leaves dying, please help, lots of details included

hello guys and girls, its been a while since i have been on, with moving house and all that, well a few weeks ago i got me grow up and going again, ran into a few problems with two of the plants, i have three all together, this problem has been going on for a good few weeks now, i will list all conditions and post pics, hope yous can help

strain - barneys farm lsd from seed
run off ph - 6.56 and 6.57 for the other, the water i put through the plants was 7.06
light - 400w mh in a cooltube
soil - canna terra plus
pot size - 11 litres
nutrients - bio bizz
grow room size - 3 feet x 4 feet
temps - about 70 lights on and 60 lights off
humidity - about 50 lights on and 60 lights off
age - 6 weeks and one day from planting in soil

these plants where planted straight into the 11 lite pots with the canna terra soil, i have gave them nutes only the once, the time i fead them they all got 1 litre of water, 1 litre of water with a small drop of bio bizz grow (probs about 2 ml) and another 1 litre of water with small drop of bio grow, small drop fish mix and small drop of alg a mic (these would have made up about 4 ml)

the plants where yellowing before i fed them, the plant that is doing ok stopped yellowing after i fed it, and it is the smallest plant out of the three (always has been) the two plants in question i would say are getting alot worse since they where fed, it has been 8 days since i fed them

so what do you guys think the problem is and what should i do now?





this is the plant that is ok, just a bit smaller

Check out this list of deficiencies https://www.rollitup.org/marijuana-plant-problems/414392-common-deficiency-list-cures.html it should help you out.

I have the same exact problem. bump for a cure

yeah i have looked through lots of things like that, even the three books i have, just can seem to pin point what it is

anyone else ever had anything like this before?

what kind of water are you using?

You have a Magnesium problem. I would add 1 tbsp Epsom salt with 1 tsp Molasses for your cal-mag and use it with your nutes

are you using distilled water or regular tap water?

Aside from the deficiencies,...did you happen to let them dry excessively, to the point of becoming droopy/wilted? I've seen results similar to your's, after severe underwatering. Also, I'm not real familiar with the less common diseases, but it also could be some kind of disease or fungus problem. Might be worth looking into, if you can't pinpoint the problem.

VICTORYGARDENSHYDRO said:

what kind of water are you using?

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i just use tap water, i let it sit in an open container for at least 48 hours

jawbrodt said:

Aside from the deficiencies,...did you happen to let them dry excessively, to the point of becoming droopy/wilted? I've seen results similar to your's, after severe underwatering. Also, I'm not real familiar with the less common diseases, but it also could be some kind of disease or fungus problem. Might be worth looking into, if you can't pinpoint the problem.

Click to expand...

i have never let them dry out to much, i thought it was maybe an overwatering problem from starting with the big pots but i dont think it is that anymore

there is a load of roots coming out every hole in the bottom of the plant, could this sort of stuff happen from being root bound?

REALSTYLES said:

You have a Magnesium problem. I would add 1 tbsp Epsom salt with 1 tsp Molasses for your cal-mag and use it with your nutes

Click to expand...

This was my first thought too. But Mag deficiencies look like Mag burns to me. I didnt see any CalMag or epsom so im assuming Mag deficiency.

hey thanks for the replys, so if this is a mg deficiencie what else could i use, i cant get hold of any epsom salts at this present time, probs not for a week or two, i have some bio bizz alg a mic, do you think that would be ok? its says it has some mg in it

thanks

Go to your local drug store it's only $2-$3 or go to the 99 cent store

got some epsom salt, got it online, i used it two days ago, so i will must have to wait, i have even bought the book called marijuana garden saver, really good book, looking through the book im still unsure of what i think it is, i hope the epsom salt helps, thanks for your help guys, i will report back in a few days to let you know the outcome and give the reps if deserved

thanks guys

well this problem is sorted now, plus rep to all who said mag def cause i got some epsom salt and the problem is now cured

thanks all

I think your right. Rootbound! I think bigger pots would help big time. I just noticed the size of the plant in comparison to the pot there in. I'd start there, first use some fresh soil around the rootmass that your gonna pull up. Nice and fluffy soil and just give it water ph'ed of course and just let it get comfy and stretch out.

I think you need to replant into at least 3 gallon pot, i would go 5 gallon. Make sure you PH water is aroun 6.5 to 6.8. Here is a chart to see whats going on with your lock out.
Remember plants dont like to be saturated all the time. Roots like oxygen and lockout nutes when they dont get it.
let them dry out for an extra day and be cautious of your watering and ph.
you can foliar feed with epson salt for faster results too.
this chart helps me.

hey guys, these plants are fine now, i did repot them not sure what size pots in litres, all i know is they are 400m diamater i also gave them epsom salt as stated, the pots they are in in the pictures are 11 litres

thanks for the input anyway