(8 weeks) and that all could be triggered by providing a 12 h night duration which
is the period of darkness that is critical toflowering. The similar responses of many
strains to darkness suggests they are similar in geographical latitude origin.
A different type offlowering pattern also seen in cannabis strains is that of
autoflowers. These strains automatically switch from vegetative state toflowering
state, irrespective of night length. We have observed autoflowers to initiateflow-
ering within 4 weeks after germination. In the case of“super autos”, they can be
harvested within 100 days after germination (David 2014 ). The origins of the
autoflower expression is not fully understood and it’s significance is unknown.
Fig. 19.1 (Top) Growth morphology of asativa-type strain of Cannabis. (Bottom) Comparison of
the leaf morphology of‘Moby Dick’(75%sativa) on theright sidewith‘Blue Cheese’(80%
indica) on theleft side
398 Z.K. Punja et al.