Hi I was wondering if anyone had an opinion as to what this deficiency is at first I thought it may have been calcium so I added a little cal mag to my water but it seems to be spreading. The medium is sunshine mix 4 , bit of earthworm compost and perlite, the top bit is filled with perlite in hopes of keeping fungus gnats at bay. I haven't fed anything besides the last feed which was 1/4 dose of Gh GO veg and abit of cal mag. the strain is Black indica and hash plant both plants are exhibiting the same thing but the two pics are of just the black indica.
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this is more than one problem now., are you watering through the perlite? You said misting, does this mean foliar feeding only, what is the % moisture of the soil?
You are getting gnats because your environment is wrong mate, ergo too wet, gnats like damp wet, so do fungus, go figure.....
Your numbers must be out, there is little chance this is pH 6. It looks to all the world like you have been over watering it, the plant is pale, lacking n and S and mg and Fe. The red spots are symptomatic of calcium, potassium and the end leaf damage is showing P.
Just because you added it, dont mean its being used. Higher rates of sodium can delay the uptake of other nutrients, esp things like calcium, magnesium, manganese potassium, you appear to suffering from all of these cation problems. This would be pointing me at environmental. may be you been getting hot temps, so hot your O2 is dropping out, so causing a burst of bacteria, spiking pH upwards and fixing your cations?
ph is a consequence of something else. it is not a root problem. Root problems, eg soil profile collapse, causes ph fluctation, not the other way round. So may be stop over loading the plant with nutrients period. You may have tipped the CEC balance with all that perlite so locking out nutrients like Potassium, Calcium etc. You may have added too much P and this may have bound with your calcium inputs under the strain of rising pH, itself a consequence of cation overload, a lack of oxygen etc. you may be losing Fe, it may be your media ph it could be your plant pH?
Dont be coy or too macho to admit you made an error, we all make mistakes, we can however help you better if you are open about your habits and possible gardening faux pars.
New plants contrary to popular myth need far less soil moisture then a plant in bloom. I run my little ones around 30-40% in the root zone, while the canopy or above ground RH% i do keep higher, in keeping with delicate leaves an shoots where my blooms at >60% soil moisture and drier air %. Plants that are over watered at early stages, often have a less well developed flavor profile. it is certainly true that growers of tomatoes deliberately keep young plants searching or water and food in order to boost the end product quality, the same principle applies to Cannabis.
i sense you have over watered this, over fed it, may be the soil has been allowed to get too hot or cold and you have reached for a bottle to fix an environmental matter. Soils like the one you are using typically have enough food for 4 weeks growth and plants with small roots, really cant handle lots of food, esp P.
P is unstable and seeks out other elements with which to bind. I would chuck it and start again without nutrients and or perlite. Your soil has been blended by the maker, you are adding things without understanding how this affects the soil current and so what this does to elements being held in it or not.
Leave the perlite out, buy some nematodes to treat your gnats. Stop over watering
