It does look like drought may be the problem. I grew a holly in a large pot for a few years, so it’s worth a try. Mine was much taller…about 2m. And give it some shade too. Welcome to Goy.

Hi Heronbay, long time no see as they say.

Does it have black berries? thats unusual for a holly.

as you'd have to water a tub daily why not water it in the ground daily instead. Once established it will cope better in the ground. I have a holly in full sun and it is quite happy.

we've not had much rain of late which wont help.