Preparing your garden for winter is the best way to keep Santa's elves from setting up a shantytown in the vegetable patch. Stave off unsettling seasonal invasions with today's Groupon: for $20, you get $40 worth of plants and flowers at Deep Roots Garden Center in Manhattan Beach.

Inside Deep Roots Garden Center's tidy shop, a team of knowledgeable green thumbs helps customers select plants, flowers, shrubbery, and accessories to beautify gardens. Four-inch annuals and perennials ($1.99–$5.99) add pops of color to flowerbeds and 1- and 5-gallon plants ($8.99–$49.99) provide shelter for rapidly expanding bunny families. Larger trees and shrubs ($100–$150) come in drought-tolerant varietals that require minimal maintenance, and hearty succulents and cacti make even the most forgetful plant parent proud with their hearty resilience. The garden center also offers floral-arrangement services, creating one-of-a-kind bouquets and outfitting gentlemen with single roses ($5 each) to gift to their fastest racehorses.