Keep in mind when planting that Skywalker f1 is thought of as half hardy, so it will need cloching or fleece protection when the temperature dips.
Start indoors six weeks before last frost. Transplant outdoors 2-3 weeks before last frost. Start 12 weeks before first frost, transplant out 9 weeks before first frost.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Skywalker f1 is a half hardy plant.