Leaves yellowing with marks please help

R

Rrrealone

Member
Hi I grow 4 gelato auto under 600w hps 24 hours light with steady 24c 50%~60% rh
I’m using advanced nutrients and feeding quarter of recommended dose
The plants are 34 days old and since approximately 10 days ago leaves started yellowing and having marks and spots it started from the bottom and climbing I water them 2 liters every 3 days approximately I thought it’s cal mag problem but two waterings in a row I feed calmag and it still climbing up almost reached the tops the plant keep on flowering regularly and beside it getting yellow and marks and the low leaves got rusty funnily it still flourishing what do you think guys please help meB808E27B-4055-4AD3-9EA2-01450A51AE63.jpegF53754A7-A6F0-4801-B59F-BA242E1F1465.jpeg
 
myke

myke

Well-Known Member
Calcium deficiency usually shows first on the upper leaves or leaves that are growing the fastest.Low pH can block calcium out also.
What have you been feeding other then calmag?
 
R

Rrrealone

Member
myke said:
Calcium deficiency usually shows first on the upper leaves or leaves that are growing the fastest.Low pH can block calcium out also.
What have you been feeding other then calmag?
Click to expand...
I have almost the whole set of advanced nutrients I use quarter recommend dose from each
I give it 6.5 ph average and it’s chaleted nutrients so it should absorb anyway
 
JimmiP

JimmiP

Well-Known Member
I would get it off of the floor a couple of inches and increase the temperature about 3 degrees Fahrenheit. Cool hard floors draw heat energy out of the root zone.
It looks like the plant is drawing what it has stored in the leaves. Which is normal. But cold roots can cause problems with phosphorus and magnesium uptake. The yellowing should slow down if you can keep the roots a little warmer. Try to keep the bottom of the pot in the around 24c.
 
R

Rrrealone

Member
JimmiP said:
I would get it off of the floor a couple of inches and increase the temperature about 3 degrees Fahrenheit. Cool hard floors draw heat energy out of the root zone.
It looks like the plant is drawing what it has stored in the leaves. Which is normal. But cold roots can cause problems with phosphorus and magnesium uptake. The yellowing should slow down if you can keep the roots a little warmer. Try to keep the bottom of the pot in the around 24c.
Click to expand...
I took it out the tent to take a normal picture inside the tent it’s about 10 cm above floor on plastic tray to collect runoff
 
myke

myke

Well-Known Member
Rrrealone said:
I have almost the whole set of advanced nutrients I use quarter recommend dose from each
Click to expand...
Its a tough balance using all those,I think they do more harm then good.Basic NPK fertilizer WILL work just fine and save you a bunch of money too.Good luck.
 
myke

myke

Well-Known Member
Also if its the bottom leaves and moving up its probably Nitrogen deficiency.But cant be 100% sure
 
xtsho

xtsho

Well-Known Member
Rrrealone said:
View attachment 4892110
Thanks for trying to help guys here’s picture of the whole plant what am I doing wrong?
Click to expand...
You're dumping too much stuff on your plant. 1/4 strength or not. In small pots like that you can get excesses of some nutrients while others are locked out due to nutrient antagonism. After awhile the plant can show signs of both deficiencies and over feeding. You have some curled tips, fried leaves, yellowing, that plant is not happy. If I were you I'd cut out everything except just the base nutrients. Regardless of what you do that plant will likely get worse before you harvest it. You're not going to win the race but you can finish it. You're just going to have to crawl across the finish line. It won't be the best finish but it is what it is.


Good luck.
 
R

Rrrealone

Member
xtsho said:
You're dumping too much stuff on your plant. 1/4 strength or not. In small pots like that you can get excesses of some nutrients while others are locked out due to nutrient antagonism. After awhile the plant can show signs of both deficiencies and over feeding. You have some curled tips, fried leaves, yellowing, that plant is not happy. If I were you I'd cut out everything except just the base nutrients. Regardless of what you do that plant will likely get worse before you harvest it. You're not going to win the race but you can finish it. You're just going to have to crawl across the finish line. It won't be the best finish but it is what it is.


Good luck.
Click to expand...
Base nutrients at what dosage keep with quarter?
And I have 3 other plants that this issue only begins with them they look much better so with all of them stick with the base and that’s the best I can do?
Do you think it’s enough 2 liter for 18 liter pot?
Should I remove all/part of the damaged leaves?
 
myke

myke

Well-Known Member
So what I would do on the other plants is mix up a low EC of your base nutes say .5 and water them to a good runoff. Like put them in a sink or bathtub and pour enough in to wash out all what’s in there. This will reset things. From there you can do a water water feed schedule. When it’s feed time you always want to get runoff to push out the old food. This is more of a beginner way of growing. Works well you may use a little more nutes but it takes the guesswork out. Good luck.

edit. Providing your other plants are big enough. Don’t do this to a small plant in a big pot. Do you have photos of the other plants?
 
R

Rrrealone

Member
myke said:
So what I would do on the other plants is mix up a low EC of your base nutes say .5 and water them to a good runoff. Like put them in a sink or bathtub and pour enough in to wash out all what’s in there. This will reset things. From there you can do a water water feed schedule. When it’s feed time you always want to get runoff to push out the old food. This is more of a beginner way of growing. Works well you may use a little more nutes but it takes the guesswork out. Good luck.

edit. Providing your other plants are big enough. Don’t do this to a small plant in a big pot. Do you have photos of the other plants?
Click to expand...
I will post a picture tomorrow but they’re the same size as the on the picture
 
myke

myke

Well-Known Member
Rrrealone said:
4.5 approximately
Should I wait till the soil gets dried to “wash” it or should I do it as soon as I can?
Let’s say 9 liters each will be enough?
Click to expand...
You have more then one yes? Try one first half dry is good.Remember it will be soaking wet so it needs a warm spot with airflow.How long have they been in said pot?
 
myke

myke

Well-Known Member
Shit hang on,these are autos right?.I have no idea if flushing is a good idea. Ive never grown an auto.Do some googling and let me know.
 
You must log in or register to reply here.
Top