Saponaria - Key Growing Information
DAYS TO GERMINATION: 7-10 days at 70°F (21°C).
SOWING: Performs best in areas with cool summers. Sow at 2-3 week intervals until midsummer for continuous bloom. Blooms July to August. Direct seed (recommended) - Sow in early spring when the soil is cool and a light frost is still possible. Sow 2-3 seeds every 2", 1/8" deep. Thin to stand 2-9" apart when the first true leaves appear. Transplant - Sow directly into 72-cell plug flats, 2-3 seeds per cell, 2-3 weeks before last frost. Lightly cover seed. Thin to 1 plant per cell. harden off and transplant outdoors after last frost.
LIGHT PREFERENCE: Sun.
SOIL REQUIREMENTS: Average, well-drained soil.
PLANT SPACING: 2-9".
HARDINESS ZONES: Annual.
HARVEST: When 1-2 flowers in a spray are open.
USES: Excellent cut-flower filler. Cottage gardens.
SCIENTIFIC NAME: Vaccaria hispanica
ALTERNATE NAMES: Soapwort, cow soapwort