Try to plant in a location that enjoys full sun and remember to water moderately. Double is generally regarded as a half hardy plant, so although it can survive a small mild cold snap, it is wise to ensure that this plant is protected from frost damage. Double needs a potting mix and loamy soil with a ph of 5.5 to 7.0 (weakly acidic soil to neutral soil).
Growing Double from seed
By our calculations, you should look at sowing Double about 77 days before your last frost date.
Transplanting Double
Double is half hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.