what do you think this is??

M

MjAeJdIiK

Well-Known Member
I think its magnesium deficiency. Bottom leaves go pale, tips burn up, and there are neurotic spots on leaves. This is a pic of a bottom leaf . I can take pics of the whole plants if it helps. Thanks
IMG_20160311_034225.jpg
 
M

MjAeJdIiK

Well-Known Member
Hey thanks for the quick reply. I just got some cal-mag yesterday but have not added it yet. I wanted to be pretty sure of the problem before I just started giving them more nutes. So you agree, mag deficiency? Also, I believe that my soil PH may be out of wack, causing the plants to be unable to use the mag. I just ordered a pH/ec/TDS meter from e bay. My plants are also a few days away from needing to be watered, I don't want to over water on top of everything else. My medium is a mix of coco coir/cow manure compost/perlite/vermiculite, if that helps. I used to grow a lot of cannabis about 12 years ago. Never had any of these problems, but I always made my pH was good. I kind of jumped into this grow un prepared because ingot some clones gifted to me, and I didn't have all the equpitment I should have. So, what do you think my best plan would be to solve this issue? Again thanks
 
Kswisss

Kswisss

Well-Known Member
Hey that's exactly how I got back into it after all these years, my buddy gifted me some clones. OK so back to what you were saying - sounds like a great mix, ID wait a few days for your pH meter to water again, Cal mag will bring down the pH of the water along with NPK rich nutrients. Can't hurt to feed them a dose of Cal mag though. Just wait for your meter, get a nice fert mix, pH to 6.5 and water away
 
M

MjAeJdIiK

Well-Known Member
Thanks again for the fast reply KSwiss! Ok, so I'm going to take your advise for now and wait for my meter so I can make sure that everything is good going in and coming out.
IF my girls start to show signs of serious mag deficiency before my meter arrives I'll give them a light watering with a dose of cal-mag only. Sound like a good plan?
 
Kswisss

Kswisss

Well-Known Member
Very good. Sounds like you're on the right track. Any other questions give me a holler!


Swiss
 
SamsonsRiddle

SamsonsRiddle

Well-Known Member
MjAeJdIiK said:
Hey thanks for the quick reply. I just got some cal-mag yesterday but have not added it yet. I wanted to be pretty sure of the problem before I just started giving them more nutes. So you agree, mag deficiency? Also, I believe that my soil PH may be out of wack, causing the plants to be unable to use the mag. I just ordered a pH/ec/TDS meter from e bay. My plants are also a few days away from needing to be watered, I don't want to over water on top of everything else. My medium is a mix of coco coir/cow manure compost/perlite/vermiculite, if that helps. I used to grow a lot of cannabis about 12 years ago. Never had any of these problems, but I always made my pH was good. I kind of jumped into this grow un prepared because ingot some clones gifted to me, and I didn't have all the equpitment I should have. So, what do you think my best plan would be to solve this issue? Again thanks
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I wouldn't feed a plant calmag if you already have a complete nutrient regimen. Calmag is like a whole nutrient in itself.

What nutrients are you using? Coco really likes it when you ph everything to 5.8 for veg and 6-6.2 for flower. 6.5 will lock out calcium.
 
M

MjAeJdIiK

Well-Known Member
I'm not using straight coco coir, its a coir/manure/verm/perlite mix, still feed every watering? I'm using general hydroponics coco grow A +B with some fluralicious and a touch of heavy 16 roots.
Does everyone agree that the leaf looks like a mag deficiency?
 
M

MjAeJdIiK

Well-Known Member
SamsonsRiddle said:
hard to tell without a whole plant pic, could be underfed, underwatered, or like you said out of ph range.
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Ok. I'm not at my house right now, I will post pics a little later of the whole plants etc. I don't think I'm over or under watering . thanks a lot for the replys guys.
 
SamsonsRiddle

SamsonsRiddle

Well-Known Member
You should be safe to nute every watering. I honestly have never added vermiculite (always thought it retained enough moisture) or manure (i use synthetics and like being in complete control of what the plant gets) so I don't want to lead you the wrong way. I wouldn't ever give your coco plain water unless you were having signs of salt buildup, but the manure kind of throws a wrench in there for me.

I have grown with coco/perlite before at different ratios and also in a hempy. The plants always liked constant light feedings, i got up to watering 3 times a day but in much smaller containers. Never have i added just water, but i always nuted lightly and kept the medium flushed.
 
M

MjAeJdIiK

Well-Known Member
RM3 said:
1st & 2nd pic = plant eating leaves it no longer needs

3rd pic = nothing to worry about

4th & 5th pic = healthy plant
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Really? Eating leaves it doesn't need? In was under the impression a plant in veg wouldn't do that of healthy, in thought they didn't do that until well into flowering. Huh, learn something new everyday!
 
M

MjAeJdIiK

Well-Known Member
SamsonsRiddle said:
You should be safe to nute every watering. I honestly have never added vermiculite (always thought it retained enough moisture) or manure (i use synthetics and like being in complete control of what the plant gets) so I don't want to lead you the wrong way. I wouldn't ever give your coco plain water unless you were having signs of salt buildup, but the manure kind of throws a wrench in there for me.

I have grown with coco/perlite before at different ratios and also in a hempy. The plants always liked constant light feedings, i got up to watering 3 times a day but in much smaller containers. Never have i added just water, but i always nuted lightly and kept the medium flushed.
Click to expand...
I agree, next time I use coco I'm not going to add anything with any nutes to the mix, and less verm, inthinkni added a little too much because it takes forever for it to dry out. Can't wait for my pH and TDs meters get here ugh. Thanks for the input
 
RM3

RM3

Well-Known Member
MjAeJdIiK said:
Really? Eating leaves it doesn't need? In was under the impression a plant in veg wouldn't do that of healthy, in thought they didn't do that until well into flowering. Huh, learn something new everyday!
Click to expand...
1st pic, notice that the stems on the leaves are reddish/purpleish (color varies with strains) means the leaf is a sink (place where plant stores nutes)

last pic whole plant, notice the yellow leaf can barely be seen all others green & healthy

the leaf it is eating is not getting light and is not needed hence the plant is droppin it

once you watch em do this for 40 + years like I have you'll get it
 
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