WEEK 6 IN FLOWER

canna_montana · Jul 20, 2021

The only thing I have changed up to this point is I started cutting my cal/mag strength in 1/2 as of this last fertigation feed. I haven’t run into any issues but I started to notice changes in my leaves. I wanted to ask you guys to look at the photos to make sure I’m just seeing nutrient burn or cal/mag deficiency… or is it looks like something else?

Boogierook · Jul 20, 2021

It’s hard to tell with the color of the lights. But I would lean towards a cal mag issue with those rusty looking brow spots/patches. Are you noticing this all over the plant or just the tops? Calcium as I understand is a immobile nutrient meaning that deficiency caused from lack of calcium shows at the top of the plant first, as the plant can’t pull calcium out of the lower leaves to keep building up top. would also double check the ph to make sure that ur plants roots are in the range to absorb calcium. The leaf tips do look a little burnt though.

SSHZ · Jul 20, 2021

Most likely mites are causing your spots on the leaves…..definitely not a cal/mag issue.

canna_montana · Jul 20, 2021

Boogierook said:
It’s hard to tell with the color of the lights. But I would lean towards a cal mag issue with those rusty looking brow spots/patches. Are you noticing this all over the plant or just the tops? Calcium as I understand is a immobile nutrient meaning that deficiency caused from lack of calcium shows at the top of the plant first, as the plant can’t pull calcium out of the lower leaves to keep building up top. would also double check the ph to make sure that ur plants roots are in the range to absorb calcium. The leaf tips do look a little burnt though.

I am noticing it fairly evenly all over.

curious2garden · Jul 20, 2021

canna_montana said:
The only thing I have changed up to this point is I started cutting my cal/mag strength in 1/2 as of this last fertigation feed. I haven’t run into any issues but I started to notice changes in my leaves. I wanted to ask you guys to look at the photos to make sure I’m just seeing nutrient burn or cal/mag deficiency… or is it looks like something else?
View attachment 4947643 View attachment 4947646 View attachment 4947649 View attachment 4947651 View attachment 4947652

That is a lovely fuschia to the purple. I had a dress almost that color. I still miss it.

Boogierook · Jul 20, 2021

canna_montana said:
I am noticing it fairly evenly all over.

Could be that nutes are locked out. What medium are you growing in? What nutes do you feed? How often/how much? Do u adjust ph when you water? If ur plants roots are locked out ur bound to experience a range of deficiencies even if the nutes are present in the soil

canna_montana · Jul 20, 2021

Boogierook said:
Could be that nutes are locked out. What medium are you growing in? What nutes do you feed? How often/how much? Do u adjust ph when you water? If ur plants roots are locked out ur bound to experience a range of deficiencies even if the nutes are present in the soil

Here is my set up:
I’m growing in coco. Feeding with the full line of Fox Farm nutes. I keep ppm 1200-1400. And PH before each water at 6.0-6.3. I flushed over the weekend (7/17). And water/fertigate depending if they feel light. I usually end up everyday to every other day.

Boogierook · Jul 20, 2021

canna_montana said:
Here is my set up:
I’m growing in coco. Feeding with the full line of Fox Farm nutes. I keep ppm 1200-1400. And PH before each water at 6.0-6.3. I flushed over the weekend (7/17). And water/fertigate depending if they feel light. I usually end up everyday to every other day.

I don’t grow in coco so I’m not that familiar with it. I did some quick research and saw that most people seems to use a ph of close to 5.8. I found this chart which would explain the possible calcium deficiency you are seeing. You can see that calcium is best absorbed on the more acidic side of the acceptable range for a soilless medium. If you are consistently watering at the more basic end of the acceptable range it would make sense that gradually, over time you may run into a calcium deficiency. Again I am not too familiar with coco but I think it’s something you could look into.

EDIT: a slight ph fluctuation can actually be beneficial for you plants and allow them to absorb the full range of nutrients they need. Perhaps your a little too basic one time, then a little too acidic the next, All within the “acceptable range” of course. this may help your plant absorb certain nutrients that are only easily accessible on one side or the other of the supposed “acceptable range”

canna_montana · Jul 20, 2021

Boogierook said:
I don’t grow in coco so I’m not that familiar with it. I did some quick research and saw that most people seems to use a ph of close to 5.8. I found this chart which would explain the possible calcium deficiency you are seeing. You can see that calcium is best absorbed on the more acidic side of the acceptable range for a soilless medium. If you are consistently watering at the more basic end of the acceptable range it would make sense that gradually, over time you may run into a calcium deficiency. Again I am not too familiar with coco but I think it’s something you could look into. View attachment 4947721

EDIT: a slight ph fluctuation can actually be beneficial for you plants and allow them to absorb the full range of nutrients they need. Perhaps your a little too basic one time, then a little too acidic the next, All within the “acceptable range” of course. this may help your plant absorb certain nutrients that are only easily accessible on one side or the other of the supposed “acceptable range”

Thanks! This is good. Coco recommendation ranges are 5.6-5-8 in veg and 6.0-6.3 in flower. I’ve been hitting my PH in the upper 6.2. After going over some of my notes and your chart I think I’ve been in an “acceptable” high for too long in PH. Thinking should swing it back down closer to 5.9-6.0 should do the trick then just keep dancing around from 5.9-6.3.

