For casual locavores, there’s the Greenmarket. But for hard-core grow-it-yourself types, there’s Hayseed’s (218 India St., nr. McGuinness Blvd., Greenpoint; 718-407-0116; through June), a rustic new pop-up shop helmed by backyard farmer and rooftop beekeeper Meg Paska. The store stocks all the essentials for the urban gardener’s rooftop, patio, and fire-escape pursuits: galvanized-steel tools, soil by the pound, beekeeping supplies, and more than 60 varieties of Comstock, Ferre & Co. seeds, including vegetables, herbs, flowers, tobacco, and an assortment of hops ($.95 to $6).