Campanula (Bellflower) - Key Growing Information

Campanula flowers, also known as bellflower and Canterbury bells.

DAYS TO GERMINATION:

7-14 days at 65-68°F (18-20°C)

SOWING:

Transplant (recommended) - Sow into 128-cell plug flats or preferred seedling container 6-8 weeks before planting out. Light is required for germination. Direct seeding is not recommended. NOTE: Plants should be started in fall, winter, or early spring. Daylength sensitive plants require short days during seedling development to ensure sufficient stem length and vegetative growth before flowering under long days. Review our complete instructions at johnnyseeds.sbs/campanula-kgi.

LIGHT PREFERENCE:

Sun. Tolerates part shade.

PLANT HEIGHT:

30-40".

PLANT SPACING:

4-12". Note: 4-6" single for single stem; 10-12" for multi-stem branching cuts. Single-stem production finishes more quickly and is recommended for greenhouse production. Multi-stem or branching production may be more suitable for outdoor production, where growing real-estate is less precious. Expect yields of 8-10 stems per plant.

HARDINESS ZONES:

Annual.

HARVEST:

Fresh - Harvest when 2-3 lower buds on a stem are open. Keep upright position to avoid stem bending.

SOIL REQUIREMENTS:

Full sun to partial shade; well-drained soil high in organic matter. 5.8-6.2 pH is ideal.

USES:

Excellent cut flower.

SCIENTIFIC NAME:

Campanula medium