Sow thinly directly where they are to grow and after germination thin carefully to allow the remaining plants space to grow.
Try to aim for a seed spacing of at least 3.9 inches (10.0 cm) and sow at a depth of around 0.23 inches (0.6 cm). Soil temperature should be kept higher than 13°C / 55°F to ensure good germination.By our calculations, you should look at sowing Helens Welsh Siberian about 28 days before your last frost date.
Sow direct slowly removing the seedlings that are causing the overcrowding and leaving the ones best positioned to develop fully.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Helens Welsh Siberian is a very hardy plant.Harvest when needed and lift with a hand fork or trowel.
This variety tends to be ready for harvesting by mid summer.