Here is a pic of a plant with days from harvest coloring. Run long and natural.
View attachment 4049212
By far, many nutrient makers will chart poorly for natural blooming. They formulate their line with too much P&K (more so for the P) in bloom. They drop the N down too early and raise the P too high for simply changing over at the flip in lighting times.
This high P, will force the plant to finish, or ripen faster then it really should for reaching the plants potentials.
This early high P use will, cause the plant to yellow out faster (from the bottom up). Like I said, this train of thought is to ripen the plant faster and they say your getting bigger buds that way. Not really! It actually takes away from the plants actual potential yield
and quality!
Many of these makers will also have a P&K booster. These will make for an even more faster ripening of the plant. The P is forcing a finish, before the plant actually matures the budding at a natural rate of growth.
Some, and I mean a
very few nutrient lines will have this change over in a better balance and then supply a mid bloom P&K booster that is used till a point and then stopped. Usually at week 4 you start and stop at week 6 with that.
Hesi is a line that does that, and they actually increase the N in the base bloom a bit to help offset the P increase. Also to help out the plant in stretch, when it could actually want or need a tic more N for the stretch.
Plants run properly, will get some natural coloring rather close to the finish. They run longer then many think this way.
A simple solution to this problem with these "common" nutrient lines. Is to simply run the veg for the first 2 weeks into bloom. Then change to 50:50 veg and bloom for a week and then at week 4, simply go all bloom.
Give it a shot and see if that helps. You'll need to run a week or most likely 2 longer. Your yield and final quality will increase.