Boogierook · Jul 20, 2021

canna_montana said:
Thanks! This is good. Coco recommendation ranges are 5.6-5-8 in veg and 6.0-6.3 in flower. I’ve been hitting my PH in the upper 6.2. After going over some of my notes and your chart I think I’ve been in an “acceptable” high for too long in PH. Thinking should swing it back down closer to 5.9-6.0 should do the trick then just keep dancing around from 5.9-6.3.

That makes sense to me! I can understand why the recommended flowering ph in coco is on the higher end as it seems that’s where the most phosphorus is available. Hopefully a little controlled ph drift here and there takes care of the issues you are seeing. Don’t think the damaged leaves will get better but if this is the problem then it should stop and not get worse. Good luck!!

turbobuzz · Jul 20, 2021

Ugh, blurple. Would like to see a pic of the whole plant without blurple.

canna_montana · Jul 20, 2021

turbobuzz said:
Ugh, blurple. Would like to see a pic of the whole plant without blurple.

@Boogierook
@SSHZ
@turbobuzz

Boogierook · Jul 20, 2021

canna_montana said:
@Boogierook
@SSHZ
@turbobuzz

They look good!!! I still think it’s most likely a lockout occurring, quite possibly with calcium but could be something else. I gladly offer my help, but always do your own research!

“All cannabis fertilizers come with Calcium (Ca) and Magnesium (Mg). This leads some growers to wonder if Cal Mag supplement is really needed. However, when you are growing in coco you have to be aware that the coco itself requires a certain dose of calcium and magnesium. The cation exchange sites in coco will lock on to the Ca and Mg and render them unavailable to the plant. We must provide larger doses to ensure that there is some Ca and Mg available to the plant”
-https://www.cocoforcannabis.com/needcalmag/

found this to be interesting and it may be helpful!

turbobuzz · Jul 21, 2021

Look good. Looks like you’ve got a long way to go. Lot of weight to pack on still. I’ve never grown in coco, but what’s been discussed sounds logical to me.

jondamon · Jul 21, 2021

canna_montana said:
Here is my set up:
I’m growing in coco. Feeding with the full line of Fox Farm nutes. I keep ppm 1200-1400. And PH before each water at 6.0-6.3. I flushed over the weekend (7/17). And water/fertigate depending if they feel light. I usually end up everyday to every other day.

Is that with 500 or 700 ppm calibration?

At 500 that’s nearly 2.7EC at 700 it’s 2.0EC.

These has been fed daily and lately 3x daily with 0.9EC about 450ppm or 600ppm depending which calibration you’re using

Personally I would say you’re feeding too hard and your input pH is a little too high. I aim between 5.5-6.0 usually sticking to 6.0.

The Florist · Jul 21, 2021

canna_montana said:
I am noticing it fairly evenly all over.

I had the exact same looking "issue" with my girls week 6ish which for me personally i suspect to be a cal def - i added some cal mag to 1 out of 3 as i was suspicious of a lockout and it seems to of not gotten any worse (it's plateaued) where as the other 2 have shown more cal def

curious2garden · Jul 21, 2021

jondamon said:
Is that with 500 or 700 ppm calibration?

At 500 that’s nearly 2.7EC at 700 it’s 2.0EC.

These has been fed daily and lately 3x daily with 0.9EC about 450ppm or 600ppm depending which calibration you’re using

Personally I would say you’re feeding too hard and your input pH is a little too high. I aim between 5.5-6.0 usually sticking to 6.0. View attachment 4948154 View attachment 4948155 View attachment 4948156 View attachment 4948157

I agree that it looks like he's pushed it too hard too. But nothing terrible and nothing it won't recover from, a little nitrogen clawing and some Ca def. If he backs off I'll bet it will all come around fine.

quazyqual · Jul 21, 2021

canna_montana said:
Thanks! This is good. Coco recommendation ranges are 5.6-5-8 in veg and 6.0-6.3 in flower. I’ve been hitting my PH in the upper 6.2. After going over some of my notes and your chart I think I’ve been in an “acceptable” high for too long in PH. Thinking should swing it back down closer to 5.9-6.0 should do the trick then just keep dancing around from 5.9-6.3.

Nah dude just stay at 5.8 or 5.9 the whole time. Trust me.

twentyeight.threefive · Jul 21, 2021

canna_montana said:
Here is my set up:
I’m growing in coco. Feeding with the full line of Fox Farm nutes. I keep ppm 1200-1400. And PH before each water at 6.0-6.3. I flushed over the weekend (7/17). And water/fertigate depending if they feel light. I usually end up everyday to every other day.

What did you "flush" with? Your plants are definitely overfed, especially considering your infrequent fertigation. Pots should never feel light as coco needs to stay moist.

canna_montana · Jul 21, 2021

twentyeight.threefive said:
What did you "flush" with? Your plants are definitely overfed, especially considering your infrequent fertigation. Pots should never feel light as coco needs to stay moist.

I flushed with Fox Farm Sledgehammer. You're right, they should stay moist. I'm not sure where you are getting my "infrequent" fertigation from when I answered that I water every day to every other day. Also from my research, the OG growers all say to cycle your watering from wet to dry to prevent root rot.

WEEK 6 IN FLOWER

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