Posted: 19/02/2017 at 08:10
It's too early to prune the long woody bits off yet as any fresh growth may get blasted by frost.
They may be cheap because they have box blight .... so if you have any other box plants them treat them as suspect and keep them quarantined until you're happy they are OK.
Once you are able to plant them they might benefit from using mycorrhizal fungi (Rootgrow) to give them a boost. They will also benefit from feeding .... I use a spray of seaweed solution on mine throughout the growing season. You can start trimming them up late May / June.
Keep looking out for box blight .... if you can plant them somewhere that gets a bit of a breeze that will help.
Good luck with them.