Fantastic result @suequarford. Many thanks for sharing the photo - I'm sure your work will inspire others and we look forward to watching them grow.
Nice post and I reckon the new hedgeline will look great in a year or so.
I have a more established line of Magnolias along my front (north side) fence on Sydney's Northern Beaches (not right on the coast).
Unfortunately, I hadn't picked up the advice about regular tip pruning to get bushiness. The result is that we now have 2.5m high and a bit sparse around the lower branches.
Is there any way to encourage growth lower down? Or should I just get an underplanting in there of something new?
Welcome to the community @boatbloke and many thanks for joining in the discussion.
Please feel free to post anytime you need a hand with something around the house or garden. We look forward to reading more about your projects and plans.
You can tip prune the top growth to encourage side growth lower down to fill the plants out, but it may take a couple of years to achieve the look you're after. Magnolias have a tendency to produce strong upright shoots if pruned too severely, so don't go in hard.
Take out the top 30cm or so of the main upright shoots now, and then next winter repeat that pruning technique to force the trees to produce more side shoots next spring. You might not be able to get them to fill out right down low but they will certainly look better for the effort you put in.
Regular tip pruning through the growing season is best - nipping off just the growing tips.