Foxbrook Cream is generally regarded as a hardy plant, so it can be safe to leave outdoors for the majority of winter (although if in doubt, using a row cover is often a good idea).
Growing Foxbrook Cream from seed
By our calculations, you should look at sowing Foxbrook Cream about 90 days before your last frost date.
Transplanting Foxbrook Cream
Foxbrook Cream is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.