Posted: 17/04/2014 at 22:45
Clarington I earthup when the stalks are about 6 inches tall. usually only the tops of a few leaves are then showing above the new ground level. Tubers are swollen stems not roots so we want lots of stem under clay. don't worry about covering some or all leaves they will shoot up again. you can add potatoe manure while earthing up if you think they need more.
Just placed the cloche over the second drill of Sharpes express, should force them on.