New Grower What is happening to my youngster? :(

[Crusty]

Hi guys, this is my first grow and I can't understand why my plant is dying

Problem: lower leafs turning yellow with brown spots

Medium/grow method: biobizz all mix

Feed: and supplements used: ph 6 - 6. 5 RO bottled water. After this started to happen I gave little bit advanced Nutrients grow and micros. But that didn't helped. Yesterday I tried to give little bit of cal mag. But also nothing positive

water source: ro bottled water
Strain/age: strain unknown autoflower its a middle of 4th week

light used: Cob CXB3590 200w

Climate: varies from 22 to 28C. Bad air circulation, poor equipment

Additional info: rest of the plants are doing fine. Just showing a little heat stress

 

[Simplicio]

You have discovered that fertilizer is poison when given in excess.
I'm not a dirt grower, but your plants have classic signs of too much food: too-green, downward clawing leaves, with yellowing tips to follow.

When you do something to a plant, and the plant reacts poorly, then what you did probably caused it.

The good news is that these plants can quickly recover, and you should be fine if you keep any eye on pH, food level, and CalMag need.

 

[Crusty]

You have discovered that fertilizer is poison when given in excess.
I'm not a dirt grower, but your plants have classic signs of too much food: too-green, downward clawing leaves, with yellowing tips to follow.

When you do something to a plant, and the plant reacts poorly, then what you did probably caused it.

The good news is that these plants can quickly recover, and you should be fine if you keep any eye on pH, food level, and CalMag need.

HI Simplicio, thanks for the answer. But it all started , when I was giving only plain phed water :/ when leaves started to yellowing, I gave little bit grow and micros (0.5ml / L), but it didn't helped. So next watering I gave all that plus little bit cal mag. But everything is still going to worse

 

[LazyNhazy]

It takes nearly a week in soil to correct issues, but the top looks healthy, if they are crammed in touching the sweating from leaves will do the same thing. Although is does look to be droopy I believe you are overwatering. Doesn't look dark enough to me for too much nutes. I wouldn't give anymore nutes at this time. Try letting her dry a bit more often before watering.

 

[Simplicio]

You should believe dirt growers

 

[Crusty]

I think it's showing phosphorus deficit? Because newer leaves also sarted to browning

I'm thinking to give them advanced Nutrients bloom, they have 1-3-4.. What do you think guys?

 

[MrToad]

Are you over watering your plant? Probably the most common mistake for new growers...

 

[Crusty]

I think I was. But now she is thirsty for sure, because I haven't watered for 3 days now. And her stems are really soft and flexible

 

[Crusty]

Maybe I should flush her?

 

[MrToad]

You need a probe moisture meter..I'm guessing you probably have some root rot now and the roots are struggling to absorb nutrients..dont flush..( limit moisture until you know where you're at)