This is from,
PH - Potential Hydrogen - The Manual - Polled
Lockouts and Other Issues ( Effects on Autos Growth / Yield): The Manual
So now you're getting ph down... there are some great vids above that describe in even more detail the concepts we're discussing.
Allow me to iterate something on the matter of Autos, Yield, and PH.
Example 1:
A 70 Day Autoflowering Strain.
Say ph is good for the whole grow excepting one bad swing:
often PH issues don't show for 2 or 3 days... sometimes longer.
Calculate:
Plants good to 14 days.... then a PH issue occurs
days 14-16 - hasn't shown up yet 2 days
day 16 you notice and begin corrective action
takes 2-5 days to correct back (we'll say 3)
then 2 days for the plant to catch up again.
so now you've lost 7 days out of 70... and whats worse... during the beginning of peak vegetative phase.
so 10% of your total grow time... but lets break it down a hair more:
70 day variety... shows flower at roughly 21 days... really starts flowering at 28 - 35 days.. so we'll call it a 30 day veg cycle.
so 7 days you lost of 30
7/30 = 23.333% of the total veg time of the plant. and since veg is size, which is what supports yield... you've cut your yield drastically. The problem is further compounded by another factor we'll discuss later in this article.
