Start seeds indoors six weeks before last frost date.
Try to aim for a seed spacing of at least 2.60 feet (80.0 cm) and sow at a depth of around 0.78 inches (2.0 cm). Soil temperature should be kept higher than 12°C / 54°F to ensure good germination.By our calculations, you should look at sowing Rose de berne about 42 days before your last frost date.
Transplant out when around 15cm (6 inches) high.
Plant to the first set of true leaves to promote strong root growth.
As Rose de berne is tender, ensure temperatures are mild enough to plant out - wait until after your last frost date to be on the safe side.An heirloom originating from France. It is sometimes thought that ‘Berne’ is a reference to the capital of Switzerland, and therefore where the tomato originated, but in fact the tomato ‘Rose de Berne’ is known is Switzerland as a French tomato.
Rose of berne, Rose du berne, Rose de bern, Berner rose