Concept: putting a vine, eg passion fruit, choko, etc over the garden shed to cool it in summer and make use of the vertical space for food production, plus it looks more appealing. Could even grow different vines at same time to add greater visual and food interest. Plus, Great book, apparently ;-). All you need to know about how to build your own little green roof on a shed or outbuilding.
CEROPEGIA-WOODII-String-of-Hearts Tuber beads are small beads which form on stem at the leaf bases. Can be planted to produce new vines. Press the tuber into the soil, & keep it moist (not wet), plant the bead while it is still attached to the mother plant, for speedier rooting. Once rooted & growing, sever from the main plant.