Perennials in borders often put on strong lush growth that makes them vulnerable to collapse, especially after heavy rain or strong winds.
Staking them early in the season will help avoid disaster. In particular, tall plants and hybrids with large flowers require additional support, such as dahlia and the peony which possess heavy flower heads. So may need a helping hand in helping their stems support them.
Staking helps to keep them propped up, ensuring they grow tall and just as nature intended. Tomatoes, such as the cherry and roma varieties, are the most common plants that require staking.