This week we're going wild for some of the daintiest, most airy and graceful plants out there - ornamental grasses. Author and RHS Editor Gareth Richards shares his favourites and offers tips on how to use them in the garden. Eminent expert and nurseryman Neil Lucas takes us on a tour of one of the best grass gardens in the country, Knoll Gardens in Dorset. Plus growing tips from RHS Gardening Advisor Nicky Barker, and we delve into the undergrowth to meet some grass-loving creatures - conehead crickets - with Brian Eversham of The Wildlife Trusts. In our houseplant series, Wisley Horticulturist Alex Young tackles repotting. **Plants mentioned** Grasses: Deschampsia, Hakonechloa macra, Calamagrostis, Pennisetum, Arundo donax, Carex oshimensis Evercolor Series, Molinia, Stipa gigantea, Panicum, Miscanthus, Festuca glauca, Poa, Sporolobus, Miscanthus 'Cindy' & 'Starlight', Miscanthus giganteus; Imperata cylindrica 'Rubra', Milium effusum 'Aureaum', Festuca 'Elijah Blue' Perennials: Rudbeckia, Echinacea, Verbena bonariensis, Aconitum, Scabiosa, wild carrot (Daucus carota)