Brown Bruises on leaves

[Fonz]

Hi,

Problem:
There are brown spots appearing on both lower and upper leaves

Medium/grow method:
Plagron Light Mix Soil with extra perlite added

Feed: and supplements used:
Sensi Bloom AB
Calmag
Voodoo Juice
all 1ml per liter

water source:
Drinking water 6.2-3 pH


Strain/age:
Jack Herer Auto 16 days old

light used:
240watt quantum board samsung 301h

Climate:
%60 humidity, 24C temprature

 

[Mañ'O'Green]

Hi,

Problem:
There are brown spots appearing on both lower and upper leaves

Medium/grow method:
Plagron Light Mix Soil with extra perlite added

Feed: and supplements used:
Sensi Bloom AB
Calmag
Voodoo Juice
all 1ml per liter

water source:
Drinking water 6.2-3 pH


Strain/age:
Jack Herer Auto 16 days old

light used:
240watt quantum board samsung 301h

Climate:
%60 humidity, 24C temprature

View attachment 1306327
View attachment 1306328

@Fonz Welcome to AFN.

Hard to say at this early stage but more likely than not too much Cal-Mag or just too much fertilizer overall. New growers have a tendency to overfeed.
Take a look here and see if this information is useful.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

 

[Fonz]

@Fonz Welcome to AFN.

Hard to say at this early stage but more likely than not too much Cal-Mag or just too much fertilizer overall. New growers have a tendency to overfeed.
Take a look here and see if this information is useful.

Tutorial - A word on Nutrients

The proper use of “salt” based fertilizer to grow Auto Flowering Cannabis. Salts: Natural and man made any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation. Learning how to use salt based...

www.autoflower.org

Thank you so much but these spots started to Show up around 10th day even before I started giving nutes. I thought they might need Calmag and thats why I added that

 

[Mañ'O'Green]

Plagron does not recommend starting seeds in light mix. It may also have been too hot for your young plants. Who knows what is in that pot?

 

[tronN00dles]

It’s pretty remarkable how many folks on here have been experiencing issues with these rusty/brown/orange spots in early veg lately - myself included.

The common denominator: adding Cal/mag early on to soil or pre-charged mediums, or having hard water in general... How hard is your water (ppm), and what’s in your soil starting off?

 

[Fonz]

It’s pretty remarkable how many folks on here have been experiencing issues with these rusty/brown/orange spots in early veg lately - myself included.

The common denominator: adding Cal/mag early on to soil or pre-charged mediums, or having hard water in general... How hard is your water (ppm), and what’s in your soil starting off?

I dont have ppm device but I think my water is around 60-70 ppm (checked the website of the water company).

and this is the information for the soil:

 

[tronN00dles]

I dont have ppm device but I think my water is around 60-70 ppm (checked the website of the water company).

and this is the information for the soil:
View attachment 1306633

Yeah looks like your medium was a little hot for seedlings. Not sure when you started feeding but it probably wasn't necessary for at least the first 10 days or so.

Anyway, I wouldn't stress too much over it. Weed is so resilient. Like I said, I overfed my plants calcium in the first couple of weeks with pre-charged soil. They got worse before they got better - 2 weeks into flower and I was contemplating chucking them and starting from scratch they looked so bad. I'm so glad I didn't. I'm in week 4 of flowering and they look great. Just keep on a good course of proper nutrients. Keep checking your pH and ppm/EC - you'll want to invest in some kind of TDS or EC device. Autoflowers like nutrient solutions under 550ppm during flowering. Go by ppm instead of "quarter strength" or "half strength".