Light green leaves in early flowering ,calcium deficency ？

[j1sonbrother]

Day 6 flowering
2.5 Coco hydro,
Gh3 parts , calmag 2.5g／gal, epsom salts 1g/gal
pH 6.0, EC 1.2 ,
Environment：humidity :50%, leaf temperature：23℃
Seems to look like a calcium deficiency？, And haven't tested runoff yet , photos taken after feeding in a few mins.
Appreciate

 

[j1sonbrother]

@Aqua Man ,

 

[Homesteader]

I see some mite bites on your lower leaves in one of the pictures. Probably not what is making you extra lightened up but you probably want to get that before flower gets going.....Personally I would defoliate any of the lowers with spots. bag em and tag em and get em out of your room, then spray with a mite soap of some sort.

 

[Clyde4210]

Looks like nitrogen deficiency.

 

[j1sonbrother]

I see some mite bites on your lower leaves in one of the pictures. Probably not what is making you extra lightened up but you probably want to get that before flower gets going.....Personally I would defoliate any of the lowers with spots. bag em and tag em and get em out of your room, then spray with a mite soap of some sort.

Thank you for your opinion, mate .
it is true that there are some mite bites, but I feel that this is not too big a problem, I have enough airflow and the humidity is maintained at 47-51% , and I started adding potessium silica in mid veg ... Do you think it looks like a not enough calcium ? Or need boost some P .？
I had some magnesium deficiency in Veg before , then I added some epsom salts , the problem seems to be solved, but these spots at the bottom do you think it is caused by calcium?, still 2.5ml/gal of calmag .

 

[j1sonbrother]

Looks like nitrogen deficiency.

Thanks, I sticked with transition feed (4ml of ,micro/gro/bloom) into 4gals ，then added 4×2.5ml calmag, 4g epsom salts which dissolved 1.2ec. to be honest I'm not so sure it's N def.

 

[Homesteader]

Are hydro growers adding this much mag ussually? I don't really know how much hydro folks are adding magnesium but it seems you may be overlapping them and perhaps giving your plants too much which could/can/will lock out other nutrients. An excess of magnesium can hurt your uptake of calcium and potassium....An excess of mag also increases uptake of N and Phos but you dont really need to know that

 

[Homesteader]

Those spots are the mite bits I was referring to. clip em and get rid

 

[j1sonbrother]

Those spots are the mite bits I was referring to. clip em and get rid

Thanks, bro. I will do it now

 

[j1sonbrother]

Are hydro growers adding this much mag ussually? I don't really know how much hydro folks are adding magnesium but it seems you may be overlapping them and perhaps giving your plants too much which could/can/will lock out other nutrients. An excess of magnesium can hurt your uptake of calcium and potassium....An excess of mag also increases uptake of N and Phos but you dont really need to know that

Yeah, I do know an excess of mg can hurt the uptake of cal and p, but this is my first time to try with epsom salts, I added calmag directly before and got great result . In the mean time I did some homework that 1g/gal of epsom salts was a very safe dose, cause I really found that led and coco, compared to hps or hid, need more mg , especially from later veg to the flowering .
To be honest, I'm also a little suspicious that too much magnesium was causing this problem, because I just added 7.5ml of potassium silica, 7.5ml of calmag, 3g of epsom salts in 3 gals , and the ec reached 0.9 (tap water :150ppm ), and I'm just wondering if I cut epsom salts,how much calmag do I need in Coco hydro .Omg, it's been a while since I've played with coco hydro ，do you have a recommended dose? The feedingchart was 2.5ml/gal.
Thanks.

 

[j1sonbrother]

I just took some more pics and feel that the leaves have recovered a little bit.
And did some runoff test, pH 6.0 ec 1.3 in / ph 6.0 ec1.7out, it seems to need some flush with 0.5～0.6ec

 

[jguit]

Not an expert on GH 3-part but it looks like there's a pretty decent amount of mg in it to start with. With the additional CalMag, I'm not sure you need the extra mag sulfate. Were you having a mg issue?

You might want to get your leaf temps up a bit as well.

 

[N1ghtL1ght]

Yellowing on top could also mean the onset of a micro-deficiency, seeing how much kations Ca/Mg you add.
I mean your plants are in veg but you already supp more than others in full bloom...

 

[Aqua Man]

Check ph in the root zone, led require more cal, mag, potassium and sulfur if I remember correctly. It’s due to the spectral difference and photomorphology they create.
If you ask me you got to much light for the demands and I’d start by back it off a lot for 3 days just to confirm the diagnosis. It won’t hurt growth at all and help if anything.

just my 0.02 is yes you have nutrient issues like mag and N deficiency but it’s cause by light. After that can be confirmed then I’d slightly tinker with nutrient ratios

 

[j1sonbrother]

Not an expert on GH 3-part but it looks like there's a pretty decent amount of mg in it to start with. With the additional CalMag, I'm not sure you need the extra mag sulfate. Were you having a mg issue?

You might want to get your leaf temps up a bit as well.

Thanks ,mate
By the 2 week , I will raise the leaf temperature by 24-25 degrees Celsius and learned from DB.

 

[Heywood]

If you ask me you got to much light for the demands and I’d start by back it off a lot for 3 days just to confirm the diagnosis. It won’t hurt growth at all and help if anything.

I agree with this as I just went through a similar issue. I am using a Spider Farmer SE5000 LED and even though I was 24" above the (3 week veg) plants at 50% dim, they started yellowing and drooping.

Raised the light up to 36" and saw they started recovering quickly. It may just be this particular strain (Blueberry Muffin) but they sure are finicky on what they want for light.

Anyway - @Aqua Man - Thanks for the RickRoll. Now I have to go finish watching it. lol. It has 1.1Billion views.

 

[j1sonbrother]

Check ph in the root zone, led require more cal, mag, potassium and sulfur if I remember correctly. It’s due to the spectral difference and photomorphology they create.
If you ask me you got to much light for the demands and I’d start by back it off a lot for 3 days just to confirm the diagnosis. It won’t hurt growth at all and help if anything.

just my 0.02 is yes you have nutrient issues like mag and N deficiency but it’s cause by light. After that can be confirmed then I’d slightly tinker with nutrient ratios

Appreciate, Aqua, It's interesting that plants are feel better today, the same as when I turned on the light yesterday, but the leaves still feel very light and thin, to be honest, I added 4ml/calmag in the first run, no problem at that time, but in this run with 2.5ml calmag and 1g epsom salt, always feel some problems, ph in: 6.0/out 6.0.
I really don't know if it's a calmag problem, because the micro already has 5% cal in it, I will check the light tonight.

 

[j1sonbrother]

Is there something wrong with the way I dissolve the nutrient solution？, or should I add gh 3 parts /calmag/epsom salt to a gall of water and then slowly dissolve it?
I'm hoping to get some advice, thanks.

 

[Aqua Man]

Drop ph to 5.6

 

[Madmax]

I that so they can take more cal @Aqua Man..uno it really blows me out that i ph around 5.9 then when i look at hydro charts cal isnt available at that ph .canna must have enough right through the grow.tank is 10ppm .