Marionberry is a flavorful, hybrid blackberry cultivar developed by Oregon State University. They are well known for a rich, sweet-tart flavor that is best used in pies or jams. The Marionberry is often referred to as the “Queen of Blackberries” and is rated by many as the best berry for making pies. It is a trailing, thorny vine that requires a support system for optimal growth. Marionberries ripen late spring and summer, with peak harvest time in July. Requires full sun, well-drained soil, and 1-2 inches of water per week. Marionberry vines are self-fertile and grow in zones 6-9.