I agree with fidgetbones. I have an Acer shirasawanum whose beautiful yellow leaves were going brown at the edges early in the summer. I suspected it was in too sunny a position so moved it last winter to a shadier spot. This year, so far so good - the leaves are still perfect. Perhaps your Acer is getting too much direct sunlight at the hottest part of the day and needs to be moved?
It looks like acer brilliantissimum to me - are the new leaves shrimp pink in spring? Leaves start off pink then turn pale yellow as they age. It looks like scorched leaves - wet leaves combined with cold winds are one cause it. Can you move it to a more sheltered area? i had to move an Acer dissectum purpureum twice before I found its 'happy place'! Acer brilliantissimum is also very slow growing so I wouldn't be too bothered about its size after 2 years.
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I agree with fidgetbones. I have an Acer shirasawanum whose beautiful yellow leaves were going brown at the edges early in the summer. I suspected it was in too sunny a position so moved it last winter to a shadier spot. This year, so far so good - the leaves are still perfect. Perhaps your Acer is getting too much direct sunlight at the hottest part of the day and needs to be moved?
It looks like acer brilliantissimum to me - are the new leaves shrimp pink in spring? Leaves start off pink then turn pale yellow as they age. It looks like scorched leaves - wet leaves combined with cold winds are one cause it. Can you move it to a more sheltered area? i had to move an Acer dissectum purpureum twice before I found its 'happy place'! Acer brilliantissimum is also very slow growing so I wouldn't be too bothered about its size after 2 years.