I am growing in soil. I bought this "three in one" soil tester: https://www.amazon.com/dp/B01M1CRG6R/ref=cm_sw_r_em_apa_NodAybXHZDR4Z
However I am not sure how accurate this thing is. Hence I wonder what do you guys use? Do you test water or soil? My understanding is that soil grow PH level should be around 7, right.
However I am not sure how accurate this thing is. Hence I wonder what do you guys use? Do you test water or soil? My understanding is that soil grow PH level should be around 7, right.