Where are you located?

Hertfordshire in Uk

I wouldn't bother trying to save it. It has not been treated well in that container ( probably alack of adequate acidity and no fertilization, no pruning, maybe lack of adequate water) and there is little you can do now to bring it back to any sort of former glory.

In my area, heaths and heathers are sold in great variety and in small, inexpensive sizes. If these are plants you would like to grow, I'd suggest purchasing a new, fresh and well-tended start and plant in the ground, not in a container. An acidic, organically enriched soil in lots of sun and sufficient water early in its life to get it established. And prune back after flowering to keep dense and compact and to encourage more flowering tips.

Hi folks Was wandering if you could give me some tips on growing heather,I bought this Darleydale plant last year nice purple flowers but this winter nothing no flowers the plant looks healthy green minus the flowers what do i need to do am i doing something wrong.Thanks Paul

Where are you? Any chance of a photo?