Uncle Ben
Well-Known Member
I see it all the time, the first thing out of an in-experienced's grower's mouth is "have you checked the pH?" when it comes to a plant problem. If you don't know what the member's problem is, the forum favorite remedy - pH, is not going to help, nor make you look any smarter to the masses. pH adjusted water, especially using organic acids such as citric, will not have any long term corrective affect on most soils - soil is a powerful buffer.
Then it's the old "add epsom salts"....another forum paradigm that won't go away. Most folks only want to help and that's OK, but you can actually do more harm than good if the grower takes advice that is not correct.
pH - Cannabis is quite pH tolerant, it's a nutrient elemental uptake issue (not leaf cupping, wilt, lack of buds, etc.) and as long as the pH of the soil is not totally wacked out i.e. 5.0 or 8.6, you're OK. Hydro is different, a lower pH is usually recommended depending on foods used, type of medium, etc.
Get rid of the cheap moisture and pH meters - they do more harm than good.
Epsom Salts additions - Sorry folks, it's not a magic cure-all as you would like to believe. Since folks provide Mg in some form or fashion to their faves, Mg deficiencies are actually quite rare. An Mg deficiency will show up in the lower to mid level leaves as a chlorosis, a pale yellow or whitish-yellow background in the leaf with green veins. DO NOT OVER CORRECT with 2 tblsp./gallon if you are sure there is indeed a Mg deficiency. By over-correcting, you're gonna be doing another "aw shit" by inducing a deficiency of another element, say..... calcium. The concept is called nutrient antagonism. http://www.totalgro.com/concepts.htm
Good luck,
UB
Then it's the old "add epsom salts"....another forum paradigm that won't go away. Most folks only want to help and that's OK, but you can actually do more harm than good if the grower takes advice that is not correct.
pH - Cannabis is quite pH tolerant, it's a nutrient elemental uptake issue (not leaf cupping, wilt, lack of buds, etc.) and as long as the pH of the soil is not totally wacked out i.e. 5.0 or 8.6, you're OK. Hydro is different, a lower pH is usually recommended depending on foods used, type of medium, etc.
Get rid of the cheap moisture and pH meters - they do more harm than good.
Epsom Salts additions - Sorry folks, it's not a magic cure-all as you would like to believe. Since folks provide Mg in some form or fashion to their faves, Mg deficiencies are actually quite rare. An Mg deficiency will show up in the lower to mid level leaves as a chlorosis, a pale yellow or whitish-yellow background in the leaf with green veins. DO NOT OVER CORRECT with 2 tblsp./gallon if you are sure there is indeed a Mg deficiency. By over-correcting, you're gonna be doing another "aw shit" by inducing a deficiency of another element, say..... calcium. The concept is called nutrient antagonism. http://www.totalgro.com/concepts.htm
Good luck,
UB