My plants are getting big but I have been using fox farm big grow only 1/2 table spoon and they are thriving but I am afraid to use it because I feel like it is a bit harsh for the plant and I would like some suggestions on the feeding and what is the best thing to use
Read the ppm discharge water. This is the water that drains after being feed or watered.
If the discharge water ppm is over 500, you are over feeding. If the discharge ppm water is under 300, you are under feeding. The reading between 300 and 500 is perfect and keep up what you are doing.
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