I haven’t personally done it with an apricot because they’re finicky jerks around here (middle Ohio, US). Even in ground apricots here are barely worth the shade they give in my opinion. That being said, my multigrafted potted pear tried to fruit this year. It was too young so I didn’t allow it to. So the theory is sound as far as I can tell.
I don’t know about which cultivars are available in the UK but that might be the best place to start. We have “patio-style” peach trees here that are designed to live in pots. Do you know what cultivars are available for you?
No, it’s not exactly a patio style apricot tree. I can’t remember the name, but it was supposed to be 2m height at full size, do likely dwarf/semi-dwarf I guess.
(To clarify - The pear tree hasn’t flowered yet. The apple tree did flower but only made 2 fruit the size of a plum…so doesn’t count. Lol.)
I have a Robada that I grafted a number of years back. It’s the only tree that hasn’t fruited yet since then. It’s side by side with a nectarine (grafted the same year) which has fruited (albeit lightly) for a couple years. Both in large cement pots.
Not conclusive, but that’s all I know about the topic.
I’ve fruited apricots, sweet cherries, nectarines, and pluots in pots as small as 7 gallon but mostly 20-30 gal. Rootstock doesn’t matter too much the pot keeps them small.
The main issue is that after about 2-3 crops the tree loses vigor and gets root bound so needs up potting and major pruning to re invigorate the tree. Fruit size is always smaller than in ground. But fruit quality is good.
Yes. I have an apricot I grow in a pot. The pot is at least three feet tall and holds 6 medium bags of garden soil. I am in zone 9-a/b in France. it is not a dwarf or Patio tree. My weather is similar to parts of California. Where are you?