Look to ensure a distance
11.7 inches (30.0 cm) between Buffy's Doll seeds when sowing to make sure your seedlings have enough space.
By our calculations, you should look at sowing Buffy's Doll about 42 days before your last frost date.
Buffy's Doll is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.