Video time!
All you need to practice jumping is the smallest of targets. In this case the wooden edges separating the mulch from the pavement. Given the width (an inch, maybe?) landing accurately is hard. One sure case of "smaller is harder" with this sort of thing. Jumping quickly between targets, even when small, is also a guaranteed way to nuke your energy.
And a bit of bonus video of recent training that I actually remembered to record: