I'd like to grow a bunch of trees against my wall (something like an informal espalier - I want them flat against the wall). I am unsure of the two largest trees however.
Yoshino and Watereri both have a height of 12m+ and spread 8m+ according to RHS.
Would it be possible to keep these trees relatively small if I continue pruning them? I'm thinking to initially let them grow tall for a few years, then cut them down to the base of the trunk (around 1m) to make it bushy, then continuously / annually shorten the branches that form from the trunk.
I'd like to keep the height at no more than 3m, and contain the spread as much as possible.
Some things I've considered may help:
- I plan to have other, smaller trees (and shrubs, packed in tightly) right next to them - I'm thinking this competition might help keep them short.
- The soil around here is heavy clay which I think would impede growth.
- I can add vigourous climbers (honeysuckle and/or wisteria) around them which will again compete for resources.