On 24 Jun, 15:06, (Steve Harris) wrote:
In article ,

(Russel Sprout) wrote:
Check for root fly lavae.

Thanks for the suggestion. No sign and the roots appear healthy. The
Kohl Rabi in particular are thriving on whatever this is.

Steve Harris - Cheltenham - Real address steve AT netservs DOT com
A useful bit of gardening software athttp://www.netservs.com/garden/

In the absence of root fly, this looks like the plants have had a
severe check in growth, kept too long in plugs? allowed to get dry and
hot? insufficient or erratic watering after planting? kept in a hot
greenhouse and planted out without any hardening off period? By
watering I mean thre whole volume of soil in which you hope the roots
will grow - not just a bit around where the roots are now. Given
suitable conditions the roots will go much further than most people
expect.