for Malawi - use 12/12 from seed  - 3 weeks veg then before "transition stage" give plant 24-36hr dark  time  then a 13/11 flower time switching to 14/10 in late flower -- this will work well for 100% sativa strains increasing flower times by 1-2 weeks, Been wanting to run Malawi sub-post to be one of the worlds strongest strains !!!!!!!!!!!!!!!!!!!!  ( need to find some more 100% sativa strains to run with) keep us posted -