Leaves turning red on eucalyptus and dropping off!

[merlin]

It's the ones on the lower branches - not enough water maybe? Or too much?

Anyone know please?

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Watching this thread as we have one doing similar. Not just the lower branches, though.

My Mum's is doing that. maybe it's everyone?

By no means an expert but ours has always done this, so I assumed it was just what it does. Does it have lots of whispy new growth at the top?

Yes top half healthy and green- getting obsessive about picking up the fallen leaves now!