Colin Spooner wrote:

I love Euphorbia's, and have quite a few doing well in my garden.
I have Wulfennii,Dixter,and other common ones.
I am stuck on how to cut them back,as some are getting a bit leggy. A
gardening book I have, suggests 'cutting old stems back to 2 inches in
July' -- is this good advice??

When pruning remember that the sap is caustic and extremely unforgiving
if you get it in the eyes. Wear gloves and eye protection.

Also can Euphorbias be propagated successfully from cuttings?

Yes. Though it is easier if you split a small bit off with some root
attached. E. polychroma sometimes self seeds here.

Regards,
Martin Brown