Critical420
Member
I've got seven large kush plants in the 6th week of bloom right now, and I have noticed what looks like calcium deficiency in some of the leaves that are surrounding the largest colas on two of the plants that are closest to the lights (12 inches away from the CMH315's). This deficiency has occurred two times on the days after I watered/fed the plants. I am wondering if the deficiency is caused by the water level almost touching the net pots and causing some type of trauma to the roots. I read a thread on a different forum where a guy said his growth slowed when he filled the buckets up to the net pot. I have good air bubbling in the buckets, my nute schedule has more than enough calcium and magnesium in it, and the PH is 5.6. I let the temps go down to 68F at night and up to 74F during the day. I use reverse osmosis water so I make sure to make up for it with a little extra cal/mag.
Other than this issue, the plants are thriving and well over 90% of the leaves are still green and healthy. I have less than two weeks to go before harvest so it's not that big of a deal. I know that when the plant realizes it is dying it will take what it needs from the leaves if it cannot get enough through the roots. But I would like to know for future reference if this can be avoided so the colas get all the food they need to grow fat and healthy without any deficiency. It just started a few weeks ago on the day after I watered, and then again today after watering/feeding last night.
Should I try watering/feeding more often? I let the water level do down to about 4-5 inches from the bottom of the bucket (average every 3 days) and then I fill them up to just under the net pots. Maybe I should water more often and leave a larger air gap below the net pots? Any input would be appreciated!
Other than this issue, the plants are thriving and well over 90% of the leaves are still green and healthy. I have less than two weeks to go before harvest so it's not that big of a deal. I know that when the plant realizes it is dying it will take what it needs from the leaves if it cannot get enough through the roots. But I would like to know for future reference if this can be avoided so the colas get all the food they need to grow fat and healthy without any deficiency. It just started a few weeks ago on the day after I watered, and then again today after watering/feeding last night.
Should I try watering/feeding more often? I let the water level do down to about 4-5 inches from the bottom of the bucket (average every 3 days) and then I fill them up to just under the net pots. Maybe I should water more often and leave a larger air gap below the net pots? Any input would be appreciated!
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