White Widow doing unusual things

[BeatleB77]

Hi all, I’m 4 weeks into flower of white widow

and the leaves on the main have started reaching up for the light, I’m growing in coco for the first time and using cyco nutrients. The light is 4x55w t5 in a 80x80x160 tent with fan in, fan out and oscillating fan through the plant. Is this a normal thing for a plant to do, it’s never happened before and worried there some sort of deficiency - light I’m thinking.

 

[Rexer]

Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.

There is both positive and negative phototropism. In this case, I believe it is positive and your plants is showing happiness.

 

[BeatleB77]

Thanks Rexer, appreciate your time

 

[BeatleB77]

Thanks Rexer, appreciate your time

Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs.

There is both positive and negative phototropism. In this case, I believe it is positive and your plants is showing happiness.

Hi Rexer
So... turned out not so healthy, within 24 hours it had turned into a dried shrivelled twig, nute lockout was my first thought so flushed with plain water over 4 days and trimmed back some of the damaged foliage and it seems to be coming back, I’ve searched everywhere for a pic of something similar and could only find a similar pic with zinc deficiency. This pic was today and I’ve never seen anything like it

 

[Rexer]

@BeatleB77

Both my jaw, and heart dropped when I read your post.

To look at your first picture, on my phone (which admittedly is old) i see what looks like "praying". I'm not even going any further, I'll call in some of the pros so I don't screw anything else up.
@Pennywise @Mr. Sauga
I can't even express my remorse on being wrong

 

[BeatleB77]

@BeatleB77

Both my jaw, and heart dropped when I read your post.

To look at your first picture, on my phone (which admittedly is old) i see what looks like "praying". I'm not even going any further, I'll call in some of the pros so I don't screw anything else up.

I can't even express my remorse on being wrong

@Mr. Sauga, @West Hippie @013 @Pennywise

In no way I hold you responsible! I’m pretty devastated. It’s grown beautifully for 12 weeks and then this all started a day after fresh nutrients so I figure I fudged something up but I learn something new with each grow, hopefully I can salvage something

 

[Rexer]

In no way I hold you responsible! I’m pretty devastated. It’s grown beautifully for 12 weeks and then this all started a day after fresh nutrients so I figure I fudged something up but I learn something new with each grow, hopefully I can salvage something

You're a great person, but if I gave bad advice then it's on me. Wish you were near, I'd compensate with some way ...are you near? I'm in Canada (ont)

 

[Rexer]

@InTheShed would you be able to help by any chance?

 

[InTheShed]

At the top I was thinking the light was too close, but seeing the second pic where it crisps overnight eliminates that.

It's tough to say without knowing what medium you're in, what nutes you're feeding it and how much.

The fact that it's coming back is great sign as I've seen plants die overnight for no reason that anyone can figure out.

 

[BeatleB77]

Appreciate that, coco perlite mix and using all the cyco nutrients and using their calculator. I thought the light also and have moved it up to about a foot above, it was about 6inches. Medium ph is at 6.8 now, I couldn’t say what it was when it happened but I’ll do 1 more fresh water flush then slowly start feeding nutrients again. The undergrowth looks good, still green and fresh it’s just the top half of the plant. Weird

 

[InTheShed]

Are you pH'ing your nutes in the high 5s?

No reason to slurry test coco as it's hydro. It also makes flushing easier.

After you after you flush the coco you need to feed it immediately because coco doesn't retain nutrients. I'd go back to at least 50% of their flower schedule if not higher.

 

[BeatleB77]

Yes nutes are ph’d to 5.5-5.8, appreciate the advice, I guess I’ll go give her a little drink now. I’ll post an update in a couple days. Thanks legends

 

[InTheShed]

I look forward to the update. BeatleB!

Also, don't let coco get very dry (in case you didn't know).

 

[Pennywise]

Looks like nutrient burn, coco needs watered at least daily with reduced nutrients run your ph closer to 6.2 in flower.

 

[MrSauga]

Appreciate that, coco perlite mix and using all the cyco nutrients and using their calculator. I thought the light also and have moved it up to about a foot above, it was about 6inches. Medium ph is at 6.8 now, I couldn’t say what it was when it happened but I’ll do 1 more fresh water flush then slowly start feeding nutrients again. The undergrowth looks good, still green and fresh it’s just the top half of the plant. Weird

Are you testing the runoff to get 6.8? Where did that number come from? As Shed said you don't need to do a slurry test, but measuring the runoff gives you a good idea in coco what the substrate is like. It looks/sounds like a pH issue to me.

 

[Carcass]

I’ve searched everywhere for a pic of something similar

I’ve never seen anything like it

Here's one that's pretty close- This is my Northern Lights from last year, suffering from a Potassium/Phosphorous overdose- It was doing fine till I decided to "help her out" with full strength
Bud Explosion (0-19-39)
The overdose showed up the day after the application..I did give it a root rinse, which helped a little, but the damage was already done...the good news is that (other than killing off most of the sugar leaves) the buds weren't damaged...but boy,was it ugly!
Did you apply any bud boosters shortly before she toasted on you?

 

[InTheShed]

Are you testing the runoff to get 6.8? Where did that number come from? As Shed said you don't need to do a slurry test, but measuring the runoff gives you a good idea in coco what the substrate is like. It looks/sounds like a pH issue to me.

I have always held that runoff pH is not a thing regardless of the medium. And as coco is hydro, the pH of the nutes gets adjusted before going in. That's the number that matters to the roots.

Have I got that all wrong?

 

[Pennywise]

I haven’t checked coco runoff for maybe 3 years now. It’s a totally useless number. Maintaining proper water content is very important. As moisture levels drop quickly with coco do to the plant drinking and evaporation with fabric. Nutrient levels tend to climb. Once you water again to runoff the coco resets itself. Commercial growers advice not to drop below 30% moisture to prevent EC spikes and lockout.

 

[BeatleB77]

Are you testing the runoff to get 6.8? Where did that number come from? As Shed said you don't need to do a slurry test, but measuring the runoff gives you a good idea in coco what the substrate is like. It looks/sounds like a pH issue to me.

I went and bought a ph probe soil tester thing, I don’t know how reliable they are.

 

[InTheShed]

Unreliable. And testing the pH of coco isn't necessary as it's hydro. Check the pH of your nutes and water to runoff, and as Penny said, don't let it get below a 30% moisture level.