Norwegian Maple Drummondii

I have owned this beautiful tree for 8 yrs & it is 20+ yrs old. Every year I have cut out any reverting branches. Last year we carried out some building work which meant cutting the roots back on 1 side of the tree & it lost its leaves slightly earlier than normal. Sadly this year when the leaves have opened the majority have opened as darker green with a paler green border, not the normal pale green with cream border. Does anyone know if it will right itself or have I ruined a beautiful tree?!

Re: Norwegian Maple Drummondii

Reply from Kathy C

Hi, Ashley,
'Drummondii' is notorious for reverting back. You've done well to be so vigilant! Stress could cause an increase of reversion, however, I am wondering did you fertlise the tree after the work was done. If so, that could cause a major reversion. I would hesitate to do any major pruning now - it's the wrong time of year and it might still need time to recover from the root pruning it had. Perhaps only remove any leaves that are all green?
Kathy C