What's happened to my apple tree?

[BuffaloMozzerella]

I've been trying to grow an apple tree in a large pot. It's been growing okay until this week when it's suddenly started to go brown and looks like it's dying.

Is there anything I can do to save it?

I'd suspect drought plus nutritional deficiency - although we've just had a week of rain. Try digging about 2 inches into the soil to see how wet it is underneath. Take off all brown leaves and dispose of, don't compost them, just in case it's disease rather than nutrition. If it's the ends of twigs that are brown, you can cut the twig off to just above the last healthy leaf. Then see what the tree is like.

Most plants have a strong will to live.

Thank you

When you potted it, did you put stones or gravel in the bottom for drainage? If not then I wonder if the roots are waterlogged because it has rained quite a lot recently. If not, then have you fed it with a fertiliser this year? As Meredint says it could be nutritional deficiency.

I suspect that pot is nowhere near big enough. Give it a good soak. Repot it in a bigger pot, but it would have a better chance in the ground.

It's in a 40cm pot. I only got it this year and it's not that big yet. Yes there is gravel at the bottom for drainage.

No I haven't fed it. I will check that water, feed it and try removing the brown leaves. Thanks!

Also, check the roots in the pot. Sometimes you can get grubs in the soil which eat through the roots, and the first you know is when your plant keels over.