I recently bought a small red Acer and moved it into a more permanent pot. It's about 2 1/2 feet tall and since I've moved it, the leaves have started to brown and shrivel like a dead leaf would in autumn. The pot is about 1 foot in diameter and 2 feet tall, and has a drainage hole in the bottom about 1 1/2 inch in diameter.
I live in the UK and it's been very warm the last few weeks but we've also had a few downpours. I've watered it a few times but not every night. It's in direct sun from about 10 am to 2 pm.
When I re-potted it I put some large stones in the bottom of the pot for drainage, some sods of grass from tidying the lawn, then some spare soil from the garden, then some compost.
Why is this happening, what have I done wrong and what can I do to fix it?
The following pictures are of the tree in its pot; some shriveled leaves; and also the trunk and lower branches, which look sort of dead, although that part may have been like that originally.
Click on any picture to see a close-up view.
I moved the tree out of the wind and re-potted in potting compost. All the "burned" leaves have fallen off and new buds seem to be appearing.