Try to plant in a location that enjoys full sun and remember to apply water fairly sparingly. Knight's Purple is generally regarded as a hardy plant, so this plant will grow or become dormant during the winter. Knight's Purple needs a soil ph of 5.5 to 7.0 (weakly acidic soil - neutral soil).
Growing Knight's Purple from seed
By our calculations, you should look at sowing Knight's Purple about 63 days before your last frost date.
Transplanting Knight's Purple
Knight's Purple is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.