Cortaderia selloana 'Splendid Star'

Spring - late · Outdoors

Feed young plants with slow release fertiliser

Spread a slow release fertiliser around the base of the plant to the edge of the foliage spread, so that it can feed the roots. It is helpful for this to be applied for several years.

This is a simple way to provide a nutrient boost until the plant becomes well established.

Spring-Autumn · Outdoors

Water during drought

After three or four weeks without rain, except for drought tolerant plants, those in the ground often get stressed. Adopt the habit of deep-watering one section of the garden each day. Check plants in pots more frequently, especially in hot weather.

Encourage plants to develop good root systems by giving occasional deep watering. Some plants, such as conifers and heathers, do not show much sign of distress so water these if in doubt.

Spring - early-mid · Planting

Divide when too large

The plant can be divided if it becomes too large or another plant is required. This may involve physically dividing the clump in two, removing offsets or small bulbs or dividing rhizomes. The new plants can be grown in pots or planted in the ground.

Winter - mid-late · Planting

Prune to the ground in winter

Cut foliage to the ground before new growth starts in spring.

Where stems are grown for ornamental value, they should be removed either before new growth starts in spring, or during winter when they begin to look ragged or untidy.