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Discussion in 'First Time Marijuana Growers' started by Zacharyw1818, Jul 31, 2019.
Just hoping I can get a few opinions on what is wrong with my plant.
Looks like calcium deficiencies
Calcium deficiencies are more likely to appear when…
Grower is using filtered or reverse osmisis (RO) water to feed plants – the amount of calcium found in tap water varies, but some tap water has enough calcium to prevent calcium deficiencies
PH is Too Low – If grow medium is acidic (below 6.2 pH, Calcium can get locked out even if the Calcium is physically there)
Growing cannabis in hydroponics or coco coir without supplementing extra Calcium (it’s recommended to use a Calcium supplement in hydro or coco)
When growing in soil that hasn’t been supplemented with calcium (usually from dolomite lime)
Too much potassium can also sometimes cause the appearance of a calcium deficiency
Outdoors – calcium deficiency is more likely to appear in acidic soil (below 6.2 pH)