what is this deficiency ? help))

This happen to older leaves new leaves are healthy .



this problem shows at older leaves , I suspect something mobile as it's happen to older leaves and new leaves look just fine ( I just think) but don't know which is ? it this look like P deficiency ? or mg ? zinc ?
Mobile nutrients are nitrogen in the form of nitrate, phosphorus (P) in the form of phosphate, potassium (K), magnesium (Mg), chlorine (Cl), zinc (Zn)

What Strain is it? Critical kush
Is it Indica, Sativa or Hybrid? I think it is indica What percentages? ???
How Many Plants? 1
Is it in Vegetative or Flowering Stage? vegetative
If in Vegetative Stage... How Long? 25 days since sprout
If in Flowering Stage... How Long? -----
Indoor or Outdoor? indoor
Soil or Hydro? soilless 100 % coco coir
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix? 100% coco
If Soil... What Size Pot? 1 gallon pot
Size (Wattage) of Light? How Many? 65 watt cfl
Is it Air Cooled? yes
Temperature of Room/Cabinet? btween 20 and 25
RH of Room/Cabinet? 40 to 50 percent
PH of Medium or Reservoir? watering with ph of 4.5 - 5.0 - 5.5 - 5.8
Any Pests? no
How Often are you Watering? every 3 days
Type and Strength of Fertilizers used?
hesi grow > 1.3 ml per gallon
hesi bloom > 1.3 ml per gallon
general hydroponics bioweed > 1.3 ml per gallon
cal mag 2.5 ml per gallon
Size or Square Footage of Room? cabin
et grow

Just watered 2 last watering with ph of 5.0 and 4.5 . because I thought it's P deficiency as P uptake better at lower Ph , after feeding 4.5 ph I read my run off at 6.4

just watered Now with 5.1 ph , I read run off 6.2

baxbax said:

just watered Now with 5.1 ph , I read run off 6.2

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Hey mate
Thats a big problem there man. Its a huge swing. Get that runoff down. Dont feed it with a ph any less than 5.5 either. Its asking for trouble. Ph it properly so you know how many nutes are coming out, and accuracy of how much higher lower in ph you have in your media.
I was gonna say it looked deficient on calcium and mag. But judging by you ph, you have a lockout.
Id get a ec/ppm metre aswell.
Good luck
Tim

Tim1987 said:

Hey mate
Thats a big problem there man. Its a huge swing. Get that runoff down. Dont feed it with a ph any less than 5.5 either. Its asking for trouble. Ph it properly so you know how many nutes are coming out, and accuracy of how much higher lower in ph you have in your media.
I was gonna say it looked deficient on calcium and mag. But judging by you ph, you have a lockout.
Id get a ec/ppm metre aswell.
Good luck
Tim

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no matter how much I flush media with 5.5 ph , next day it's high like + 6.5 , I fixed it 3 times to 5.8 with flushing media and next day it raise + 6.5 , do you think I have cal deficiency ? Is calcium mobile ? because this older leaves was fine , as new leaves start grow lower leaves became rust spotted .

If my ph Is high why should I have calcium deficiency ? calcium uptake good at higher ph ? do you think it's P def because of high ph ? as P absorb best at lower ph

baxbax said:

no matter how much I flush media with 5.5 ph , next day it's high like + 6.5 , I fixed it 3 times to 5.8 with flushing media and next day it raise + 6.5 , do you think I have cal deficiency ? Is calcium mobile ? because this older leaves was fine , as new leaves start grow lower leaves became rust spotted .

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Your ph is too high.
Your mediums too sweet. Stop the calmag. Cacium is a sweetener.
You may have hard water. Calcium aswell
Check your ec/ppm. Thats probably high aswell.
Dont give it anymore nutes, until youve given it a good flush, and the ph is staying down. Aim for ph 5.8
Tim

Tim1987 said:

Your ph is too high.
Your mediums too sweet. Stop the calmag. Cacium is a sweetener.
You may have hard water. Calcium aswell
Check your ec/ppm. Thats probably high aswell.
Dont give it anymore nutes, until youve given it a good flush, and the ph is staying down. Aim for ph 5.8
Tim

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in the past days I flushed my 1 gallon pot with 20 gallon 5.5 water to achieve a good flush . fixed ph to 5.7 but the nest day it raised again to + 6.5

my run off ph is truly a nightmare

baxbax said:

my run off ph is truly a nightmare

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Then i think you need to test your water right away!
If you dont have an ec metre on hand, get some distilled water from the supermarket. It'll help catch a few extra salts too.
You need to urgenly find whats going on with your water. If its over 200ppm or so, id be pretty concerned.

