Bell flower belonging to the genus Campanula initiates flowering when photoperiod is short but for blossoming it requires long photoperiod. It belongs to:
Short long day plants
Longer short day plants
Intermediate day plant
Both b and c
Short Long Day plants (S-LDP) -
Plants require short photoperiods for floral initiation and long photo periods for blossoming.
- wherein
Eg. Campanula medium, Petkus variety of rye.