I put some stakes inside the tubes but outside of most of the 150 (50 chestnuts and 100 persimmons) tubes I have to give a bit more room to grow. I have cattle on half the property and none on the other side. I suspect the cows like to mess with it at times but haven't had too many issues all things considered except that a few of the persimmons get chomped on when they get above the tube. On the side without cattle, I've only had a few blow off. They're typically close by and I just put them back on. After 2 or maybe 3 years, it's worth replacing the zip ties.