About
Helianthus grosseserratus, the sawtooth sunflower, is a robust, tuberous perennial sunflower from central North America producing the characteristic large, daisy-like, yellow flowerheads of the genus on tall, rough-textured stems in late summer and autumn. A bold and ornamental perennial for a large, sunny border.
About the genus
Helianthus, the sunflowers, are tall, erect annuals and tuberous or rhizomatous perennials with coarse, simple, rough-textured leaves and large, showy, daisy-like flowerheads in yellow, orange or occasionally red tones. Excellent for the back of a sunny border and important plants for pollinators.
Plant details
Suggested usesBedding, containers, hanging baskets.
Care notes
CultivationPlant out after last frost in fertile, well-drained soil.
PruningDeadhead regularly to prolong flowering.
PropagationGrow from seed sown in spring.
Pest resistanceGenerally pest-free. Monitor for common garden pests.
Disease resistanceGenerally disease-resistant. Ensure good air circulation.