Hi Team
I have a lemon dwarf that I planted on soil 4 years ago (north side). The soil is bit hard and I mixed some composts to it at that time. Unfortunately, the no fruit has been produced.
See photo.

Currently, I am thinking about repotting the plant behind the house (south side) next to deck.
Is any of the pot suitable, i have 2 ; grey one is 460mm width , black on is 360mm width.


How much potting mix and compost required? Do i just mix them? What else do I need to add in the pot?
Thanks
Thierry