Yellowing leafs with brown spots

[Zazibar]

Hello guys .
this is my first ever grow and dont really know how to fix that issue . I tried to feed them more but its getting worst.
Soil
Advanced nutrient sensi grow/bloom
part a part b
Watering at 6.3 6,5 with ph meter
22 celsius 55-60 humidity
Im running 24/7 lumatek 300w pro . Im feeding every 3-4 days 600ml - 1 l
Any advice how to rescue that ladies ?

 

[Del boy]

Hello if you could fill this out it will help people help you :smoking:

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

It looks like a ph issue to me

 

[Zazibar]

Hello if you could fill this out it will help people help you :smoking:

Problem:

Medium/grow method:

Feed: and supplements used:

water source:

Strain/age:

light used:

Climate:

Additional info:

It looks like a ph issue to me

Thanks a lot

 

[Mañ'O'Green]

It looks to me like a P-K deficiency add Big Bud to your fertigation and a one time only 1g per gallon of Epsom Salt mixed into your regular nutrient mix. Don't feed it alone.

Your pots look kind of dry?

 

[Zazibar]

It looks to me like a P-K deficiency add Big Bud to your fertigation and a one time only 1g per gallon of Epsom Salt mixed into your regular nutrient mix. Don't feed it alone.

Your pots look kind of dry?

Im watering them with 600ml to 1 l every 3-4
days depends. Is that enough ? Im afraid to feed the more

 

[Mañ'O'Green]

Im watering them with 600ml to 1 l every 3-4
days depends. Is that enough ? Im afraid to feed the more

What you need to learn about watering will come with practice. Here are the basic rules: Never let the soil dry out. Soil and or coco can become hydrophobic if allowed to dry. This means it repels water. This in turn will create dry pockets in the soil and the roots and microbes will die there. If your soil - coco have accidentally dried out use a surfactant to help re-wet it. I like yucca powder. Don't let soil remain soggy by watering too much too often. Root rot, damping off, molds, fungus gnats and other problems start in soggy soil. When you do water water the entire pot. How to learn when to water starts before you plant the seed. Fill your container with fresh soil/coco and weigh it (heft it) this is the lightest weight and consider it a dry pot. Now slowly water until the soil/coco will no longer absorb the water and run-off begins; weigh the pot (heft it) this is the maximum water, the wettest the pot can get. The difference between wettest and driest is the maximum water weight, for ease of explanation lets just say the water weighs 20 pounds. When the pot loses 10 pounds (half of the water weight) it is time to water again. There is an art to watering.

 

[Zazibar]

What you need to learn about watering will come with practice. Here are the basic rules: Never let the soil dry out. Soil and or coco can become hydrophobic if allowed to dry. This means it repels water. This in turn will create dry pockets in the soil and the roots and microbes will die there. If your soil - coco have accidentally dried out use a surfactant to help re-wet it. I like yucca powder. Don't let soil remain soggy by watering too much too often. Root rot, damping off, molds, fungus gnats and other problems start in soggy soil. When you do water water the entire pot. How to learn when to water starts before you plant the seed. Fill your container with fresh soil/coco and weigh it (heft it) this is the lightest weight and consider it a dry pot. Now slowly water until the soil/coco will no longer absorb the water and run-off begins; weigh the pot (heft it) this is the maximum water, the wettest the pot can get. The difference between wettest and driest is the maximum water weight, for ease of explanation lets just say the water weighs 20 pounds. When the pot loses 10 pounds (half of the water weight) it is time to water again. There is an art to watering.

Thanks a lot for the manual the bible of watering cheers bro