Table 1: The effect of light regime on the germination characteristics of Calluna vulgaris seeds at 15°C. Storage period at room temperature before trial: 6 days. Mean values ± standard deviations. In each column, groups that showed significant differences ( ) are indicated with different letters.

Photoperiod
(hours of light per day)
Number of seedsDays to first radicle emergenceMean time of germination (days)Percent germination
(at day 126)

84 × 10015 ± 1.7a34 ± 3.0a90 ± 7.0a
164 × 10021 ± 3.8a41 ± 3.9a70 ± 7.9b