I Just finished a batch of Blueberry from One plant. Yielded over 3.5 oz's. I didn't do a thing but Jugs of drinking water 22 hrs. of sunlight and attention for the first three weeks of growth. No PH checks no Nutes "nutrients" . People forget that these plants thrive on their own all over the world. Just water them and pay attention to lighting / heat / humidity. After three weeks or so you can start to introduce nutrients to the plant. I do this when transplant of the pots is done. I can also say, every strain is different , and a CLEAN .....SANITIZED environment is key to growing.