Posted: 23/08/2017 at 18:57
Thank you for your message in which you said "We dug in alot of compost/mouanure recently to see if it helped but it was planted just below soil level originally. Have no idea what to do"
When I zoom in on your photograph it's obvious that there's been a lot of damage to the bark bof the tree just above the soil line. Do you have rabbits in the area, or has anyone used a strimmer or brushcutter around the base of the tree.
The damage does look bad to me. To be honest I'd be inclined to scrap the tree and plant a fresh one, and this time put rabbit guards around the trunks and clear the soil of grass and weeds for a diameter of 1 metre around the base of the tree so that there's no need to use any tools near the tree.