over the last 20+ years i have been planting the same apples on the same root-stock in different locations across Melbourne, Observations for this have shown the same apple, fruit tree & garden flowering shrubs move the date they flower & ripen, the sequence of order they do this in does not seem to alter.
using Melbourne metro are such as Boxhill, Blackburn, Templestowe as a standard I have found this info for the following areas so far eg base date Oct 1st
Montrose, Kilsyth and foot of the hills ie Lillydale, FTG are all plus 1 week = Oct 8th
Healesville 2weeks = Oct 15th
Monbulk , The Patch, Upwey 3 weeks = Oct 22nd
Monbulk / Olinda at our place 380mtrs 4 weeks Oct 29th this has held true for 17 years in my observations form Templestowe heritage apple collection 200 vars to our collection 500 vars in the hills.
One major factor is temperature and intensity of the Hot Aussie sun but it also has a lot to do with Altitude plus also the adjacent forest and their extra moisture held there with a subsequent moderation of temperature like you get with the maritime effect around the ocean or big water bodies.
We prefer to use the method from the Book of apples Uk – Joan Morgan this F no. from 1–28this system is very easily transferred location to location in Melb or the hills or anywhere in the world, it all still follows the sae sequence so a cox’s orange pippin at F11 is going to flower before the F12 anywhere it goes.
also pollination is then Fxx pollinates 3 F numbers below and 4 numbers above
EG: Cox’s orange pippin F11 is pollinated by F8 -> F15
This of course is also governed by if its a Diploid or Triploid (the latter don’t give out viable pollen but all the Diploids do)
We recently recorded all the flowering dates for all our 500 apples ( that flowered that year) and have collated this data to reference against the known info and to identify more than 100 in our collection that are not yet given a Code typically info for all the french varieties many USA and Aussie ones plus many of our 63 cider ones also never made it to the national collection at Brogdale in Kent UK where 2800 were done via the F no. system.
This data will be available to our fruit tree class students in 2017 as will our data for the ripening charts for all tree fruit trees available to buy in Vic & SA that we have made as well.