Leaves yellowing, some spotting. Nutrient deficiency or?

ncalgrower · Jul 30, 2020

This is my second year growing outdoors in fabric pots. I started "on time" this year and these plants are already 4-5 times bigger than what I grew last year! But, many of my plants are exhibiting the same problem:
- Lower 1/3rd of leaves yellowing, but new growth around it still green
- Some yellow spots on some (not all) leaves higher up the plant

The only differences between this year and last are:
- I haven't been lowering the ph of my tap water. Runoff has always been around 6.5.
- The plants are way bigger so I'm sure they much hungrier

My eyes hurt from reading every post and marijuana site about issues. If I had to guess I'd say this looks like Nitrogen deficiency, but I really need some expert input. Please help this noob out and save my girls! TIA

LittleDabbie · Jul 30, 2020

You got at least 1 or 2 nutrient deficiency's.. the most prominent is magnesium ( I love sayin that word this month ) It just rollllllllllls off the tongue.

And maybe zinc but its hard to say because some of the def is pretty advanced.

epsom salts at the very least. a broad range of nutrients tho i would suggest.

Kidbuu · Jul 30, 2020

The lower leaves yellowing and getting dry starting from the tip looks just like magnesium deficiency. But I'd keep an eye out for nitrogen.
By the way what is this:

ncalgrower · Jul 30, 2020

It's bird shit

Kidbuu said:
The lower leaves yellowing and getting dry starting from the tip looks just like magnesium deficiency. But I'd keep an eye out for nitrogen.
By the way what is this:
View attachment 1008352

LittleDabbie · Jul 30, 2020

ncalgrower said:
It's bird shit

I was gonna guess that too!! pooop!

ncalgrower · Jul 30, 2020

Should I start with an epsom spray and then start adding some when watering? Mix some in the top of the soil?

LittleDabbie said:
You got at least 1 or 2 nutrient deficiency's.. the most prominent is magnesium ( I love sayin that word this month ) It just rollllllllllls off the tongue.

And maybe zinc but its hard to say because some of the def is pretty advanced.

epsom salts at the very least. a broad range of nutrients tho i would suggest.

LittleDabbie · Jul 30, 2020

I would foliar spray till your next watering then add it in to the feeding routine. You can keep spraying for a cpl days after feeding tho since it takes a day or 2 for the roots to uptake vs the spray which works pretty much instant.

Beachwalker · Jul 30, 2020

ncalgrower said:
This is my second year growing outdoors in fabric pots. I started "on time" this year and these plants are already 4-5 times bigger than what I grew last year! But, many of my plants are exhibiting the same problem:
- Lower 1/3rd of leaves yellowing, but new growth around it still green
- Some yellow spots on some (not all) leaves higher up the plant

The only differences between this year and last are:
- I haven't been lowering the ph of my tap water. Runoff has always been around 6.5.
- The plants are way bigger so I'm sure they much hungrier

My eyes hurt from reading every post and marijuana site about issues. If I had to guess I'd say this looks like Nitrogen deficiency, but I really need some expert input. Please help this noob out and save my girls! TIA

View attachment 1008298 View attachment 1008299

You didn't mention what you're feeding it?

LittleDabbie · Jul 30, 2020

Beachwalker said:
You didn't mention what you're feeding it?

Not magnesium thats for sure :P

ncalgrower · Jul 30, 2020

This is totally new to me. I mixed my own dirt this year and actually just started with an organic fertilizer which is 1-1.5-2. Honestly, I'm behind the curve on my reading/research right now. I grew out seeds and clones this year and they've all done way better than expected. Last year I started very late, my plants on grew about 2 feet tall before entering flower and this year I have a yard full of plants that are 4-5 tall! I honestly wasn't prepared for this and am scrambling to make sure I keep them happy til harvest. Live and learn :)

Beachwalker said:
You didn't mention what you're feeding it?

ncalgrower · Aug 11, 2020

Just a little follow up. I did the foliar spray, I mixed up some Cal Mag and watered. It seemed to have stopped the spots and yellow moving up the plants, except for two of them, both in 10 gallon fabric pots. I continued a foliar spray and cal mag in the watering. Last watering I added 10-10-10 organic nutrients. BUT, I transplanted another plant from the 7 gallon to a 10 gallon and discovered the bottom 3/4 of the bag was bone dry! So I started running my hand along the inside of a few of the other bags and found the same thing. Clearly I have NOT been watering my ladies enough! Argh. More lessons learned. Watered today and made sure I had good runoff. I also found out my runoff PH was around 7 for almost all the plants. Basically they've been starving on all fronts. I'm surprised they look as good as they do. I haven't grown in 10 gallon bags before and from some searching, I've found similar problems with other newbs moving up to the 10 gallon size.

Leaves yellowing, some spotting. Nutrient deficiency or?

Leaves yellowing, some spotting. Nutrient deficiency or?

ncalgrower

LittleDabbie

Kidbuu

ncalgrower

LittleDabbie

ncalgrower

LittleDabbie

Beachwalker

LittleDabbie

ncalgrower

ncalgrower

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