Campanula

Culture Sheet

Growing Temperature:

65-70° F

Holding Temperature:

50-60° F

Soil PH:

5.8-6.2

EC (What is EC?):

1.0-1.2 pour through method

Fertility:

Apply a constant liquid fertilizer program, 75-125 ppm at each watering. For Controlled Release or Slow Release Fertilizer, see your preferred supplier for recommended rates for incorporation or top dressing, as it varies by fertilizer.

Vernalization:

Cold required for 10-15 weeks at temperature below 40° F.

Pests & Diseases:

Aphids, onion thrips, slugs, snails, western flower thrips, spider mites, aster leafhopper, leaf and root-knot nematodes.

Crown rot, rot (Sclerotium), impatiens necrotic spot virus, aster yellows, leaf spots, powdery mildew, root rots, rust, damping-off, Botrytis blight, Verticillium wilt.

Potting & Timing:

Plant large vernalized plugs in early spring.
Small plugs are commonly potted in the summer of the year prior to sales.

Moisture:

For potting soil use commercial planting media.

Planting Level:

At crown level.

PGRs/Pinching:

May not be required. One or two 2,500 ppm applications of Daminozide (B-Nine or Dazide), seven days apart, can be effective at reducing plant height when applied just as the flower stems are beginning to elongate.

Lighting:

Long days required for flowering.

Other Comments:

Research has shown that most campanula cultivars display better quality characteristics, such as a higher bud count and flower size, when grown at cooler temperatures.