Book excerpt: When it comes to garden plants, cacti are anything but standard issue. The bulk of home gardens contain exactly zero species of cactus,Êand the thought of growing them makes gardeners think, ÒOuch!Ó InÊThe GardenerÕs Guide to Cactus: The 100 Best Paddles, Barrels, Columns, and Globes, Scott CalhounÊis out to change that perception, and bring the beauty and ease of cactus home.ÊItÕs high time that cacti took their place alongside the trendyÊsucculent.