hey guys, little bit of kiwi output i suppose, pohutukawas are everywhere and get prity large, spread of up to 60 metres or so, mostly coastline. They do have aerial root systems, sometimes reaching to the ground and continuing to grow, huge laterals that touch the ground. The only real problem here is leaf miner which drills the leaves but other than that not really a problem. they are actually a HUGE weed in South Africa and grow everywhere theres a bit of dirt so i shouldnt see a problem in Aussy. Timber is very strong and red in colour heres some photos...
http://www.opotiki.com/data/pictures/tekaha3.jpg
They can live for anywhere up to 500 years and some of the bigger ones have girths of up to5 or 6 metres.