I am thinking of planting some heavenly bamboo as a border between my neighbor and myself, but we are concerned that it will take over the area similar to what blackberries do. Is this the case with this type of bamboo or is it less invasive? Thank you

Is this the one you're speaking of? Heavenly Bamboos (Nandina domestica)

Knowing your location would really be helpful, but in my area, yes, it is very invasive! The roots run, and run, and run some more.

to NGA