Lythrum salicaria 'Rosy Gem' - Rosy Loosestrife, Pond Marginal Plant
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Product specifications and features
Product Description
Lythrum salicaria 'Rosy Gem' - Rosy Loosestrife, Pond Marginal Plant
Lythrum 'Rosy Gem' is usually sold as Lythrum salicaria 'Rosy Gem' or 'Rosey Gem', but the RHS lists it under Lythrum virgatum (wand loosestrife), a close relative of native purple loosestrife. Through the summer it carries slender spikes of bright rose-pink flowers above narrow leaves.
'Rosy Gem' at a glance
| Botanical name | Lythrum virgatum 'Rosy Gem' (sold as Lythrum salicaria 'Rosy Gem') |
|---|---|
| Common name | Rosy loosestrife |
| Plant type | Clump-forming perennial; dies back in winter |
| Height and spread | About 40 cm–1 m tall (sources differ), up to 50 cm wide |
| Flowers | Bright rose-pink, in slender spikes, June to August |
| Position | Full sun |
| Soil | Moist or poorly drained soil |
| Pond depth | 0–10 cm of water (our figure); the RHS treats it as a moist-soil plant |
| Hardiness | RHS H6 – hardy in a very cold winter (-20 to -15°C) |
| Native to | Garden form of wand loosestrife (not UK native) |
Where to plant 'Rosy Gem'
- The shallow margin of a garden pond
- Bog gardens and wet borders
- A sunny spot
Is it good for wildlife?
Yes. It is on the RHS Plants for Pollinators list, and the RHS says the flowers are particularly attractive to pollinating insects.
How to plant and care for it
Plant from spring to late summer in full sun. Cut back the old growth in spring. Watch for slugs and snails.
Which size should I buy?
Bare-root plants (7 cm, 9 cm, 1 litre and 3 litre) arrive without a pot or compost and are the most economical way to plant a group. Potted plants (9 cm, 1 litre and 3 litre) arrive growing in our peat-free compost and give a faster display. Packs of 3 come in 7 cm, 9 cm, 1 litre and 3 litre bare-root sizes and cost less per plant. The 2x Pot & Compost option is two plants supplied with pots and compost.
