Outsidepride Angelonia Serena Blue Flower Seed - 30 Seeds Angelonia Serena Blue grows as a perennial in USDA Zones: 8 - 11. It does best in full sun and is heat resistant. Angelonia Angustifolia, also known as Summer Snapdragon only reaches a height of 10 - 12 inches and is perfect for flower gardens or containers. This durable plant is one of the few easy to grow Angelonia flowers from seed and will have blue blooms all through Spring and Summer. Sow these heirloom seeds at 3 - 4 seeds per plant and keep moist until germination occurs which is generally in 5 - 10 days. Our seeds are always Non-GMO and packaged for the current year.