QuestionsHow to growFlowersBorder Perennial Flowersstipas 0 Vote Up Vote Down Natasha Keogh asked 13 years ago I have two different types of stipa – feathertail and golden oats – can i divide these and when? also do they need feeding and when? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Grasses are best planted, or divided, just beforw growth begins in spring. They are better not over-fed as they get messy.