Sawtooth sunflower (Helianthus grosse-serratus) Synonyms:  Helianthus grosseserratus Genus:  Helianthus Sawtooth sunflower's abundant yellow daisy flowers bloom from late summer well into fall. The dark green, narrow leaves have a leathery gloss. A well-behaved plant, sawtooth sunflower forms a thick, slowly expanding clump. It can reach 10 feet and taller, depending on conditions. Noteworthy Characteristics:  Adaptable to a variety of growing conditions. Contrasts nicely with ornamental grasses and other perennials in a border, even when not in bloom. Native from Maine to North Dakota, south to Virginia, west to Oklahoma. Care:  Provide support if necessary. Moderately fertile, moist but well-drained soil in full sun. Propagation:  Sow seed in containers in spring in a cold frame. Divide in spring or autumn. Take basal cuttings in spring. Problems:  Downy and powdery mildews, canker, rust, and many fungal leaf spots are quite common. Caterpillars, cutworms, beetles, and weevils may attack plants.

Overview

Height 6 ft. to 10 ft. Growth Habit Clumps Growth Pace Moderate Grower Light Full Sun Only Moisture Medium Moisture Maintenance Moderate Characteristics Attracts Song Birds, Attracts Butterflies, Native, Showy Flowers Bloom Time Early Fall, Fall, Late Summer Flower Color Yellow Uses Beds and Borders, Cut Flower Style Meadow Garden Seasonal Interest Summer Interest Type Perennials