Overview
Lythrum salicaria 'Swirl' is a plant with a clump forming habit in the genus Lythrum, part of the Lythraceae family, with deciduous foliage. Lythrum salicaria 'Swirl' grows best in full sun, and tolerates clay and loam soils and any pH. Its UK hardiness is rated H7. Suggested uses include cottage and informal garden, wildlife gardens, wildflower meadow and flower borders and beds.
About
Lythrum salicaria 'Swirl' is an herbaceous perennial in the Lythraceae grown for its upright spikes of purple flowers. It forms clumps of deciduous foliage and flowers from July to September. Suited to full sun and moist soils, it tolerates both well-drained and poorly drained conditions. The cultivar performs well in south- or west-facing positions in exposed or sheltered sites.
Growing conditions
Best soil and position for Lythrum
- Sunlight
- Full sun
- Soil type
- Clay, Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Poorly-drained
- Aspect
- South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
Lythrum salicaria 'Swirl' size, habit and characteristics
- Habit
- Clump forming
- Foliage
- Deciduous
- Suggested uses
- Cottage and informal garden, Wildlife gardens, Wildflower meadow, Flower borders and beds
Care notes
Pruning and caring for Lythrum salicaria 'Swirl'
- Propagation
- Division in spring
- Pest resistance
- Slugs and snails
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Lythrum salicaria 'Swirl'?
Lythrum salicaria 'Swirl' prefers full sun. It suits exposed and sheltered positions.
What soil does Lythrum salicaria 'Swirl' need?
Lythrum salicaria 'Swirl' grows best in clay and loam soil. It is happy in soil of any pH. Aim for soil that stays moist but well-drained to poorly-drained.
Is Lythrum salicaria 'Swirl' hardy in the UK?
Lythrum salicaria 'Swirl' has an RHS hardiness rating of H7, meaning it is fully hardy throughout the UK, tolerating temperatures below -20°C.
How do I propagate Lythrum salicaria 'Swirl'?
Division in spring.
More in the Lythrum genus
- Lythrum alatumwinged loosestrife
- Lythrum hyssopifoliagrass poly
- Lythrum portulawater purslane
- Lythrum salicaria 'Florarose'
- Lythrum virgatumwand loosestrife
- Lythrum virgatum 'Dropmore Purple'Wand Loosestrife