It's like they're not growing at all, really frustrating. What do you think is the problem? Are they growing in the shade?
I'm using Plagron 13-14 and Plagron Alga Bloom for nutrients.
This plant is doing pretty well, is it staying in this spot? The lack of sunlight as well as possibly too high temperatures can affect its growth. The ideal would be to control the light received with a lux meter.
Cannabis really needs at least 6 hours each day of direct sunlight on its leaves to grow to its best potential.
Indoors behind a window with minimal direct light and mainly reflected light just won't be adequate for best growth.