Hemp
Cannabis grown for fiber, seed or CBD and legally defined by a low THC limit. The exact limit depends on where you are.
Read more about Hemp
Grow guide
Cannabis pH: what the research actually says
The short answer: aim for a substrate pH of 6.5.
Leaf Doctor
Yellowing lower leaves: what it is, and when it’s nothing
Before anything else: if you're six or more weeks into flower and it's only the bottom leaves, this is probably normal.
Leaf Doctor
pH lockout: why feeding more makes it worse
A plant can be surrounded by a nutrient and unable to use it.