Keep in mind when planting that Burnished Rose is thought of as hardy, so this plant will survive close to or on freezing temperatures.
Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Burnished Rose about 56 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Burnished Rose is a hardy plant.