I am considering 10.5 on and 13.5 off but I was a little timid so this run I am 5 weeks in on 11.5 on 12.5 off but all is well and the buds are swellin up fine.. I went and hunted down something DJ Short wrote this is third party copy/paste but like way cool dudes
Something DJ Short wrote.
After many years of first-hand experience breeding herb indoors as well as outdoors, I am of the opinion that the two most influential factors involving phenotypic variation and expression among current indoor herb breeding projects are the photoperiod (hours of light per day) and the angle of light in relationship to the growing plant.
Specifically, I find the single most powerful influence to the Indica dominant phenotype is the traditional 18/6 veggie cycle and 12/12 flowering cycle. The 18/6 veggie and 12/12 flower cycle is an attempt, however poor, to mimic the Indica-producing photoperiod. It is my belief that this light cycle strongly influences for Indica phenotypic expression.
Sativa phenotype characteristics will manifest under a more equatorial photoperiod, closer to a 13/11 veggie cycle and an 11/13 flower cycle. This is the light timing range to use to elicit more Sativa dominant expression from your plants.
As for the exact photoperiod formula that I incorporate into my growing/breeding regime, this will presently remain a trade secret. My advice is to experiment with different photoperiods, keep good notes and pay attention. Avoid the 18/6 and 12/12 photoperiods, while tweaking the times a bit differently with each breeding cycle until more desirable results in the finished product and their offspring are noted. Here's a hint: work in half-hour increments or a little less, and good luck!
Angle of light simply refers to the physical angle of light source the plant is dependent upon for growth. Perhaps the greatest difference between indoor and outdoor environments has to do with the angle of light received by the plant. This is also one of the greatest seasonal differences between the Sativa and Indica producing regions.
Outdoors, the main light source is the Sun, with minor influence coming from nearby reflective surfaces. As a plant grows taller and broader outdoors, that angle of light from the sun changes very little in relationship to the growing plant.
Seasonal changes in angle of light increase the further away from the equator one gets. At the equator there is the least amount of seasonal change in angle of light, only about 20°, whereas at the 45th parallel that change is as great as 45°. At the 45th latitude, the Summer Sun is high in the sky while during early Spring and late Fall the sunlight comes from much lower in the sky. The farther one goes from the equator, the greater the difference in seasonal changes regarding angle of light.
Indoors, the lights typically range from a few inches to several feet from the plant. As the plant grows taller, its physical relationship to the bulb's angle of light changes considerably. Most indoor grow rooms have relatively low ceilings, therefore, raising the bulbs may maintain a similar angle of light early on, but eventually the angle changes. The same differences may be noted among plants directly below the bulb and the plants off to the side of the room farther away from the bulb.
Circular light shuttles tend to emulate the arctic summer and create a confusing signal completely unknown to the equatorial Sativa. Straight-track overhead light shuttles are more conducive to inducing the Sativa phenotype.
Many indoor growers try to get their budding plants as close to the light source as possible. Though this may increase bulk production of both bud and trichome, I find that this practice tends to destroy many of the finer aromatic qualities of the herb.
Buds too close to the light tend to express nothing beyond the lower lemon/lime aromas of the fruity spectrum. Sometimes the aroma is no better than a strong chemical/astringent odor and flavor, especially those under High Pressure Sodium light systems. The finer berry flavors tend to favor more distance from the bulb, and will manifest more strongly under High Ultraviolet Metal Halide light systems, especially during the latter stages of flowering.
Something akin to a gymnasium building with high ceilings and super 5000W lights hung far from the growing plants, set at a Sativa-tweaked photoperiod, would be the ultimate indoor grow-op to coax Sativa phenotypes.
Sweet spot fantasy
Nothing will ever rival the great outdoor sweet spots for quality cannabis production. Hopefully, someday, somewhere, someone will be daring and lucky enough to get away with re-establishing some of the great genetic lines in their specific region of origin sweet spots.
Equatorial Sativa varieties are of interest for quality herb production (Thailand, Oaxaca, Colombia, Central Africa, etc.) as the Indica zones are more renowned for hashish production. Parts of Nepal tend to produce both excellent hashish and fine Sativa buds, with some plants reportedly living longer than two years!
I hope that I am able to live long enough to once again experience the joy associated with the fine herbal products from the great regional sweet spots of near ancient lore. It has been a long time and I am looking forward to the day.
what if you flower 10/10....if your plants think 10/10 is a full day, then you will gain 1 day every 6 days(with the extra 4 hours each day)...so a 60 day flower will be complete in 50 days
...this is a thought i've been pondering over for a while now...seems to make sense in my twisted mind
...idk