Tall Sunflowers - Key Growing Information
DAYS TO GERMINATION: 7-14 days at 70-75°F (21-24°C)
SOWING: Direct seed (recommended) - After last frost. Transplant - Sow in final container 3-4 weeks prior to planting out. Dislikes root disturbance.
LIGHT PREFERENCE: Sun.
PLANT HEIGHT: Varies.
PLANT SPACING: 4-24". Single-stem varieties space 4-6" apart. Branching varieties space 18-24" apart.
HARDINESS ZONES: Annual.
HARVEST: Fresh - Flowers are just beginning to open. Dried - Flowers are completely open. Hang or use silica gel.
SOIL REQUIREMENTS: Light, well-drained soil. Excessive nitrogen may cause plants to grow too vigorously with abnormal flower shapes.
NOTES: Flower size and stem diameter are controlled by plant spacing, temperature, soil type, and day length. For early and late season production, select varieties that are day-length neutral or are noted as suitable for flowering under short days.
USES: Excellent cut flower or for gardens.