A question from a fellow grower:
What should my ppm be in flower stage for white widow and blueberry
This can vary according to what type of system, and choice of medium.
Another factor would be, your lighting. Help me out 
Before posting a grow support question; We need some information; In order to best address your issue/s.
Copy/Paste/Place this at the top of your support request:
Strain:
Indoor or Outdoor?
Size of space:
Soil or Hydro?
Medium used:
PH:
EC/TDS ppm levels:
Temperature:
Humidity %:
Light system/watts?
Answering these questions before you submit a support question will help our staff do a better job of advising you through your grow.
We appreciate your business and want to support you all the way to harvest. Peace.lw
It could depend on many different factors, what is the recommendations of the product itself and are you using r/o or tap water and what is your starting ppm in the water. Are you asking the ppm of your solution you pour on your soil? Flood and drain coco filled pot or rockwool table flood to drain or ebb and flow? Or Deep Water Culture reservoir’s ppm?