rust spots and yellowing of leaves

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jdr00

Active Member
Hi, everyone, I have a question about my plant. This is Granddaddy purple auto flower plant. Its 70 days old. It is planted in fox farm ocean forest potting soil. with 25% perlite. I feed it fox farm big grow at 1/2 tsp per gallon , FF Tiger bloom @ 3/4 tsp per gal. and 1 tsp Big bloom per gal. I know this is light feeding . But I'm trying not to overfertilize . It seems like its taking a lot longer to grow then other auto flowers I've grown. But the real problem is the very bottom leaves are turning yellow( yellow veins ) and the upper leaves have little rusty looking spots. I cannot figure out what this is and i have done a lot of reading. Can someone please help?

Thanks, If I'm missing anything let me know.
 

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U

Username85

Well-Known Member
Have you checked the ph after adding the nutes? I’m using Tiger Bloom only, 1 tsp per gal, and I have to add a bunch of PH Up to not make it acidic as hell.
Those spots could be caused from a ph swing
 
CaliRootz88

CaliRootz88

Well-Known Member
I haven't ran autos but, I thought most autos run around 11Weeks (77 Days)?
Week 1-4 Seedling-Late Veg
Week5-11 PreFlower-Harvest

If what I'm thinking is true and you're on Week 10? Your buds appear to me to be stunted. In combination with your leaves I'd bet you have had ph issues at the soil level for awhile. Maybe even nute/environment issues to. And missing more info makes guessing/helping harder.

What size pots are you in? Did you ever transplant? Are you feeding everytime you water? How often do you water? Do you allow run off? How many days between your waterings? These questions may not be much help with your current grow but may shed light on future runs.

What light are you using?
Any issues with pests?
 
U

Username85

Well-Known Member
jdr00 said:
What is the exact ph of your nutes? I'm curious
Click to expand...
I don’t know the exact ph, I use a drip test, but from experience it takes me .5ml ph down to bring my tap water to 6.5-7.0 range and when feeding with Tiger Bloom it takes 1.5ml Ph Up per tsp TB to get back in range
 
J

jdr00

Active Member
CaliRootz88 said:
I haven't ran autos but, I thought most autos run around 11Weeks (77 Days)?
Week 1-4 Seedling-Late Veg
Week5-11 PreFlower-Harvest

If what I'm thinking is true and you're on Week 10? Your buds appear to me to be stunted. In combination with your leaves I'd bet you have had ph issues at the soil level for awhile. Maybe even nute/environment issues to. And missing more info makes guessing/helping harder.

What size pots are you in? Did you ever transplant? Are you feeding everytime you water? How often do you water? Do you allow run off? How many days between your waterings? These questions may not be much help with your current grow but may shed light on future runs.

What light are you using?
Any issues with pests?
Click to expand...
GDP strain 10-14 weeks (ILGM web site)
I'm using 3 gallon air pot
I planted it in a big pot right after germination . So no transplant
Feeding every other watering
I water when almost completely dry and the pot is light. I also have a moisture meter that i use.
I water about about every 3-4 days
using mars hydro ts600
No pests
 
J

jdr00

Active Member
My last grow was better than this one. I just can't figure out what I did wrong? The only thing that is different is went through another breeder and different strain. It's supposed to be a better breeder (ILGM) First one was growers' choice
 
HydroKid239

HydroKid239

Well-Known Member
jdr00 said:
Should i be checking the ph by runoff, Ph of actual soil or ph of water/nutes?
Click to expand...
Never mind run off. It’s confusing.
it looks like classic calcium deficiency. Botonicare calmag 5ml to the gallon would help this, but the damage is done to that leaf. Get the calmag in there &pluck that leaf. Keep an eye on the bigger/older leaves. That’s where this would show up again if not taken care of.
 
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