Approximately 95 seeds per gram
seed-counts are only a guide, not to be used for accurate calculations.
B and T World Seeds' reference number:
Type of plant - annual
Flower: BLACK-PURPLE, semi. to double
Height in meters: 1.6
Alcea rosea Blackcurrant Whirl double annual
is included in the following B and T World Seeds flowering plant categories:
44: Cut flowers Commercial and other Recommended Varieties
53: Bedding Plant Seed List
161: Edible Flowers
185: Plant Species whose germination is improved by Smoke
698: First Year Flowering Perennials
952: Wholesale Selection
Alcea rosea Blackcurrant Whirl double annual seeds will usually germinate in 10-12 days. Normally will only germinate with light so surface sow. Sow Alcea rosea Blackcurrant Whirl double annual seeds on the surface of a Peaty seed sowing mix at about 15-20°C.
Can be sown in situ.