Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Mirage is thought of as half hardy, so protect with a row cover whenever the temperatures drop. Ensure your soil is potting mix and loamy and has a ph of between 5.5 and 7.0 as Trailing petunia is a weakly acidic soil to neutral soil loving plant.
Growing Mirage from seed
By our calculations, you should look at sowing Mirage about 77 days before your last frost date.
Transplanting Mirage
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Mirage is a half hardy plant.