Columbine meadow rue

Sun

Partial shade, or full sun where the soil stays moist and summers are cool; provide afternoon shade in hotter districts.

Water

Keep evenly moist, especially during establishment and dry weather; avoid prolonged waterlogging.

Soil

Humus-rich, moisture-retentive but well-drained soil; tolerates acidic, neutral and alkaline conditions.

Height

2-4 ft (0.6-1.2 m)

Spread

1-2 ft (0.3-0.6 m)

Flowers

Late spring to early summer; fluffy clusters of pinkish lilac to mauve flowers, with white-flowered forms also available.

Foliage

Blue-green, divided leaves with rounded, lobed leaflets resembling columbine foliage; dies back in winter.

Growth

Moderate

Care needed

Low

• Pollinators
• Deer resistant

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Fairly tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   1.6 ft (0.5 m)

3. After 2 years

   2.3 ft (0.7 m)

4. After 3 years

   3 ft (0.9 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Toxic

Growth rate

Moderate

• Water deeply during dry spells so the root zone does not dry out completely.
• Apply a layer of garden compost or leaf mould in spring, keeping it clear of the crown.
• Avoid heavy nitrogen feeding, which can encourage weak, floppy stems.
• Support taller plants early with twiggy branches or a discreet plant ring in exposed positions.
• Divide established clumps in early spring only when needed; they can remain undisturbed for several years.

Pruning. After flowering, remove spent flower stems if you want to prevent self-seeding, leaving healthy basal foliage. Cut dead stems to ground level in late autumn or late winter before new growth starts.

Late winter

Cut down any remaining dead stems before new shoots emerge.

Early spring

Plant or divide clumps and water them in thoroughly.

Spring

Mulch with compost or leaf mould and install supports where needed.

Late spring

Check emerging foliage for slug and snail damage.

Summer

Water during dry spells and remove faded flower stems to limit seedlings.

Autumn

Collect ripe seed if wanted, or remove unwanted seedlings while small.

• Plant in loose groups through partially shaded borders for a light canopy of flowers above lower foliage.
• Combine with ferns and hostas at woodland edges, where its divided leaves contrast with broader shapes.
• Mix with astrantias and hardy geraniums in moist cottage-garden borders.
• Use among other moisture-loving perennials beside a pond, above the waterlogged margin.

Garden styles it suits: Woodland, Cottage garden, Romantic rose garden, English country, New perennial (prairie) and Blues and silvers.

Plant it with: Hostas, Lady fern, Astrantias, Hardy geraniums, Siberian iris and Astilbes.

Wildlife: Flowers provide pollen for bees and other visiting insects. It is not a native plant in the United States, Canada, the United Kingdom or Australia.

• Powdery mildew can affect foliage, especially when roots are dry; maintain soil moisture, improve airflow and remove badly affected leaves.
• Slugs and snails may eat young shoots; inspect at dusk, remove pests and use wildlife-conscious controls where necessary.
• Dry soil and strong afternoon sun can scorch leaves or cause early dieback; water deeply, mulch and provide afternoon shade.
• Tall stems may flop in wind or rich soil; provide early support and avoid excessive fertiliser.

Do not eat any part: meadow rues are considered potentially harmful if ingested. Species-specific information on poisoning severity in people, cats, dogs and horses is limited, so keep all parts, including roots, away from children and grazing or chewing animals.

• Columbine (Aquilegia vulgaris)

  The foliage is similar, but columbine has distinct flowers with backward-pointing spurs rather than fluffy clusters dominated by stamens.

• Chinese meadow rue (Thalictrum delavayi)

  Usually flowers later in summer, with finer foliage and loose sprays of small lilac flowers showing conspicuous yellow stamens rather than dense, fluffy heads.

• Yellow meadow rue (Thalictrum flavum)

  Has creamy-yellow flower clusters rather than lilac or white ones, and generally narrower leaflets.

The epithet aquilegiifolium means 'with leaves like Aquilegia', referring to the columbine-like foliage.

Propagation. Divide established clumps carefully in early spring. Sow fresh seed outdoors in autumn; winter chilling can help germination, which may be slow and uneven. Seedlings from named cultivars may differ from the parent.

Accepted botanical name

Thalictrum aquilegiifolium

Native range

Albania, Amur, Austria, Baltic States, Belarus, Bulgaria, Buryatiya, Central European Rus, China North-Central, China Southeast, Chita and Czechoslovakia.

Measured

Soil pH 7 to 7.5. Average height 66 cm.

Sources: GBIF (CC BY 4.0) and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.