Anyone know what the problem is?

The yellow tips on huge older leaves r from stress from transplanting but the newer grow has light green/yellowish color to them I was wondering if anyone knew what the problem was? I just check the pH and it's at 6.2, I'm not sure what strain this is the seed was given to me!

room temp, water temp, humidity, light source could all play a factor in what the problem is. even nutrients added could play a part. kind of need to know the basics before problem is handled.

The room temp is 72, the humidity is 35%, not sure about the water temp but its not warm/hot or anything its cool to the touch but not super cold. Im currently using two 45W 400W equivalent 6500k lights

nvhak49 said:

The yellow tips on huge older leaves r from stress from transplanting but the newer grow has light green/yellowish color to them I was wondering if anyone knew what the problem was? I just check the pH and it's at 6.2, I'm not sure what strain this is the seed was given to me!

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Is total bullshit on your part ...study then study more on this early effects of nute burn,...but like a cop you gotta deal with the FACTS, avoid nutes and flush
...to my blog: https://www.rollitup.org/blogs/blog32237-flush-baby-flush.html

Wow wow why the so much hate? This is my first grow man I'm still learning as I grow that's why I posted on here to find out what it might be so give me a break!

pH of 6.2 is at the top of the range (5.2 - 6.2) but it is IN the range,
so I don't think it's pH related.

It could be the start of a magnesium deficiency???

Are you using PK13/14 ???

2 x 45w equivalent 400w....???
What?

Ya that's what I was thinking too cuz it looks a lot like that from what I've seen online, how would I fix that? Just let the pH go up too 6.5 at the max? I'm in a hydro system bubbleponic. What's pk13/14? Sorry I'm a noob I know. 2 45watt cfls that's equivalent to 400watt incandescent light bulb.

Nvm just looked it up they're nutes. I'm using the general hydroponic flora trio nutes and and aqua shield to prevent root rot

I'm still leaning twards room being to cool. making the medium to cold which might be making the roots to cold. 72 degrees is cold to me. being that late in flower like u r, u should be near 80 or slightly below.

N nitrogen
P Phosphorous
K Potassium


PK13/14 increases the P and K

with an increase of P and K the plants will require higher amounts of magnesium to stop the PK from making the plant yellow.
This is because the increased P and K throws out the plants ability to ingest N.

I have a book with a page that shows drawings of leaves with different problems.
The most similar to yours is the Magnesium Deficiency.

Pump some pure water through your system
Make a new solution for your res
EC and pH test it before giving it to the plants.

Always remember that TOO FEW NUTES
beats TOO MANY.

a mongo frog said:

I'm still leaning twards room being to cool. making the medium to cold which might be making the roots to cold. 72 degrees is cold to me. being that late in flower like u r, u should be near 80 or slightly below.

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72* is within the parameters of acceptable temperature range.
According to Greg Green
"You should aim for 75*F, but slightly warmer temps do help plants to grow a bit more quickly....
You do not want to go above 85*F, if you do you will only heat stress your plants and stunt growth....
During the 12 hours of darkness during Flower Phase the heat from lights is gone and temps can go as low as 55*F
Try not to allow temps to drop much lower than 55*....
....Below 30*F and you can expect serious plant damage...."

I'm only 4 weeks into veg., not flowering just yet, No ya I need to get a nute tester for the water too, what temp should the water be? I'll put more lights on it too to get it warmer in the room. But I'll drain some of the water out and put in pure pH'ed water in it and see if that helps with the diluted nutes if not I'll drain it all and put in more nutes than I had and see if that helps. I'll figure it out. Thanks for all the helpful responds! If anyone else knows what's going please post!

Just don't want to stunt its growth anymore than I have by transplanting..

that plant is hungry . get a real nutrient. some thing like a 10/10/10 Is perfect for veg and keep ph in check you will be doing great. the temps are normal. 72f is not cold. your getting some bad advice above. you can take the temps to 60f most strains with out any problems. my clone room is about 45 f they stay in there for 3 weeks very happy and healthy.

if your hydro. and your ph is over 5 it may be locked out. you said you were over 6. that's a serious problem. what are you feeding them as well . need to fix that ph could be entire problem

kinddiesel said:

that plant is hungry . get a real nutrient. some thing like a 10/10/10 Is perfect for veg and keep ph in check you will be doing great. the temps are normal. 72f is not cold. your getting some bad advice above. you can take the temps to 60f most strains with out any problems. my clone room is about 45 f they stay in there for 3 weeks very happy and healthy.

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so you think I should put in more nutes? I haven't put in the required strength for week3 cuz of the stress I gave it by transplanting it? I was scared I would nute burn it, but you think I might not have enough?

kinddiesel said:

if your hydro. and your ph is over 5 it may be locked out. you said you were over 6. that's a serious problem. what are you feeding them as well . need to fix that ph could be entire problem

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I check it this morning and it was reading 6.2 but I just changed the water on Friday and pH'ed it at 5.8 should I drain my res again pH it to 5.8 again or should i go lower?

General hydroponics flora trio are the nutes I'm using!

nvhak49 said:

I check it this morning and it was reading 6.2 but I just changed the water on Friday and pH'ed it at 5.8 should I drain my res again pH it to 5.8 again or should i go lower?

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6.2 is NOT a high pH.
5.2 to 6.2 is the range for hydro
5.8 is perfect
anything lower than 5.2 or higher than 6.2 needs amending.
And, if it does need changing, there's no need to drain the res.
Simply add pH down or pH up.
Dilute a little in at least 1 litre of water
add to res when the plants are not being fed (when pump is off)
and make sure to mix it well into the rest of the water.
Add 0.2ml with 1 litre water -mix it up -leave for 10 mins
TEST pH.
See how much the pH has changed.....
Pretty soon you'll knowhow much pH Down (or pH Up) will change your pH level.

It's simply not feasible to drain your res every time the pH goes out of range.
And don't get too uptight about it.
5.2 - 6.2.
If it's 6.1 or 6.2
don't try to make it 5.8.
5.2-6.2 is the Sweet Spot

Soil grows need a slightly higher pH
7.0 is the best.

An EC or PPM reader will help you to know exactly what you're feeding.
Overfeeding is much more serious than underfeeding.
And as you've already overfed them enough to cause nute burn before (which will have stunted them)
I wouldn't risk it again.
Better to leave them a little hungry - before you can more accurately test their nute levels,
than to give them too high a concentration of nutes - and potentially cause much worse problems.

I can back up every suggestion I make with supporting evidence from published experts (checkable sources).

kinddiesel said:

if your hydro. and your ph is over 5 it may be locked out. you said you were over 6. that's a serious problem. what are you feeding them as well . need to fix that ph could be entire problem

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THIS INFORMATION IS INCORRECT!
By following this advise, and taking your pH to less than 5,
you actually will lock out nutes.

Obviously both of us cannot be right....
So do some checking before you accept either of our suggestions.
5.2-6.2 is the acceptable range for hydro pH.
Go check.

(and here's a few of the buds I have growing....
They're doing surprisingly well considering my pH has been kept between 5.2 and 6.2....)