In about 3 years you'll be asking us how to kill that crazy vine because its taking over. We had ours for 3 years, it split the boards on our pergola, was growing under the porch and popping up everywhere. So down it came, dug it up, burned it, poured weed killer in the whole. It came back, everywhere. Poured salt in the hole, it came back. 3 years later we are still fighting this vine. You cant hurt it, do what you need to do, it'll never even know you've trimmed it, but be careful it might start growing on you!