I have also recently planted 'Resilience' Syzygium, but also have growing as a hedge a few other varieties of the genus (Acmena, Syzygium). I've found that 'tip-pruning' as the plant grows produces the best results; that is, as the growing tips elongate, especially over spring, nip off the young tips back to a lower bud - back a node or two. This will encourage branching, which, to produce a bushy hedge, is what you're after. 'Resilience' really is mostly, though perhaps not totally, free of psyllid attack (psyllids cause an ugly blistering of the leaves, especially on S. Australe varieties). Resilient, but perhaps not totally free, though I haven't seen any effect on mine, just keep an eye on the new growth. Also, if you're growing them as a hedge, as they mature taper your pruning, that is slightly slant the hedge; narrow at the top, broad at the bottom. This allows the lower section of the bushes to receive some sunlight. Without it they might suffer leaving an ugly, dying, lower section. Good luck with it.

My apologies. Your response was read, and was appreciated. I have been intending to research more about what tip pruning is before replying, which I inevitably don't get a lot of time to do during the week. I certainly appreciate you taking the time to reply to my question. Thank you.

'Tip pruning' is simply the removal of fresh growing tips by pinching out the new growth with the tip of your fingers, or finger nails. I do it on a regular basis, especially now with new spring growth beginning.

We're considering planting a number of Syzygium Resilience along a poolside next to a fence, and keeping the shrubs to not more than about 1.7m high. Would anyone expect an issue resulting from having these shrubs next to a pool?

Well the roots are not known to be invasive, and if it's a concrete pool, no worries at all. I'd be mindful though, that too much chlorinated water - from splashing - might not be favourable.

blckrose, thx for your very useful comment. The pool is concrete, so am pleased that syzygium roots aren't invasive. Chlorine seems to be a potential problem with many plants/shrubs, so we'll have to ensure that only the other side of the pool is used! Seriously, tho', I'm glad you mentioned it. I believe we'll use them, all the same. Thanks, again.