Cant figure out this deficiency

these dark spots started showing up and the leaves are turning yellow and dying. Any idea what it might be either cal mag, salt lockout, magnesium, manganese im just all over the place


Temps 76-78 lights on 65-68 lights off
Nutes are tiger bloom 2 tsp big bloom 1 tbsp
Growing medium- promix
12/12
3 ft from light and finishing week 4 of flower with really nice buds it's just the lower/mid fan leaves atm

wow
ive never seen that one before

I see mild signs of magnesium def (fix with 1/4 tsp Epsom salt)
but that has nothing to do with your problem

the black spots..are they only on the lower leaves?

I can tell you

fox farm nutes are the worst possible choice
I wouldn't use them if they where free

im not some asshole talking out my ass
I have been mixing my own liquid hydro fertilizers from scratch for over a decade
ive reviewed most of the top brands to compare ratios of nutrient profiles and fox farm hands down is the worst

if your in soil and it has some amendments some people can get by with it

your in promix which has almost no nutrients out the bag so your 100% dependent on the fertilizer

im sorry don't me to be a downer

but id start by switching brands

The black spots are mainly on the lover leaves but some rust looking spots hade it higher on one plant. What would you recommend instead of foxfarm and short of mixing my own stuff

Looks to me like a real bad salt build up. if you can pull a plant from the bucket and see if there is a massive amount of salt on the sides of your buckets. If that is the case in which I've seen before, Rinse Medium out with 3 times the amount of water to Pot size. Then I see you're using Fox Farms, Use a quarter the amount it say's to use. a Quarter or you will see a toxic build up of Salt. I am almost sure that is the Problem, then sorry off topic. after you flush the salt out, give a complete nutrient solution, if you're using the fox farms continue until done with this crop, just knock it down to a quarter doses.
Good Luck and hopfully you get it fixed.

I'm no expert but could it be p tox? @DrWho

Anyone else maybe see slight phos def?

I don't know about the black spots...where they always black or did it start out rust colored?

red speckles/freckels
could be calcium def
which might make sense since the fox farm nutes are commonly low on calcium and magnesium

are you using a calmag product also?

keep in mind its justa possibility, im not saying that's it for sure

if you want to take the time

snap a pic of the label of the tiger and big bloom and post it

I need to see the % info listed for each element listed
for example
N.......5%
P........2%
K........7%
Ca.......5%

and so on

translating that info will tell me if your elements are balanced within your mixed solution
and tell me if your over fertilizing or lacking in a specific element

those indications will help narrow down the possibilities and give us some solid info instead of guess work

What are you using for water? Fresh soil?

My vote is over fert leading to many lock outs. Check your run off ppm with straight water. If it is 2xs higher than the nutes you are putting in normally , we have found your problem. Like Bear said flush. Your roots will be cooked and need some time to recover so every other day folar feed mag and nitrogen , to limp the plants along till the flushed soil dries up a bit then water half strength nutes.


Looking at your pic's again. I am sure of it, plus your small pots are adequate however they are sensitive to going dryer then a larger pot (obviously) but also salt build up becomes apparent earlier in small pots ( because of the drying)

NaturalFarmer said:

What are you using for water? Fresh soil?

Click to expand...

pro-mix

so I found the tiger bloom bottle on the web site

I can see the npk numbers only (therefore I cant see the calcium,magnesium and micros)
they are

tiger bloom 2-8-4
big bloom 0-0.5-0.7

mixing it as you've described
10mls tiger
15mls big bloom

the big bloom alone provides very little in the way of npk fertilizer and it looks to be more of a soil conditioner with microbes and such...

the tiger bloom at 10mls (along with the big bloom) its an over all very low EC/ppm...maybe only 600ppm guessing
so I cant see how salt build up could be your issue

as to your plants nutritional needs;
the tiger bloom has a HUGE level of P (which works against your microbes) and not nearly enough N or K
all that P will give you trouble with your micro nute uptake
phosphorus competes with iron and zinc for uptake

the ratio is
1:2:2 N: P : K

N 53ppm
P 100ppm
K 111ppm

which isn't good at any stage

that's just looking at your NPK... Im sure your calcium and magnesium is also out of ratio

a balanced npk ratio would look something like

2:1:3 ratio of NPK during bloom..... 100ppm N -- 50 ppm P -- 150 ppm K
or
1:1:2 in late bloom...... 75ppm N -- 75ppm P -- 150 ppm K

as for which brand I would recommend;

I am partial to general hydro

its easy to mix and the mixing directions are with in reasonable

if you want to make it super easy(but its not the cheapest)
get the flora grow and flora nova
its well balanced and has everything you need in 1 bottle (7.5mls per gallon max dose)

then theres the 3 part which would give you more options as far as leaching N in late bloom

bloom (roughly 800ppm) ratio of npk 2:1:3
grow 6mls
micro 3mls
bloom 6mls
calmag 4mls

late bloom (optional leaches N in the last 2 weeks) ratio of npk 1:1:2
grow 2mls
micro 4mls
bloom 10mls


veg (roughly 950ppm)
grow 7.5mls
micro 5mls
bloom 2.5 mls
calmag 2mls
1/4 tsp Epsom salt
calmag 4mls

I don't usually recommend advanced or technaflora

theyre good nutes, nothing wrong with them
but the mixing directions are a nightmare and they separate there elements into as many bottles as they can to make more money

you could continue using the big bloom soil conditioner along with the general hydro 3 part
but id cut what your using in half....maybe 5mls per gallon

I wouldn't use the big bloom soil conditioner with the flora nova/flora grow
this product is already chalked full of kelp and amino products that are combined into it and im not sure if the addition of more would create a problem

pitch the tiger bloom

That's a lot of great information I'm gonna go through it a few more times to make sure I absorbed it all. What I understand so far and correct me if I'm wrong, I need to flush the plants and I'm hearing a lot that foxfarm isn't the best brand as it causes a lot of lockouts and deficiencies. I'm using foliage pro with the nutes but it's not too high in npk ratio since it's meant to be pretty light. I just got some calmag since I became impatient should I include some with the next feed? What should I switch to instead of foxfarm tiger bloom? Lastly should I switch from foliage pro to general hydro for npk?

I don't recall the foliage pro nutes

I remember looking at them but cant recall my opinion of it

as for calmag
im betting you might need it but without the % info for calcium and magnesium from the bottle of whatever brands your mixing I cant suggest how much you need

I'm gonna check them as soon as I get home. As for foliage pro it's a 3-1-2 npk ratio here's a pic of the % of everything in it

Can you get a pic in natural light?

mouhmad said:

I'm gonna check them as soon as I get home. As for foliage pro it's a 3-1-2 npk ratio here's a pic of the % of everything in it

Click to expand...

its not something I would use alone...maybe it could be used in combination with something that has what it lacks but its likely more trouble than its worth

same as before, if you where growing in soil and the soil has amendments containing the lacking nutrient it would be fine
but your not, your in pro-mix which has little in it
so your relying solely on the fertilizers

its high in N
low in K
very low in calcium
extremely low in magnesium

I could fix it by adding salts like potassium sulfate, magnesium sulfate, calcium nitrate
but that's way to much trouble to mae it worth wild when theres other products already balanced