I was seeking a bit of advice. I have had plenty of success in propagating frangipani cuttings but this time I have taken it a bit further. I have two hardwood cuttings about 1800 to 2100mm long. they are a very tall slender branch with a nice wine canopy. the trunk diameter is about 100-130mm thick. I have made a nice clean saw cut on both.
My question is has anyone had any success in striking a cutting this large before. My process of propagation is as follows:
1-Dry cuttings out for 2-3 weeks until wound is sealed
2 - Dig hole about 700mm deep and 400 dia
3- Fill bottom with 75mm course gravel then 150-200mm of 50% course river sand and 50% soil mix
4- I will provide 6 large 50mm hardwood stakes for each tree and tie back at both ground ant top of stake for maximum bracing
5 - Try not to water too much and keep reasonably dry.
They will be in Partial to full sun.
What are your thought on my success and does anyone have any more advice as I would love these to be a success as they will be beautiful instant-ish trees. Both have a nice trunk line. I will take photos when they are in the ground

I am building a new bonsai area and these two trees will be framing the entry

Cheers All
Ryan