Thai Basil is most often used fresh or cooked and is a popular ingredient in Southeast Asian cuisines like Thai, Cambodian, Lao, and Vietnamese. Unlike sweet basil, Thai Basil has sturdy and resilient leaves that stand up to prolonged heat and cooking. Hence, it’s well-suited for infusing flavor into broths and soups, from traditional Vietnamese Pho to Thai green or Panang curries.. Mature Size: 18″ x 12″. Full Sun (6+ Hours).