If you put in climbing branches, they'll climb them or possibly rub on them during shed, but they don't need them :3 The cheapest branches I've gotten were taken from my backyard, stripped of bark and put in 10 parts water 1 part bleach for several minutes, then baked in the oven for 10-15 minutes and allowed a day to cool before setting it in my enclosure. Only thing it costs me is a couple cents on my gas bill No evergreens!