Question from Dave:
Hi Pat, the Beaumont macadamias are doing well – sending out new growth. I noticed that they each have 3 trunks coming up out of the ground. The Cates have one well defined trunk. Is this typical or should I get ready to do some pruning on the Beaumonts? Ideally, I’d like the Beaumonts to be single trunk trees about 10 to 15 feet tall with a 10 to 15 foot diameter canopy. I’ve never seen an adult Beaumont so, I’m not sure what I should expect.Thanks in advance.
Answer from Pat:
You are so right about the paucity of information on pruning macadamias in the home garden. As a result, many home-grown macadamias grow unevenly and look more like a raggedy shrub than a tree. Some don’t bloom at all and thus bear no nuts probably because a sucker from below the graft was allowed to take over. The best home-grown macadamia I ever saw had a single trunk that was at least a foot thick and a rounded head of growth on top. It bore a bounteous crop of nuts every year. It was growing next to an irrigated horse pasture. It’s roots got the water from the pasture and the only fertilizer it ever got was horse manure.