I have 2 auto plants in 70 30 coco perlite in 3 gallon fabric pots with dr earth dry fertilizer and I have been watering with ph water 5.8-6.2 with like 2-5 ml/gallon of calmag in it. I was putting silicon in the water but stopped doing that when I started to find problems on the leaves. I know many people do not recommend dry amendments in coco. That is not what this post is about. I mainly want to know about EC from calmag with any recommendations you may have on the flush I plan to do on there.
The plant has what looks like potassium deficiency and rust spots on some leaves and what I thought was calmag deficiency and I do not know if the plant is in lock or what so I figure I would flush with 9 gallons of ph 5.8-6.2 water with like 2 ml/gallon of calmag to rule out ph problems in the coco or nutrient problems then start back to water with calmag for it. I was told the 3 gallon pots would need 9 gallons of water to flush it. Is that for liquid nutrient grows or do I need to do 9 gallons with me only doing the calmag in the water and the dry amendments on there?
If I am using tap water with calmag do you think there is enough in the calmag to make it to where I would need to measure EC if that is the only salt based nutrient I am using? I figured with only doing the calmag I would not really need to measure EC with that being the only salt based nutrient in the water on there.
The plant has what looks like potassium deficiency and rust spots on some leaves and what I thought was calmag deficiency and I do not know if the plant is in lock or what so I figure I would flush with 9 gallons of ph 5.8-6.2 water with like 2 ml/gallon of calmag to rule out ph problems in the coco or nutrient problems then start back to water with calmag for it. I was told the 3 gallon pots would need 9 gallons of water to flush it. Is that for liquid nutrient grows or do I need to do 9 gallons with me only doing the calmag in the water and the dry amendments on there?
If I am using tap water with calmag do you think there is enough in the calmag to make it to where I would need to measure EC if that is the only salt based nutrient I am using? I figured with only doing the calmag I would not really need to measure EC with that being the only salt based nutrient in the water on there.
