Keep in mind when planting that Rocket Bronze F1 is thought of as very hardy, so this plant will tend to go dormant over the long winter months. Ideally plant in loamy soil and try to keep the ph of your soil between the range of 6.0 and 7.0 as Rocket Bronze F1 likes to be in weakly acidic soil to neutral soil.
By our calculations, you should look at sowing Rocket Bronze F1 about 56 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Rocket Bronze F1 is a very hardy plant.