Colombian Jack is the result of crossing Nebula and Black Jack, two great genetics, with predominance sativa (70%). My experience is been a bit different by the description of Kannabia, i think also all the problems came out in this growth are caused by an imbalanced Ca/Mg rate and this is been my mistake.
The plant had a great growth during the vegatation phase responding well to the topping tecnique but the first two weeks of flowering were very bad: growth was low without showing the real sativa power so she ended up looking like a bush and producing a small harvest.
After a long time i'm closing this diary with the smoke review: i start giving one more star because the taste and the high make me fall in love with this strain, it has a truly sativa effect perfect for all the days activities with a soft smoke; the taste is delicious for me, i feel for first the tipical taste of the green apple a bit acid then the sweet of tropical fruit with woody notes aftertaste. For sure I will do this strain again. I tried also to do Fresh Frozen DHO from trimmed leaves and i had a great results both in terms of weight and taste.