Snapdragons are a classic garden perennial often grown as an annual. These medium-height flowers will bloom throughout the cooler months in a variety of colors. They can often survive through summer if watered regularly, to bloom again in the next fall, though our Texas summers can make this a challenge. Plant in well-draining soil and allow to dry out a bit between waterings. Once established, they are frost tolerant and can survive quite cold temperatures if protected.