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Rudbeckia triloba - Key Growing Information
DAYS TO GERMINATION: 7-10 days at 70-75°F (21-24°C). For best results prechill for 30 days
SOWING: Transplant - Sow 5-7 weeks before last frost. Cover seed lightly (1/64"). For best results, prechill for 30 days: Place seedling flats outside or in the refrigerator and keep moist for 30 days. After chilling, move flats into a warm location until emergence. Direct seed - Gently press seed into soil as soon as soil can be worked in early spring or fall. Pinching not required. Reseeds.
LIGHT PREFERENCE: Sun/Part Shade.
PLANT HEIGHT: 48-60".
PLANT SPACING: 18-24".
HARDINESS ZONES: Zones 3-9.
VASE LIFE: 10-14 days. Newly opened flowers might wilt when first harvested but will rehydrate and correct. More mature blooms that have been open for a few days will be firmer at harvest.
HARVEST: When blooms are completely open.
SOIL REQUIREMENTS: Average soil. Drought tolerant once established.
USES: Excellent cut flower, beds, and borders.
SCIENTIFIC NAME: Rudbeckia triloba
ALTERNATE NAME: Brown-eyed Susan