Spring tends to be the best, after all frosts are done.
BTW, putting cactus around a house as a hedge is something I did on a property years ago. There was a way back way someone could sneak onto the property on blind side… (ill intent was the only reason someone would want to take this convoluted path to the property)
So I planted yucca(s) three layers deep (more than 6′ wide). The needles on a Yucca actually has a skin irritant on it, not to mention being very sharp and rigid.
Be careful with pets around these though. Some pets are not to bright and you don’t want to run into these at speed.
