Chop back ornamental gr asses

Save seeds from the heads of grasses that may not survive the winter. Ornamental grasses such as pennisetum are marginally tender and particularly susceptible to frost damage when grown in heavy soil.

Tilly Ware visits Knoll Gardens in Dorset, which offers a masterclass in how to make your garden stay beautiful for longer

MAKE THE MOST OF YOUR OUTDOOR SPACE THIS MONTH WITH OUR GUIDE TO THE CHANGING SEASONS

Throughout August I cut the box hedges that give shape to the vegetable garden. They’re just under waist height but that’s enough to protect most plants from the wind and they are a good dark backgrou

Fill border gaps, spruce up container displays and divide perennials. Get ahead for next year by planting crocuses for spring and taking salvia cuttings

Break up the border blues with shimmering grasses and airy blooms that dance in the breeze