September is the month when exotic plants reach their exuberant best, and in the tropical border at Greenacre Toby shows us which plants have performed.Carol's favourite plant this week is the fiery crocosmia and she shows us the best ones to grow to set our borders ablaze.Now is the perfect time to get new lawns growing, and Toby gives us the lowdown on laying turf while Alys chooses the less expensive option of growing a lawn from seed.And Radio One DJ Sarah Cox invites us into her own garden to see how she and her family have benefited from her first year of growing vegetables.