Unhealthy looking plant?

[Esox Lucius]

Hi people this is my first post and first go at autos im ok with photos just wanted a quick finisher for Christmas.

Problem: unhealthy looking new growth and possible mag def which iv tried treating with cal mag foliar feed.

Medium/grow method: 50 50 coco an biobizz light mix(all i had left). 11 ltr pots watering when pot is light.

Feed: and supplements used:
One half strength feed of biocanna vega nearly two weeks ago.
water source: dechlorinated soft tapwater.

Strain/age: n/l auto around 5 weeks from sprout.

light used: 700w led 2 and a bit feet above plant top.

Climate: 26 - 28 with light on 20+ lights off most of the time, humidity 35-45 and i mist occasionally

Additional info: 1.2x 1.2 tent 5 inch extraction

 

[Rev. Green Genes]

Magnesium or calcium deficiency I think, likely calcium because of twisted new growth. Might want a second opinion! but that close up has yellow midrib and veins. looks like The highest leaves are taco'd a bit, suggesting the light may need raised a smidge. Because of the tips, I thought hot nutes first, but 2 weeks since feed, and N lights can take some heavy nutes.


They look pretty healthy and recoverable, try adding some CalMag+ or a foliar spray.
Are the taco leaves from light stress or other environmental thing, such as a space heater or something? I don't know.

 

[Esox Lucius]

Thanx for replying so fast green genes, i thaught that about lights too but the twisting of new growth is happening all over. Ive definitely got a mag issue and foliar treated last night so ill see how that goes. Also starting bloom nutes which arrived late so fingers crossed that helps. Iv just never had leaves twist over before.

 

[Rev. Green Genes]

It being Sunday you will probly get more answers in a few hours. It's 7 am in eastern US. Waira and Namvet run the infirmary, and they usually beat me to it and always figure it out.

 

[Esox Lucius]

It being Sunday you will probly get more answers in a few hours. It's 7 am in eastern US. Waira and Namvet run the infirmary, and they usually beat me to it and always figure it out.

Thanx bud off out now anyway so ill check in later.

 

[Waira]

EL-- so, only the one feeding so far? If so, I'm kinda shocked things aren't worse! ... 'Bizz lite is very low nute reserves, and coco is basically zero ( bit of K maybe), so you need to start feeding more often, weakly at first, with bloom nutes,... Ca-mg too, since you're in coco which has elevated demands for Ca and to a lesser degree Mg,... (look into coco's CEC properties),... usually, such blends aren't that big of an advantage vs. straight peat based or straight coco, though both are "soilless' mediums,.. coco has several specific do's and don't's,....
the lights-- 700w?? that's an enormous amount fo light power for a small tent,.. what brand.model light is it?
...Hmmm, symptoms kinda non-specific just now,.. twisty tips might be a couple things, color fade on lowers likely a little N defc. starting,.. some of which is normal at this stage,... what did you use for foliar, epsoms?

 

[Esox Lucius]

Thanx for replying W. I hear you about the mix of mediums i was dubious but was all i had at the time i have another younger onein coco and shes fine so far. Gave first bloom nutes 24 hrs ago as i said they arrived l8.
A friend gave me the light cheap brand im afraid. Do you think i should switch back to 600w hps or even use it at 400w?
For mag i used plant magic magne cal +. Would usually use epsoms bit shop had none in.
Thanx again any help is much appreciated.

 

[Waira]

...how far away is that light, and what brand? From what the guru's say, watt's aren't the best measure,... but 700 actual draw watts is insane,....I'd use that 400 instead,.... same questions for this one too,...

 

[Esox Lucius]

Hello Waira the light was 2 and a bit feet above tops but moved it up another 6 inch for now, but im going to switch to hps which is a 600w, i think its a sunmaster. I drop it to 400 with the ballast. I just thaught all that light and less heat from the leds what could go wrong? But maybe its too much for the space. She is at least flowering stronger now and not getting any worse so I'll see how light change goes and update soon.

 

[Waira]

good to hear! Let's see what a few more days shows,....