A garden perennial that grows up to 9 feet tall with small yellow flowers can create a stunning vertical feature. As a gardening expert, I recommend considering such plants for adding height, colour, and texture to your outdoor space.
Top Choice: Giant Hogweed and Its Safer Alternatives
While Giant Hogweed can reach impressive heights with clusters of small yellowish-white flowers, it is toxic and not recommended for gardens. Instead, consider safer tall perennials like Rudbeckia laciniata (Cutleaf Coneflower), which can grow up to 8-9 feet and produces abundant small yellow blooms.
Another option is Ligularia, which grows tall with yellow flowers but prefers moist, shaded conditions.
Planting and Care Tips
These tall perennials need rich, well-drained soil and regular watering. Support staking may be necessary to prevent bending or breaking in windy conditions.
Space them adequately to allow air circulation and prevent disease. Deadhead spent flowers to encourage prolonged blooming.
Design Use
Tall yellow-flowered perennials work well at the back of borders or as natural screens. Their bright colour attracts pollinators like bees and butterflies, boosting your garden’s biodiversity.
Adding such tall perennials brings drama and life to your garden, making it vibrant and welcoming.