At this moment, THC has few sedative effects due to low CBD and CBN levels.
Terpene – aromatic molecules – production is also at its peak, developing gorgeously aromatic floral clusters.
3) When 70% of these trichome heads are milky and 30% amber, it is the perfect time to harvest mostly Sativa hybrids and long flowering strains (like Haze). It is also the best moment to harvest plants for making hashish.
If you have a digital camera with Macro function, you can take close-up shots and use a photo-editing software to zoom the pictures and observe the trichomes.
At this moment, THC production is at its peak, while CBD levels are still low and stable, since molecules quickly become THC.
If growing mostly Sativa hybrids , make sure that all resin glands are fully developed and 30% of them are amber before harvesting your plants.
Regarding trichomes and what they tell us, Robert C. Clarke – in his book “Marijuana Botany” – states:
If harvested at this moment,the effect will be heavy and intense, and the acid citrus taste becomes sweeter, reminiscent of the sweet smell of fermented lemons, similar to Lemon Heads sweets. The effect is now body relaxing and sedative, being a perfect smoke for relaxing before going to spleep.
Many growers harvest their cannabis plants at this moment because they prefer a more clear and cerebral psychoactive effect.
Here you have a translation of an article from TGA Subcool about the harvest of cannabis plants. Both the effect and taste of marijuana are directly r
Macro shot of mature trichomes. Photo by Dynasty Genetics.
Beautiful cannabis bud by Professor P. Dyntasty Genetics.
Begin planning for harvest when the flowers ripen, between six and eight weeks after the beginning of flowering.
The odor reaches its peak at the same time the trichomes begin to fluoresce in the light, twinkling like little crystals. In some varieties, the trichomes are so prominent that the whole bud sparkles. Using a magnifying glass, a photographer’s loupe or a microscope, monitor the buds’ progression to the peak of ripeness by watching the resin in the gland tops.
The viscous, sticky liquid that accumulates contains terpenes and cannabinoids, which are produced on the inside membrane of the trichome cap. As the resin accumulates in the cap, the flower odor becomes more intense.
Under magnification, you can see individual glands turning from clear to amber or a cloudy white. These colors indicate that THC is beginning to degrade into two other cannabinoids, cannabicyclol (CBL) and cannabinol (CBN), which are not nearly as psychotropic as THC.
In addition to genetics, flowering time is also affected by light intensity and total light received on a daily basis, ambient temperature and nutrients.
Macro shot of immature trichomes.
When the trichomes begin to change from clear to amber or cloudy white, the buds should be harvested—this is the peak moment.
Here’s all the details you need to know about the best way to determine the picking time of your marijuana buds: Ripening facts, trichomes and more.