Yellowing on leaves can someone help ID

Hey gang,
Ive got 4 plants in an ebb and flow hydro set up in a 2x4x5 tent. ive got a 600w galaxyhydro light above them (18/6). ph is kept between 5-6 and i check it regularly.

In the reservoir i'm using fox farms hydro trio and mostly following their nute chart. i've also got some of their microbe brew and root dr which i am adding intermittently.
FF Grow Big: ( 3 - 2 - 6 )
FF Big Bloom: ( 0 - 0.5 - 0.7 )
FF Bush Doctor Microbe Brew: ( 1.0 - 0.3 - 0.2 )
FF Bush Doctor Kangaroots: ( 0.8 - 0.1 - 0.03 )




Two of my plants that are slightly further along than the other two have dry/yellowing leaves from the bottom up. I assumed it was either a Zinc def. or Nitrogen but unsure which.

Any suggestions for a potential solution would be greatly appreciated.

SOrry, unsure why the image failed to host. Ive tried posting 3 times an imgur link but no dice. is there a better hosting service I should be using?

Also, if the plants are all growing very low instead of taller, is that an issue i need to be worried about?

Thanks for your help!

Add the pic as an attachment. The button "upload a file" next to "post reply".

Thanks!

Just to update, this same deficiency is now showing in 3 of my plants, all 3 have had stunted growth. Is there a good product I can purchase to add to my nutrient resevoir to raise the needed nutrient levels? has anyone had these problems before with fox farm? thanks for your assistance!

I haven't had any good luck with fox farms, it lacks magnesium sulfate and a couple other essencial nutrients, id go to your local hydro store and just talk to the guy and see what he recommends

Im pretty sure what I am seeing is Nitrogen deficiency in early veg. Im currently looking around for something that would boost Nitrogen in my mix.

are there ways i could supplement my current mix w/ additives at least for this cycle? i feel like if its just a few nutrients i could find some sort of correction for that at minimal cost, rather than switching to a whole new line of products right now.

thanks for your input!

Yeah I believe cal-mag's ration NPK is 2-0-0 so a boost in nitrogen forsure

that plant is magnesium def
get it fast and it wont show permanent damage .. its pretty far along

spray it 2 or 3x over a week with 1/4 tsp Epsom salt
to remedy it... itll likely look better over night

then we need to examine your nutes to see whats what so you don't get this problem again

post pics of the % info for each bottle of nutes you have or plan to use

Will try some epsom salt spray as you say, thanks a lot! And I'll be posting pics of ingredients info asap

anytime you foliar feed your plants, spray them the day after with clear water to clean their stomata or you may end up suffocating them.
it actually looks like overfeeding, you have leaf tip burn, thats not a deficiency symptom, thats an over feeding symptom. the curling of the leaves is symptomatic of too low rh, or too much airflow directly over the plant, or both. if its got any deficiencies, i'd say they've been caused by lockouts.

Roger A. Shrubber said:

anytime you foliar feed your plants, spray them the day after with clear water to clean their stomata or you may end up suffocating them.
it actually looks like overfeeding, you have leaf tip burn, thats not a deficiency symptom, thats an over feeding symptom. the curling of the leaves is symptomatic of too low rh, or too much airflow directly over the plant, or both. if its got any deficiencies, i'd say they've been caused by lockouts.

Click to expand...

true
could be lock out if your over feeding

does your ph rise or fall over a three day span

does your EC/PPM rise or fall over a 3 day span

the feed schedules are usually too high

There's no way that a nitrogen deficiency. Light might be too close or overwatering. Only problem is it's hard to overwater hydroton. I got a set that I run none stop except when the lights are off. How close is the light? Are your plants all clones?

its for sure revolving around magnesium

doesn't look like nute burn or lock out to me but I wouldn't rule it out without more info.....

Fox farms seems.to.be problematic in hydro.

Im partial to Dynagro products. They have some good one part feeds with all macro and micros.

well
I haven't looked at the hydro trio product

I assume its different than the organic line most peeps are having problems with

who knows the hydro trio could be just as bad as the other one

Thank you to everyone for your input yesterday, I looked into everything mentioned and learned a lot just from your comments/thoughts. Yesterday I flushed my system for 1 hour and then replaced my 3 gallon resevoir including the following nutes:
9 tsp of Grow Big Hydro
9 tsp of Big Bloom
1.5 tsp of kangaroots
1.5 tsp of microbe brew
and foliar spray of epsom salt w filtered water.

Regarding the other questions, my light is 24 inches away from the top of my biggest plant, im using filtered tap water, I have a ph of 5.5-6.5 generally and it trends upwards. I water 15 min every 3 hours, but if it looks like im overwatering i might limit that.

Here are the plants, ive trimmed away some of the worst affected leaves.


Again I appreciate the discussion, I will update as the plants change, and if I am missing anything please let me know!

This is the feed schedule they suggested

man I hate the nutes

fox farm nutes are the worst

theres no calcium in any of them

they'll say "derived from magnesium sulfate" and list no magnesium in the % info

im just not going to offer any advise on how to mix this brand anymore

after looking at your bottles ive just realized I offered advise on these nutes before and it may have been wrong
so I have to go back thru my posts history and find the guy I gave bad advise to

sorry to be a bummer id switch brands

for now in veg

id use the grow and calmag only

equal parts of each

5mls each for those small plants

10mls each for full strength

get another brand soon

ok thanks for your input, ill see what i can find to stay within my grow budget!