I'm a believer in less is more as well.. Keep in mind I'm feeding every 48-72 hours instead of every 12-24 hours like most coco growers.. This plays a huge role in EC value. If I was feeding a flood table of rockwool 3-4 times a day I would reduce my EC wayyy down to probably 1.4-1.6 EC.
In 20 gallon pots of Coco with 6 ft tall plants feeding every other day you can easily run 2.0-2.2 EC, especially during mid bloom. I have tried lower EC and the plants do not like it. They will start to show deficiencies and not yield nearly as much. The Fox tailing on the one plant is totally genetics it fox tailed in our other rooms that are LED as well.
I supplement Co2 using a liquid propane burner with a Titan Controls controller (forget the model). I'm running 1200-1500 PPM of co2.
Environment:
Lights On: 82 °F / 50% humidity
Lights Off: 72 °F / 45% humidity
I achieve the above environmental variables thanks to 2 x Quest Dual 155 Dehumidifiers and 2 x 3 ton mini splits.
I've experimented with low EC values in bloom like 1.4-1.6 and its too low for the plants I'm growing in the environment I'm pushing them in. You will start to see yellowing and deficiencies within a couple days if the EC drops that low in the coco. This is why I quit doing feed/water/feed/water and now I just feed every 2 days @ 2.0-2.2 EC depending on stage of growth..
I scale my feeding from 1.2 VEG up to 2.2 by mid-bloom then taper it back down until the last 14 days of bloom where I feed ONLY Pure 15 PPM RO.
I have documented all my grows in journals and I know it sounds crazy to have that high of EC but the plants I'm growing each take up a 25-30 square foot area. I tried the small pots and feeding 2-3 times a day and its not for me. I'm a coco grower but prefer to have the bigger root system and water less frequently. WOrks for me, I'm pulling 2-3 pounds per plant every harvest.
House & Garden Cocos Base Nutrients A&B
Ionic PK Boost
I add 1 sachet of shooting powder by House & Garden week 4 of bloom, that's the only time I apply it, usually this is when I will bounce off the 2.1-2.2 EC on my truncheon.
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