At least 4 weeks left.
I am not on the same side as Organoman on this one..
Now if she was my plant I would be worry about the fan leaves being fried so early.
Looks like a K def from here. It would explain also stunt issue you describe.
Looking at data your container seems too small. You are having a 2ft plants in a 3gal pot.
This is a little small for a plant to thrive and have access to enough nutrients and minerals,
until you supply the plant with them. You increased your feeding this week, great idea...
but a plant's root system is like a pay check it always take a least a week for you to see the results =)
Previous weeks you only supplement the plant with about a quarter strength of bloom and did not give any of the other BioBizz products that are meant to be used together...
So I would not feed plain water until harvest!! I would look at Biobizz feeding chart and try to follow it.
Biobizz is organic and can be use until harvest, but last week your plant won't need it.