An apparent potassium deficiency - Page 2 - Growing in Coco Coir - International Cannagraphic Magazine Forums

Student Of Life · 12-30-2017, 11:30 PM

To everyone else - quick update. I found a few flaws in the room and have started working towards sorting them out. Issues;

1. Miscounted weeks and used Big Bug a week too long. Meant to use it from when bud sites form to the end of week 5, but used it to the end of week 6. Was also using too much of it I believe. Kept it at half the label dosage, with a ratio of their base nutes to supplements at 2:1, but I believe I can fine-tune it better next run by using less than that. The leaf damage seems to occur after the stretch and during Big Bud weeks, so it may be a P or K toxicity leading to lockout issues and/or salt buildup.

2. Environmental mistakes. Few issues here. Top of canopy in middle of the lights is ~81F, while the rest of the room is between 67-73F. Need much better circulation next round to bridge that gap. Also suffering from poor VPD, as canopy relative humidity levels read 44-46%, which doesn't play well with the 80+ heat. Having too large of night-time swings as well, with temperature swings as high as 20 degrees (!!!) and humidity swings as high as 15% (though the humidity swings only last for a half hour or so as the dehuey gets to work at night). Will have to make some changes next run to get this room proper comfortable for these girls.

Overall not a bad run. Today marks day 1 of week 8, so most of the girls are just about ready to go. Few of them could go another week, but in a few days they'll have to come down as a group with the way I run the rooms. The woes of pheno hunting. Few killers in here for sure though. Flushing has been going well. Runoff ppms are ~100. Here's some pics for you guys and they're color corrected this time

Almost forgot, these are all Exotic Genetix Black Mamba. Doing a bit of a pheno hunt.

Sexy hybrid - https://imgur.com/CKh5Lvs
Super short indy leaner - https://imgur.com/aiIn6PX
Personal favorite - https://imgur.com/ksQGNQt
Weird one with crazy frost and weird growth - https://imgur.com/UpbDACA
Close up - https://imgur.com/EsoKLpg
Under the canopy - https://imgur.com/XTFa6aR
Next round - https://imgur.com/Q5grhsY
Next round - https://imgur.com/sVsqbJv

12-30-2017, 11:30 PM	#11
Student Of Life Member Join Date: Dec 2016 Posts: 90	To everyone else - quick update. I found a few flaws in the room and have started working towards sorting them out. Issues; 1. Miscounted weeks and used Big Bug a week too long. Meant to use it from when bud sites form to the end of week 5, but used it to the end of week 6. Was also using too much of it I believe. Kept it at half the label dosage, with a ratio of their base nutes to supplements at 2:1, but I believe I can fine-tune it better next run by using less than that. The leaf damage seems to occur after the stretch and during Big Bud weeks, so it may be a P or K toxicity leading to lockout issues and/or salt buildup. 2. Environmental mistakes. Few issues here. Top of canopy in middle of the lights is ~81F, while the rest of the room is between 67-73F. Need much better circulation next round to bridge that gap. Also suffering from poor VPD, as canopy relative humidity levels read 44-46%, which doesn't play well with the 80+ heat. Having too large of night-time swings as well, with temperature swings as high as 20 degrees (!!!) and humidity swings as high as 15% (though the humidity swings only last for a half hour or so as the dehuey gets to work at night). Will have to make some changes next run to get this room proper comfortable for these girls. Overall not a bad run. Today marks day 1 of week 8, so most of the girls are just about ready to go. Few of them could go another week, but in a few days they'll have to come down as a group with the way I run the rooms. The woes of pheno hunting. Few killers in here for sure though. Flushing has been going well. Runoff ppms are ~100. Here's some pics for you guys and they're color corrected this time Almost forgot, these are all Exotic Genetix Black Mamba. Doing a bit of a pheno hunt. Sexy hybrid - https://imgur.com/CKh5Lvs Super short indy leaner - https://imgur.com/aiIn6PX Personal favorite - https://imgur.com/ksQGNQt Weird one with crazy frost and weird growth - https://imgur.com/UpbDACA Close up - https://imgur.com/EsoKLpg Under the canopy - https://imgur.com/XTFa6aR Next round - https://imgur.com/Q5grhsY Next round - https://imgur.com/sVsqbJv
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