DAYS TO GERMINATION: 8-14 days at 68-72°F (20-22°C).
SOWING: Transplant: Sow 5-7 weeks before last frost. Cover seed lightly, as light is required for germination. Bottom water or mist to avoid covering seed with displaced soil. Transplant into cell packs or larger containers when the first true leaves appear. Harden off and transplant outside after the danger of frost has passed. Direct seed: Surface sow 2 weeks before last frost in groups of 3-4 seeds, 12-18″ apart. Thin to one plant when true leaves appear.
LIGHT PREFERENCE: Sun.
SOIL REQUIREMENTS: Average, well-drained soil. Tolerates poor soil.
PLANT SPACING: 12-18″.
HARDINESS ZONES: Zones 9-10. Best grown as an annual.
HARVEST: Deadheading increases bloom. Fresh: before blooms are completely open. Dried: when blooms are completely open. Remove stem and dry in silica gel.
USES: Excellent cut flower. Beds, pots, back of borders, or wild, meadow, and cottage gardens.
Notes: Rudbeckia requires long days to initiate flowering and will continue to produce some, smaller blooms into the fall but on shortened stems of reduced quality. Deadheading increases blooms during summer production. Rudbeckia tolerates heat and drought.
SCIENTIFIC NAME: Rudbeckia hirta
ALTERNATE NAMES: Blackeyed susan, gloriosa daisy
Planting & Growing
Indian Summer Coneflower will grow to be about 3 feet tall at maturity, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 18 inches apart. It grows at a fast rate, and under ideal conditions can be expected to live for approximately 3 years.
This plant should only be grown in full sunlight. It is very adaptable to both dry and moist locations, and should do just fine under typical garden conditions. It is considered to be drought-tolerant, and thus makes an ideal choice for a low-water garden or xeriscape application. It is not particular as to soil type or pH. It is highly tolerant of urban pollution and will even thrive in inner city environments. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selection of a native North American species. It can be propagated by division; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.
Indian Summer Coneflower is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. With its upright habit of growth, it is best suited for use as a ‘thriller’ in the ‘spiller-thriller-filler’ container combination; plant it near the center of the pot, surrounded by smaller plants and those that spill over the edges. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.
Black Eyed Susan Indian Summer
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