Hi we bought and planted 5 x 1m high Lilly Pilly over a month ago to be a hedge. I read some advice on the internet to prune it after planting to promote it growing horizontally. I mistakenly cut 10 centimetres off the top of each of the plants main trunk, after thinking this is what they meant.
The question is, will the plant now stop growing from that main trunk vertically? We ideally want the plant to be at least 2 metres high. Is there anything else we can do to repromote this growth or did i really stuff this up?

Thanks in advance!