Sugarcane has grown from the verge of the road to the wall (national road), being on the south coast the can has obviously just spread from the fields close by over the years.

I have some great big trees along the perimeter and added thorn bushes and cactus every so often for a measure of safety from people jumping over walls.

Will look out for your bush and see if it will grow down here with the humidity thanks @simplylizelle