I have had this

[charles]

Hi Dan, sometimes I get this too, exactly as you describe and it seems linked to age of seed and moisture in the rooting zone, I have added vermiculite to the mix as the West Riding I use is a little dense. Also I water the seed tray as little as possible. However the New Horizon is a lighter texture and has worked for you before. Pricking out early does help, when seedlings are tiny, and it rarely happends with fresher, home saves seed.