Updated April 29 to reflect a new opening date. Jamba Juice franchisee Karen Tillman said she is opening a new location at the Shoppes at Sienna Plantation on May 10 at 9303 Hwy. 6, Ste. 100, Missouri City. Jamba Juice is known for selling smoothies, juices, snacks and more. www.facebook.com/SiennaJamba The location will hosting a grand opening event on May 11.