Mark uses bottomless pots so it’s more like planting directly in ground in a raised bed.
Simon
True, more like a raised bed. BUT, I sell RootBuilder by the panels to folks who make them up into 10-40 gal. pots and move them indoors during the winter. One guy has his on homemade carts using galv. pipe as a push handle and large swivel 6" wheels. Rootmaker sells fabric bottoms or you can design your own bottom. You pot up in the spring and by fall the fabric bottoms will be locked in by the root system. Me? I'd just go with big fabric pots.
This fuzzy picture shows a huge old tree in a RootBuilder that must be 20' diameter.
Cantor, don't do Reed. It's too vigorous for your setup. I'm doing everything I can to keep that monster down to 12' X 12' and it was a frozen back stub after a heater failure Jan. 2018. In 7 months it grew to 10'. Of course it had the benefit of massive root system created by the RootBuilder system. All my trees get is Osmocote and rainwater....when we have it!
You'll be better off spending your time on quality compacts like GEM and Pinkerton. Both of mine are very manageable. Wurtz fruit is said to be fair to good but it's a weepy tree rather than upright.
http://tropicalfruitforum.com/index.php?topic=7511.msg96609#msg96609