Leaves Light Green Between Veins

Hey Guys my plants highest two fan leaves have light green between the veins at certain spots bottom leaves are fine. I had a little white fly problem took a few nibbles on lower leaves but got them sorted. At first glance it looks like Mg def but its not the whole leave what could this be?

Strain: LSD

Veg: 2 weeks

Medium: Coco + Perlite(50/50)

Light: 400 watt MH

Light Distance: 15 inches

Room Temp: 80 F

Humidity: 55%

EC Level: 1.0

Nutes: General Hydroponics (Lucas Formula 6ml Micro, 9ml Bloom and nothing els)

Nutes Schedule: Feed, Water, Nothing, Feed, Water, Nothing

Looks ok dude,I wouldnt do anything drastic, do you check/adjust ph and what to? Alot of these kind of issues can be fixed with slight ph adjustments.6/9 sounds like Lucas formula modified for coco? Normal lucas formula is a 1:2 ratio of micro/bloom.Might want to have some epsom salts handy for this grow.On your water only days use half gram a gallon.In mean time you can raise ph to 6-6.2 to facilitate mag uptake and see if that clears it,but coco will hold mag from your plant,so you need to be prepared.

I only see very slight discoloration there.

You probably should include some of the grow fert, not just lucas. I bet there is stuff in the green bottle that are not in the other two. It looks like something is missing. People have been using the lucas idea for years. It's really more for the bloom cycle, and even then I don't know how good it is.

This site has a section for coco where it says to add 1 gram of Epsom salt for its magnesium. Since I don't know if what you're seeing is early mg def, can't tell you this will work but you could try and see what happens.
http://lucasformula.com/

polishpollack said:

You probably should include some of the grow fert, not just lucas. I bet there is stuff in the green bottle that are not in the other two. It looks like something is missing. People have been using the lucas idea for years. It's really more for the bloom cycle, and even then I don't know how good it is.

This site has a section for coco where it says to add 1 gram of Epsom salt for its magnesium. Since I don't know if what you're seeing is early mg def, can't tell you this will work but you could try and see what happens.
http://lucasformula.com/

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Im using lucas right now micro and bloom,no grow at all.Beautiful plant with no deficiencies.

I use cocohave for awhile.i never run just water.at least run 2ml cal-mag per gal always

Resinhound, are you using potting soil, coco, hydro?

Unless your using coco specific nutes, or running tap water( in some instances) you are gonna need the Epsom salts or calmag in your coco feeding, looks like you caught it early, should green right up

Looks like the start of chlorosis mostly due to lack of or not enough N. The semichlorotic intervening is what may be leading me to believe this. Possibly, I think.

polishpollack said:

Resinhound, are you using potting soil, coco, hydro?

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Right now just perlite,but I know that the modified lucas dormula for coco calls for epsom salts to offset the CEC of coco.The formula calls for 1 gram/gallon on water only days,but id still start out at . 5 gram to start

Bbcchance said:

Unless your using coco specific nutes, or running tap water( in some instances) you are gonna need the Epsom salts or calmag in your coco feeding, looks like you caught it early, should green right up

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I am using tap water not R/O water

Resinhound said:

Right now just perlite,but I know that the modified lucas dormula for coco calls for epsom salts to offset the CEC of coco.The formula calls for 1 gram/gallon on water only days,but id still start out at . 5 gram to start

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They say lucas at one stage he didn't add the epsom salt and saw no difference cause there is enough Mg in the Micro: https://forum.grasscity.com/coco-coir/863054-lucas-formula-coco.html/page-2 check post #31

Jimmy Sparkle said:

Looks like the start of chlorosis mostly due to lack of or not enough N. The semichlorotic intervening is what may be leading me to believe this. Possibly, I think.

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You could be right gona increase EC to 1.2 and see if it clears up

HerbGrower202 said:

my plants highest two fan leaves have light green between the veins at certain spots bottom leaves are fine.

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Resinhound said:

Might want to have some epsom salts handy for this grow.On your water only days use half gram a gallon.In mean time you can raise ph to 6-6.2 to facilitate mag uptake and see if that clears it

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Bbcchance said:

looks like you caught it early

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That doesn't look like a magnesium deficiency to me. I just see a slight iron deficiency. Mg def first starts affecting lower leaves, because it's a mobile element.

Hessam said:

That doesn't look like a magnesium deficiency to me. I just see a slight iron deficiency. Mg def first starts affecting lower leaves, because it's a mobile element.

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Good catch, I compleately missed the top portion part, not sure how, but I'll definately start reading far more carefully before posting

Hessam said:

That doesn't look like a magnesium deficiency to me. I just see a slight iron deficiency. Mg def first starts affecting lower leaves, because it's a mobile element.

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Dont think its iron def that usally starts in the middle and works it way to the tips of the leaves this one is weird only certain spots on the leaves some near the tips and some in the middle but not that consistant spread

What is the time frame for the feeding schedule? When you say feed, water, nothing, give the days or times this stuff takes place.

Hessam said:

That doesn't look like a magnesium deficiency to me. I just see a slight iron deficiency. Mg def first starts affecting lower leaves, because it's a mobile element.

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dont forget...those big fan leaves he's showing us...those are the lower leaves,he's LST'd that plant.I agree with jimmy he needs to up his PPM a tad

polishpollack said:

What is the time frame for the feeding schedule? When you say feed, water, nothing, give the days or times this stuff takes place.

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Day 1: Feed
Day 2: Water
Day 3: Nothing

Yea gona try raise EC have been struggling to keep it above 1.0 EC keeps dropping, even on feeding day I just gave her 1.4 EC and get back like 0.9 EC, threw a bit more till the runoff rose to 1.0 EC

I don't know jack about coco or perlite, just soil and dwc, but are you feeding 3 times in a 7 day interval? if so, is this the correct rate, because it's possible to give too much not in one dose but over time. Fert need to be in dwc pretty much all the time because with so much water the dilution is very high. you're using stuff that will trap nutrients. just curious if maybe it's a little too much. clarify if I'm wrong.

HerbGrower202 said:

Dont think its iron def that usally starts in the middle and works it way to the tips

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It's an early stage of iron deficiency. The pictures you saw from iron deficiencies were acute ones.
What container size are you using? I'm also growing in coco/perlite mix.

I think your feeding solutions have unbalanced ratios of required macro and micro nutrients and because of that, you're experiencing chlorosis and deficiencies.

HerbGrower202 said:

I am using tap water

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What's the EC of your tap water?

Just give them some time. Leaves do not pop out full of chlorophyll. It can take a few days for them to become fully green. I dont think there is any problem at all. Other than an over protective parent.