Talkback: How deep to sow seeds
Depth suggested for beetroot sowing is in my opinion wrong, and would be interested in any trial data to support the advice
I don't sow beetroot or nasturtiums as deep as 2 - 4 cms. I sow them about 1 - 2 cm.
Dordogne and Norfolk. Clay in Dordogne, sandy in Norfolk.
In general most seed packets exaggerate the planting depth.