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Rudbeckia hirta (Asteraceae)
A magnificent, upright annual or short lived perennial easily grown from seed throughout the United States. The large 5 to 9 inch single blooms are rich golden orange or mahogany red continuously flowering through the hot summer months. Grows in various soils requiring full sun for best results. Heat & drought tolerant once established and best of all forgives neglect. Adds a nice contrasting color to many areas that seem predominantly yellow during the summer months. Johnny Wildseed gives this variety two thumbs up!!
Average planting success with this species: 80%
Height: 2-3 feet
Germination: 7-30 days
Optimum soil temperature for germination: 70F
Sowing depth: 1/16"
Blooming period: June-September
Average seeds per pound: 1,451,500
Seeding rate: 2 lbs. per acre
1 oz Covers: 1,361 sq. ft.
Suggested use: Roadsides, open fields, cut flower gardens, mixtures.
Miscellaneous: An excellent cut flower with a vase life of 7 to 14 days. Cut fresh, split stems, immerse in cold water with a sugar additive.