With so many health-promoting vitamins, antioxidants and fiber packed into every Heaven Can Wait Blackberry, you'll feel like time is on your side. Not only is this one of the most healthful blackberries you can grow, it's also one of the easiest to maintain. Thornless, self-supporting canes mature to a manageable 4-8 ft. height, and berry clusters are easily accessible from the outer edges of the plants. Heaven Can Wait is self-pollinating and thrives in zones 5-8, with an extended fruiting period that starts in mid-June. PPAF.