Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Astra Blue is thought of as very hardy, so this plant will tend to survive through freezing conditions. Astra Blue tends to grow best in a soil ph of between 6.1 and 7.8 meaning it does best in weakly acidic soil - weakly alkaline soil.
Growing Astra Blue from seed
By our calculations, you should look at sowing Astra Blue about 49 days before your last frost date.
Transplanting Astra Blue
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Astra Blue is a very hardy plant.