Mayo - If some of your plants get rust, it is not the end of your daylilies. If some happen to be really rusty plants, you may decided to get rid of them, but some rust (to me personally) is not a big deal. We've been living with it here in the south in the USA for over a decade and folks are still buying and growing daylilies in most all regions. And if it becomes a real problem, then you can do what I am doing and breed for rust resistance and become more selective of what cultivars you acquire.