Plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Iron Maiden is thought of as hardy, so this plant will survive close to or on freezing temperatures. Iron Maiden requires a soil ph of 6.1 - 7.8 meaning it does best in weakly acidic soil - weakly alkaline soil.
Growing Iron Maiden from seed
By our calculations, you should look at sowing Iron Maiden about 63 days before your last frost date.
Transplanting Iron Maiden
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Iron Maiden is a hardy plant.