I stake almost anything that has a strong upward growth - usually from very early on. Depending on the plant, I may remove the staking. Further, I am more North than you, so I try to rotate plants 90 degrees every week or so. Some I need to rotate 180 degrees. Sun lean can be rather dramatic. I just wonder if there are any straight trees in Minnesota.
That flexible green gardening tape can be use to cinch up a little at a time as well.
