Day lilies should be divided every few years ideally in December or January.
Try to plant in a location that enjoys full sun and remember to apply water fairly sparingly. Keep in mind when planting that Hyperion is thought of as hardy, so this plant will survive close to or on freezing temperatures. A soil ph of between 6.0 and 7.0 is ideal for Hyperion as it does best in weakly acidic soil - neutral soil.By our calculations, you should look at sowing Hyperion about 42 days before your last frost date.