Before you plant. Early fall is a good time to plant New Zealand wind grass and other perennials. Keep in mind that the best plant for your landscape is also one that works well with your climate and conditions. Smith notes that in his experience, soil heavy in clay is a death sentence to these plants, so he stresses good drainage above all. If you provide the plant with a little early nurturing, you should enjoy a long and pretty maintenance-free life from your New Zealand wind grass.