-lived than the species — the long-spurred Mrs Scott Elliott and McKana types often last only 2–3 years.

8. 8

   Manage self-seeding

   Aquilegia seedlings appear in spring around mature plants — often in surprising places (gravel paths, between paving). Pull unwanted seedlings while small; transplant desired ones to fill gaps (they move well as small plants but resent disturbance once their long taproot establishes). For a controlled colony: deadhead before seed sets each year. For a self-renewing cottage-garden look: let the colony self-manage, weeding out only crowded or unwanted seedlings.

Columbine sawfly and aphids can defoliate; leaf miner creates white trails.