Plant issue, boron defiency?

[Guest]

so these plants are just under 2 months old. One of them is showing alot of yellowing on the top pH is 6.3-6.4 on all. The back right one is the one furthest along, others show some sign of going down the same path, but I dont know for sure. I took 2 clones off the plant thats the worst about a week ago. Is this a defiency, or possibly light bleaching? i have a 1000 watt above, but its a good 2 or more feet away.

temps vary from 72-75. the 2 clones on the bottom left are from the affected plant. I took those before the other 3 in the picture. what happened to them? Im having trouble cloning, never done it before. Everyone says its simple, etc just follow these steps. but I miss be missing out on something because roots never appear.

 

[Guest]

forgot to add, these have been on 24/0 light schedule since sprout. maybe i should give them some dark time now.You can see the back left one has one fan leaf blade affected by it as well. Im pretty stumped at what it is unless its boron def or light issues?

More pictures:

 

[420guy]

it definately isn't light bleaching for sure...it looks like the early signs of phosphorous deficiency to me...as for clones yellowing some of their leaves, that's completely normal...have ya given your plants a good flushing ever...might try that...stay safe

 

[Blackvelvet]

Velvet's suggestions

Velvet's suggestions

Run the 1000 watt 18/6 not 24/0

I agree with being a micronutrient disorder. I don't think boron but maybe copper def. This is just a guess. Ph being 6.3/6.4 may be too high and reducing the uptake of the micros.

I did not see a humidity dome over the clones. They need 100% humidity while rooting to prevent water loss while rooting. You may also want to spray the dome with water and the clones especially if they begin wilting. Once roots form, slowly begin removing the dome over several days. Restore the dome if they wilt. A rooting hormone is a must for uniform rooting and increased roots.

Provide how the plants are being grown and the type/rate of ferts being used.

 

[Guest]

Thanks for the input, I wil switch the 1000 to 18/6. The clones do have a humidity dome on them, I just took it off for a picture.

I just fed them yesterday, the plants. should I flush them now, or wait till next watering like tommorow or so?

 

[Guest]

So its still getting worse, i flushed the plants last night. How should I fix this? is it a copper, or phosphorus defiency? or both?

 

[MTF-Sandman]

I'm leaning towards the PH being too high as well...you oughta be running in the 5.6-5.9 range with RW IMO. How much PH up/down are you having to use to keep it at that range? What's the water source and the PPM/EC and PH before adding nutes? Using tap water can lead to lockouts from excessive calcium or iron if the nutes aren't formulated for it...what nutes are you using and how much?

Is that an ebb/flow or hand water setup? E/F can have issues with RW building up nutrient salts near the tops of the cubes, so that may play some part in the whole problem.

True micronute defs are very rare in most cases...usually it's a PH issue or lockout from an excess of something else.

Re your clones: Your temps or humidity are too high. Those ones with the slimy newer growth are 95% goners no matter what you do, so go ahead and pitch them. This is the reason I stopped using domes. Went to a bubble cloner and couldn't be happier. No domes and no dealing with misting them and all that bullshit. Just pop em in and come back in a couple weeks to rooted clones.

Not sure what lighting your using for the clones, but they don't need much. I use a standard T12 shoplight 1' away for up to 100 clones. If you give them too much light, they'll basically eat themselves alive trying to photosynthesize all that energy instead of putting that energy into root production.

 

[Blackvelvet]

It is not a phosphorus problem. This would appear on old leaves not the top portion of the plant. If you examine the leaves above you will notice that the interior portion is yellowing but interestingly the edges and tips remain green. This is a good sign of copper def. You never stated your ferts and how much your using. Try applying your ferts with a lower ph like 5.8 You would adjust the ph to this after all the ferts have been added to the water. Micronutrients become more available as the ph drops.

Good post Mtf Sandman

 

[Guest]

Hi, thanks for more input. Im watering them by hand, they are in soil grow bags. Per gallon I put 5ml cal/mag plus (each feeding). 1ml Bcuzz Growth. 5ml Fox Farm grow big. I have been feeding them once a week. my tap water is about 7.8 ph, after adding the nutes it lowers it to around 6.4 so I never really added any ph down.

Now I realize my mistake last time I had a pH issue of it being too low, I corrected the water before adding the nutes (which was about a month ago). Thanks again, I will lower the pH.

 

[Blackvelvet]

I think your underfeeding. Try increasing the grow big to 7.5ml instead of 5ml. Its 6-4-4 right? Also reduce cal mag plus to 3.75 ml instead of 5 ml. (1 teaspoon = 5ml)
This would give you a ratio of potassium to calcium to magnesium of 4:2:1 So if you got 62 k then you want 31 cal and 15 mag. You don't have to be perfect. Heres the numbers...
n 133
p 32
k 62
mg 12 + a little from the growbig
ca 32

CLF = Constant liquid feed ; you should feed with every watering. Make sure you get runoff from the bottom on the media.

Really the only fault of this is how low your potassium is using grow big. Nitrogen and potassium should be about equal.

I am not a fan of grow big. I think you would get better results using pure blend pro with the cal mag plus. Or, switch to gh 3 part or floranova.

 

[MTF-Sandman]

Oh, I assumed from the RW and tray this was a hydro setup. Definitely bump your nutes then...I'm running 8ml/gal GB, 2ml CalMag, 5ml LK for my moms (in coco) and they're only about 12" tall bushes, but that's pretty close to BV's ratio. Depending on the "soil", you may not need to add the cal-mag at all.

 

[Guest]

Sounds good, thanks again for the help. Ill follow up with an update in a few days.

 

[20kw dreams]

Copper def is super rare, hardly possible

Looks like a lockout or ph probs to me. Stop with the Cal-mag. I've had lots of problems with using that crap, and I'm using RO water and coco. You are in soil with tap, you should NOT be using that crap. I don't think your underferting either. I think there is something else going on. Your definately NOT getting any kind of micro nute deficiency if your using fox farm soil.

What kind of soil are you using? Honestly, I would say something else is wrong. I would say your soil mix was too strong, or your ph is off, or you are getting a fucked up lockout from the Cal-mag.

This is what you do: Saturate the soil with water, let drain and sit for an hour. pour another 1/4 through your pots, this time catch the runoff. Use this to check the PH and EC of your soil. This will let you know what's going on inside the soil.

And if you could answer a few Q's
What's your humidity?
Where are you taking your temps?
How tall are those plants?

Yeah, I think it's the cal-mag or ph

 

[Guest]

Well. I have never used calmag except for this grow, I thought it worked fine. Not sure if its the cause of the problem. They were doing great a week ago, I only fed them once since that time and they started doing that. See below for picture of them a week ago.

temp 71 degrees
51% humidity
plants are about 2 feet or so tall.



1 week ago (not current)