I thought it may be a nitrogen deficiency, except that the middle leaves (but close to stem) were yellowing and not the lower leaves so I thought it could be a Mo deficiency.
But I really think it is has something to do with the dirt being so dense...
But I am going to try your idea on put a...
The perimeter fence is the way to go. A lot of people say to use fishing line. Ed Rosenthal told me to use 100 test fishing line at 2 and 4 feet. I use heavy duty weed wacker line instead. Its MUCH strong than 100-pd test fishing line, and a lot easier to get when you are not near the ocean...
I have these plants which are Armageddon Sativa supposedly with a 7 week flowering time. They are outdoors in soil in 18 gallon plastic containers (not yet budding), a 15 gallon garden pot and a 10 gallon smart watering pot (both budding<forced>). I am using a moisture meter to find out how...