Tim1987 said:

Then i think you need to test your water right away!
If you dont have an ec metre on hand, get some distilled water from the supermarket. It'll help catch a few extra salts too.
You need to urgenly find whats going on with your water. If its over 200ppm or so, id be pretty concerned.

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I'm using ro water it's sweet as candy

Run some half strength nutes to 10 - 20% runoff and leave it alone. Stop worrying about the runoff. I never check the runoff. Worry about what's going in. 20 gallons of water for a 1 gallon pot is overkill. 5.5 PH is too low. PH to 6.0. You are doing more harm than good by flushing with 20 gallons of 5.5 PH water.

baxbax said:

I'm using ro water it's sweet as candy

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I think you'll find it is

xtsho said:

Run some half strength nutes to 10 - 20% runoff and leave it alone. Stop worrying about the runoff. I never check the runoff. Worry about what's going in. 20 gallons of water for a 1 gallon pot is overkill. 5.5 PH is too low. PH to 6.0. You are doing more harm than good by flushing with 20 gallons of 5.5 PH water.

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thank you , I have no way except leaving it alone , but something knocking my brain it is mobile Phosphorous deficiency due to my high ph and it is moving from older leaves to feed new grow , and no immobile calcium deficiency how immobile nutrient like calcium can move from older leaves , this rust spots happen to older leaves there's 2 option : 1) mobile deficiency 2) something poisoning my plant . please correct me if i'm wrong

this is picture of phosphorous deficiency from http://www.growweedeasy.com/phosphorus-deficiency-cannabis

baxbax said:

thank you , I have no way except leaving it alone , but something knocking my brain it is mobile Phosphorous deficiency due to my high ph and it is moving from older leaves to feed new grow , and no immobile calcium deficiency how immobile nutrient like calcium can move from older leaves , this rust spots happen to older leaves there's 2 option : 1) mobile deficiency 2) something poisoning my plant . please correct me if i'm wrong

this is picture of phosphorous deficiency from http://www.growweedeasy.com/phosphorus-deficiency-cannabis

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Im putting money on calcium toxicity mate.
Calcium deficiency is brown spotting. Lockouts will quite often look the same. Which would explain the sweet water.
Stop giving it anything less than 5.5 - 5.8 ph aswell.
Good luck

today watered 1.3 ml hesi grow bloom and 1 ml seaweed extract and 2 ml of calcium magnesium for 1 gallon of ro water - Ph in 5.9 - ph out (run off ) > 6.2

still spreading cal mag deficiency

Check your ec/ppm of your media!
RIGHT NOW!!!!!!
You're guessing!
PH? Adjust
Ec/ppm? Adjust
Good luck.
Tim

except my unknown ppm ,is my ph is adjusted ? It's just 0.3 swing on ph ? Is there any way check ppm without ec pen ?
but I can tell I flushed media too much and my calcium def happen after flushing media too much without good amount of calcium , I did it because I had Iron deficiency . before that never seen a cal def this is picture of plant at day 15 I was feeding with ph of 6.1 at this age , but after having iron def I lowered ph Iron def solved but calcium def started

No.
You need one!
Or you're guessing just like i am!
Stop flushing today.
Buy an ec/ppm tomorrow! Then check it all again.
Good luck mate.
Tim

plant at day 15 : ph in 6 - 6.1 ph out : 6.8 - 6.9

a bit chlorosis at lower leaves day 15 :


Increased calcium magnesium up to 5 ml per gallon to solve this little cholorosis , by doing this I blocked Iron uptake and Iron deficiency happened :


then I lowered ph to 5 and 5.5 and flushed too much , iron deficiency solved and calcium deficiency happened .

today picture of plant :

baxbax said:

plant at day 15 : ph in 6 - 6.1 ph out : 6.8 - 6.9

a bit chlorosis at lower leaves day 15 :

Increased calcium magnesium up to 5 ml per gallon to solve this little cholorosis , by doing this I blocked Iron uptake and Iron deficiency happened :

then I lowered ph to 5 and 5.5 and flushed too much , iron deficiency solved and calcium deficiency happened .

today picture of plant :

Click to expand...

Do as i said dude!
Get a damn metre! Tomorrow!
You're guessing!!!
And freaking out! Stay calm.
PH. Adjust.
Ec/ppm. Adjust
Have a look at cal and mag on a chart, comparing nutrient availability and ph. You'll see what i mean. You dont know if its cal or mag. Or whether its lockout. Or deficiency. Until you can check your ec/ppm vs ph. Then go from there.
Get a metre ASAP
Good luck
Tim