No, MB isn't interchangeable with the bloom in 6/9.
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6/9 & A Pinch BayBay!
- Thread starter Coconutz
- Start date
No, MB isn't interchangeable with the bloom in 6/9.
cannacultural
Active member
third week of 12/12 and I'm noticing some leaf yellowing, but only on leaves directly under the light (1 plant scrog'd out 4x4). any chance that it'd be light bleaching or something? Might up the feed a little with a dash of epsom next feed, but I'll get a better look when lights go out
throw up a pic and peeps on here can help..DJXX
cannacultural
Active member
Just took some pics at lights off. Hopefully it shows that the outer leaves are fine, but the ones under the bulb/reflector are yellowing. Same plant-
cheers for any help
if you look in the infirmary there is a couple of threads that explain whats up....maybe a lil low on nitrogen...here is a leaf chart..if you can't see the charts well hit..control and scroll it larger....DJ
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They look underfed. 6/9 is a ratio not an end all nutrient regimen per gal. Try adding 1/3 to 1/2 more micro and bloom. So that would be 9/13.5ml per gal micro/bloom. If that's not enough I'd recommend changing the ratio with more micro.
This is all assuming you are in coco since we are in the coco forum. DTW or Recirc?
EDIT: They are very yellow. I would recommend taking immediate steps toward the above before this gets any worse. Your top cola's yield will decrease significantly if that deficiency is not corrected.
MORE SULFUR!!!
It's kind of one of those unspoken things... but plants need 100ppm+ of that element in bloom. Usually in no short supply, but sometimes things happen.
Before bumping your Nitrogen levels try an Epsom Salt foliar. Use 1/4 tsp in 1 Liter of water and apply to the underside of the leafs at lights on. If the plants don't green up significantly over the next 4-6 hours then you probably should increase the Nitrogen level for a moment by 10-15% from where it is now.
It's kind of one of those unspoken things... but plants need 100ppm+ of that element in bloom. Usually in no short supply, but sometimes things happen.
Before bumping your Nitrogen levels try an Epsom Salt foliar. Use 1/4 tsp in 1 Liter of water and apply to the underside of the leafs at lights on. If the plants don't green up significantly over the next 4-6 hours then you probably should increase the Nitrogen level for a moment by 10-15% from where it is now.
That EC depends on the starting water. I always use RO. 9/13.5 shouldn't burn MOST plants. I might not leave it there for long though.
I tend to agree. But for some reason I feel adding simply more bloom may not correct his problem. The addition of Epsom with Magnesium and a foliar application may. I have little experience with foliar deficiency correction.
I'm in that same boat. The last thing I want to say at this point is "Add more of Product X to your reservoir."
cannacultural
Active member
Thanx for the responses. Yep in coco 70/30 mix, DTW.
I thought sulfur might be the go too, which was why I thought I'd add epsom salt to the mix. I had been using it but haven't been adding the extra dash the last few feeds, so could well be right.
Snow Crash: I'll try the foliar spray, good idea. Will give them a spray asap when lights come back on. I'll also add back in the extra I had been using prior to this, and keep it steady throughout the rest of bloom - from what I understand, Mg is needed more during bloom stage too.
I mix nutes fresh each feed, so easy to adjust levels. I had been feeding around 1.6 EC, but had given a couple at 1.4 (which were also the feeds without Mg). So will re-adjust my ratios back to where I had them.
I'm concerned about it, as it's on the newer leaves which will support the colas, so want to get this fixed ASAP. But it's odd that it's only occuring in the cntre of the plant (maybe just demanding more in those areas due to increased light?).
Will report back once I've put this into action. cheers again!
I thought sulfur might be the go too, which was why I thought I'd add epsom salt to the mix. I had been using it but haven't been adding the extra dash the last few feeds, so could well be right.
Snow Crash: I'll try the foliar spray, good idea. Will give them a spray asap when lights come back on. I'll also add back in the extra I had been using prior to this, and keep it steady throughout the rest of bloom - from what I understand, Mg is needed more during bloom stage too.
I mix nutes fresh each feed, so easy to adjust levels. I had been feeding around 1.6 EC, but had given a couple at 1.4 (which were also the feeds without Mg). So will re-adjust my ratios back to where I had them.
I'm concerned about it, as it's on the newer leaves which will support the colas, so want to get this fixed ASAP. But it's odd that it's only occuring in the cntre of the plant (maybe just demanding more in those areas due to increased light?).
Will report back once I've put this into action. cheers again!
cannacultural
Active member
Cheers for this mate. I'll factor that in with my feeds from now on. I knew S was important, but not in what quantity.
I've mixed up a spray as you suggested and have just given it a go. I'll keep an eye on them for the next 3-4 hours, then check again in 8-10 before lights off. I'll be doing another feed tomorrow, so will re-jig my mix then if need.
Hopefully it rights up in the next few days. thanx again
Overwatering? If the root system isn't developed enough over watering can cause a similar condition that looks like n def. is it only plants directly under the lamps?
It's one plant with a 4'x4' canopy, no way to get a plant to do that without a massive, developed root system.
Ahh good point, no doubt that things got roots.
What's the environment parameters like?
cannacultural
Active member
Yep the root system should be fine. It's currently in a 35L pot, has been for 3-4 weeks, and prior to transplant was going great guns.
Environment - it's in a tent. Have two fans running in there + extraction (passive intake). Temps are around 20-24c humidity 55-65% during lights on. Not 100% on what dark periods are, temps drop back to about 16c.
Lights just went out, and had a quick look. Seems as though the yellowing has lessened a bit since spraying it with the epsom salts as per Snow Crash's advice. But still not fixed.
I had a plant growing outdoors last summer that did something similar - went yellow in the new bud growth. I had dosed it up with epsom (in soil) and within about 2 weeks it was fine.
So when I feed next lights on, I'll give it an extra pinch of epsom in the mix and maybe give it another light spray on most effected leaves - which as I said before, are only the few right under the lamp (which seems odd...?) Anyhow, I think I'm making progress. Cheers!
Environment - it's in a tent. Have two fans running in there + extraction (passive intake). Temps are around 20-24c humidity 55-65% during lights on. Not 100% on what dark periods are, temps drop back to about 16c.
Lights just went out, and had a quick look. Seems as though the yellowing has lessened a bit since spraying it with the epsom salts as per Snow Crash's advice. But still not fixed.
I had a plant growing outdoors last summer that did something similar - went yellow in the new bud growth. I had dosed it up with epsom (in soil) and within about 2 weeks it was fine.
So when I feed next lights on, I'll give it an extra pinch of epsom in the mix and maybe give it another light spray on most effected leaves - which as I said before, are only the few right under the lamp (which seems odd...?) Anyhow, I think I'm making progress. Cheers!
How high and what wattage is the lamp? (Sorry if it's already been mentioned)
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