How would you solve this problem

[GreenFlash]

Hello!

I've got a problem. In my area it was real high tempreture. I thought it was underwatering, but it seems there is some other problem. I have black spots under the leaf. And all plants are dying. How can solve the problem?

I took some photos of leaf. Thank you in advance.

Leaf1
l2
l3

 

[greenertea]

Looks like over feeding to me, but need more info: how old are they, how much u feeding them temps etc, and can u put up a pic of the whole plant.

 

[Coba]

i think you are right about your underwatering issue.

 

[Wendull C.]

Check for thrips.

 

[3oShivaRider]

Looks like cal mag deficiency! Feed them some cal mag supplements and they should be fine within a couple of days. Also check for any traces of mites and spray neem oil on them.

 

[Van Diesel]

Defo need more info, style-temps-feed/ph , if soil what's the soil like, is there a funky smell? If Under watering you should of noticed the droop

 

[LyryC]

Root Bound?

Root Bound?

Root bound plants exhibit these traits which usually look like burn or deficiency.

If you haven't transplanted in a while or there isn't a large amount of medium/rootmass vs the plant mass then this exact problem will arrise.

DON'T LET THEM GET ROOTBOUND!

 

[RonSmooth]

You really need to provide some more info for a decent diagnosis.

What are you feeding it? How often?

Is the problem localized or does it affect all leaves? Does it start from the top or bottom?

What is your medium? How old are the plants/what stage of growth? What size containers?

How often do you feed/water? How much?

Pics of the entire plant would help as well.

 

[Crusader Rabbit]

Looking at the undersides of those leaves I sure wish I could zoom in with a magnifier to look for critters. Those leaf tips don't look burnt and crunchy as much as just pitifully dead. As everybody says, we need more information. But I'll throw out an idea and it is over watering.

 

[Coba]

google black speck disease. its a bacteria infection.

 

[GreenFlash]

Thank you all! Sorry for late answer, I was out of space You can watch the show here Grow Diary