Cortaderia selloana. This familiar ornamental grass takes three years to reach maturity from seed, but the end result is magnificent. A fountain of soft blue-grey foliage erupts from the centre of a massive clump. Above this, from late summer right into winter stand the distinctive, feathery panicles up to 3m (10') high. White Pampas Grass makes a bold statement wherever it is planted, and can be used as an architectural feature in garden design, anchoring or framing garden spaces. The inflorescences are fantastic as dry or fresh cut flowers.
Use 50 seeds per two foot diameter planting to create the dense clump look. Simply press the seeds lightly into moist soil indoors or direct sown. The seeds need light to germinate, so avoid covering them. The leaves of this fast-growing grass have sharp edges. White Pampas Grass is hardy to Zone 7, but can be overwintered in cooler zones by mulching over the roots in winter.
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.