hey everyone im starting week 8 of my gdp and alot of the fan leaves have turned yellow now, am i running into mg toxicity ? or is this something naturally happening at the end? all of the sugar leaves look fine tho
Should be going yellow now and many go yellow before 8 weeks, the plant completes it's life cycle and is considered an annual so this is all part of the final push and thus the plant is using up all the available nutrients from the fan leaves to help power ripening and final flower swelling. This also opens up the interior of the buds to more light at the end that may have been shaded in early flowering and allows them to mature more completely. All good things!
The roots have also changed their uptake of nutrients at this point and despite possibly having plenty of available N in the medium they no longer will take it up in large amounts because it's entering the ripening stage and they just don't need it. This is where you are hopefully giving it plenty of clean fresh water so it's clean and smooth when finally dried, cured & smoked.
thanks alot guys, i wanted to take it to week 9, you think giving it pH'd water will do for week 8 and 9? or should i still give it light nutes for week 8 and pH'd for 9?
And do not harvest until the calyx's are swollen, buds solid & the trichomes are getting cloudy instead of clear but do not wait until they go dark amber because then they are staring to degrade. I like to harvest when they are just going from clear to cloudy and you will find that you get just a little amber in there after proper drying & curing if you time it right. That should give you good full spectrum potency and the full range of medicinal effects.