Nutrient Deficiency?

Hello All,
I’m 15 days into flower. Growing Blueberry in FFOF. For the last 5 days or so I’ve been seeing more leaves turn to the color below. I have the FF trio of nutes, but have yet to use ANY nutrients.

Based on this chart:

I need to add either or both Manganese / Potassium.

PLEASE advise…

Why don’t you fill out a support ticket anyway which will start things off quickly

COPY/PASTE: This “Support Ticket” into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA

Strain; Type, Bag seed, or NA

Soil in pots, Hydroponic, or Coco?

System type?

PH of runoff or solution in reservoir?

What is strength of nutrient mix? EC, or TDS

Indoor or Outdoor

Light system, size?
Temps; Day, Night

Humidity; Day, Night
Ventilation system; Yes, No, Size
AC, Humidifier, De-humidifier,

Co2; Yes, No
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you smile

When is the last time you checked the calibration on your ph meter?

Strain: Blueberry Photo.

Soil in pots, Hydroponic, or Coco? Soil - Fox Farms Ocean Forest (FFOF).

System type? I don’t know what this means.

PH of runoff or solution in reservoir? Always watered with ph 6.5 RO water with a Calcium & Magnesium (30-100PPMs) added. I have never measured runoff.

What is strength of nutrient mix? N/A - Have never added nutrients.

Indoor or Outdoor? Indoor.

Light system, size? LED approx 600 watts at the wall.

Temps; Day, Night? 75 / 71

Humidity; Day, Night? 55 / 64

Ventilation system; Yes, No, Size? Yes, 6" inlet fan and exhaust fan. ~250cfm

AC, Humidifier, De-humidifier? A/C runs during the day and maintains the grow room at 70F

Co2; Yes, No? No

The more info the better like @Myfriendis410 says. Since I’ve been trying to follow along, I’m thinking you definitely sound late on feeding.

What are you watering with? If you’re water ppm is low some calmag probably wouldn’t hurt either.

Edit… we posted at same time lol.

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I don’t use fox farm but I’m sure that start giving more p around transitioning on schedule. Probably like a week 5 or 6 feeding. And you’ve been supplementing cal mag, but 50-100 ppm still sounds a little low on ro water. My tap runs around 300 ppm, and there are a few times I’ve still had to some calmag.

Unless someone with more knowledge on the ff nutes has better suggestion, I’d try a week 5 or 6 feeding and double up on the calmag, ph’d of course. And then I’d take a look at runoff.

I’m not a soil grower, but 15 days into flower this sounds like an issue to me.


Some cal mag is being added, but not much.

@HappyCamper is the discoloration starting low and moving up? I suspect nutrient deficiency as well. As @dbrn32 pointed out you could probably use some.

FF recommends flushing at certain points during the grow and if you haven’t, you might consider doing that before introducing nutrients.

I would download the FF feeding schedule and make sure that there is some N in the nutes you start with as I suspect you are showing beginning N deficiency.

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I would have to see a picture of the entire thing but it looks like it’s starving if you have not fed it it’s hard to tell from the one pic it’s a I’m staving Deficiency She probably used all of the nutrients that are in the Fox Farm soil originally but I would definitely start feeding but I would love to see a picture of the whole plant if possible

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Here’s a picture looking straight down on the canopy. You can see some unhealthy leaves inside the center. I couldn’t zoom out any further with the camera phone…


How many weeks of flower? @Countryboyjvd1971 here we go buddy see what you think :thinking:?

From the front showing the whole canopy


And the undercarriage:


@HappyCamper They look fabulous I would start feeding her she has used up the Nutrients from the Fox Farm now it’s time to add them from here on out you’re using the fox form Treo


I flipped the lights 24 days ago, it’s been in flower for 14 days.

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I’m with @Hogmaster on feeding them and you’ll probably need to feed extra cause of all the extra growth usingbthe scrog technique but I would start with your normal flower bite base numbers and adjust as needed @HappyCamper


Unfortunately I watered her today. She’ll have to wait for 2 days.

She’s in a 10gal soft pot and I give her 2 gallons of water every 2 days. I see no runoff with this much water. Do you think I should be giving her more water?

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I would makes a gallon the nutrients and put it on top as well ! I usually water till there’s run off


Water film you get run off that how you’ll know your soil is fully watered @HappyCamper
When I feed I woutld put a gallon or gallon and a half of water phd of course first then feed 1/2 gal to 1 gal nite mix just make sure your don’t over feed
Go with the ff feeding schedule for ppm range
I can look it up for you if you dine have it

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Thanks! This is the first time I’ve had any issue with the plant. I’m a bit concerned… I’ll plan on adding Fox Farm Grow Big the next time I water. It seems to have a lot of (N)itrogin as the bottle shows 6-4-4. I’ll start with 1/2 the recommended amount.

I normally never recommend using half strength nutrients I see it like a person if you’re starving and someone hands you a cracker you’re going to be pissed because you want the whole pack a lot of people do it but that’s your call if it were my plants I would go full strength