This grafted 'imperial' mandarin tree was planted in this pot over a year ago and is not healthy.
Other plants at the store actually had fruit on them when I purchased this but it has never fruited.
It's in a full sun position in Queensland, Australia so I do wonder if it's too much sun.
I water it once a week or so, there's a hole about 10mm in diameter at the bottom of the pot for drainage.
The soil is a mix of potting mix and compost but it's just from a hardware store so honestly could be very low quality.
As you can see, the leaves are yellow, brittle, and have little dark dots on them.
Any ideas? I'm pretty clueless as to what this plant needs to thrive.