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Well, putting all your trees on one farm may slow down the game - an chances are you will run out of space for all the trees you have....
I have all my chopping trees on farm 6 (Cork at the right, and others heading left by size). Pretty much fills that one.
For other trees, I have put them on 4 different farms - by harvest time. So all 5 day harvest trees on farm 2, 4 days on farm 3, and so on (3 on 4, 2 on 5). I again placed them from the back of the farm heading to the middle by size using both the top and right sides to make a long line of each. I increased the trees untill such time as I never run out of items. Some required only a line or so, others needed many lines of trees. For the trees not used, I added a full line and keep them in case they are ever needed.
This way all the trees on one farm are abvailable for harvest on the same day
Had just finshed rearrnaging all my trees and Cashew trees came out
So put them on farm 1 for now
Check it out if you want - Senior Cornwall