Juncus effusus 'Spiralis'. This quirky cultivar of the soft rush Juncus effusus grows its stiff, smooth leaves in a curious corkscrew shape. The leaves add a touch of drama to floral bouquets. This plant prefers damp soils, and grows well at the margins of ponds or in soil that is constantly irrigated. It does well in slightly acidic soil (typical of pond margins) in full sun to partial shade. It is a hardy perennial in Zones 4 and up, but can be grown as an annual in cooler climes. Twister produces unremarkable, tan-coloured flowers in late summer and may self-sow in the right conditions. Grow it in a balcony container for visual impact, but keep it well-watered.
Cloud Grass, a species of bentgrass, forms a diaphanous hazy mist in late summer when its delicate, tiny flowers spread out in all directions. It is useful to know some tips on how to grow cloud grass.
Exposure: Full sun to partial shade
Start seeds indoors 4-6 weeks before planting out. Or direct sow in early spring, when soil is cool and a light frost is still possible. It can also be planted in late autumn.
Just cover the small seeds. At a temperature of 10-12°C (50-55°F) seeds should germinate in 21 to 25 days.
Transplant after last frost into average, well drained soil. Space plants 15-20cm (6-8″) apart. Feed regularly and don’t let the soil become completely dry. Keep an eye on the flowering stage and cut the stems for drying before the seeds set in order to prevent self-sowing. The flower stems are spectacular when dried and will last for months. Cut them and hang them upside-down in a dark, airy place until fully dried.