
Prune dormant and price the job for the thorns, not the height: stout spines on the twigs and lower branches make climbing and hand work genuinely hazardous, so this is lift work with proper PPE rather than a spurs-and-rope tree. Fresh cuts bleed a sticky white latex that gums up bars and chains, so expect slower cutting and more cleanup time than a tree this size would normally warrant.
It is remarkably durable and slow to decline, and the wood resists decay so thoroughly that dead limbs stay sound and firmly attached for years instead of shedding. That makes visible deadwood a poor health indicator on this species — assess it at the root collar and at old fence-wire wounds, where embedded wire and decades of mower damage cause the real structural defects.