Brown spots on leaves with yellow margins

[JustGrower]

Hello. Firstable, I would like to say Hello to everyone. I am new here. I found this forum when I was looking for some informations some time ago, to be honest I even don't remember what exactly ;) But I like and I want to ask you guys for help. I "just" started growing. I grow 6x autoflowering plants:
2x Forbidden Runtz
2x Banana Purple Punch
2x Lemon Cherry Cookies
All from FastBuds.
My setup:
Box: Marshydro 150x80x200cm
Light: Marshydro FC 4000Evo (320W)
Ventilation: fi150

I need help with one plant but I think problem is coming to the other.

Pot: 9liters
Soil: Plagron light mix + I added extra perlite, clay plebbs on the bottom
Nutrients: Canna mineral nutrients(vega, flores, rhizotonic, cannazym, pk13/14, boost)

Plant has brown spots on the leaves with yellow margins:

32 days old.

I am amator and I think there is problem with calcium and magnesium.

But what is weird - at day 29 I saw little deficiency of magnesium so I decided spray calmag. I made nutrition solution from RO water with only cal mag from T.A.(npk 2-0-0 4%calcium, 1% magnesium) I don't know how much ml exactly I add but EC was 0.6. Next day was still ok(green leaves with no brown spots), it was watering day. It was first watering with nutrients from beginning. I made:
-tap water = 0.37EC
-cal mag = 0.2EC
-terra vega = 0.65EC
+ rhizotonic, cannazym, boost
Together 1.2 EC, pH 6.4.
First time I watered till runoff. Runoff EC 1.3, pH 6.3.
After next day I opened tent and notice these brown spots. What is going on? Can someone tell me what went wrong? CA deficiencs after suplement?

If I forget about any information just let me know. Sorry for my English, it is not my nation language. I do my best ;)

 

[GNick55]

Hello. Firstable, I would like to say Hello to everyone. I am new here. I found this forum when I was looking for some informations some time ago, to be honest I even don't remember what exactly ;) But I like and I want to ask you guys for help. I "just" started growing. I grow 6x autoflowering plants:
2x Forbidden Runtz
2x Banana Purple Punch
2x Lemon Cherry Cookies
All from FastBuds.
My setup:
Box: Marshydro 150x80x200cm
Light: Marshydro FC 4000Evo (320W)
Ventilation: fi150

I need help with one plant but I think problem is coming to the other.

Pot: 9liters
Soil: Plagron light mix + I added extra perlite, clay plebbs on the bottom
Nutrients: Canna mineral nutrients(vega, flores, rhizotonic, cannazym, pk13/14, boost)

Plant has brown spots on the leaves with yellow margins:
View attachment 2449224
32 days old.

I am amator and I think there is problem with calcium and magnesium.

But what is weird - at day 29 I saw little deficiency of magnesium so I decided spray calmag. I made nutrition solution from RO water with only cal mag from T.A.(npk 2-0-0 4%calcium, 1% magnesium) I don't know how much ml exactly I add but EC was 0.6. Next day was still ok(green leaves with no brown spots), it was watering day. It was first watering with nutrients from beginning. I made:
-tap water = 0.37EC
-cal mag = 0.2EC
-terra vega = 0.65EC
+ rhizotonic, cannazym, boost
Together 1.2 EC, pH 6.4.
First time I watered till runoff. Runoff EC 1.3, pH 6.3.
After next day I opened tent and notice these brown spots. What is going on? Can someone tell me what went wrong? CA deficiencs after suplement?

If I forget about any information just let me know. Sorry for my English, it is not my nation language. I do my best ;)

need more pictures of plant/s,

 

[Week4Bytch]

Hello. Firstable, I would like to say Hello to everyone. I am new here. I found this forum when I was looking for some informations some time ago, to be honest I even don't remember what exactly ;) But I like and I want to ask you guys for help. I "just" started growing. I grow 6x autoflowering plants:
2x Forbidden Runtz
2x Banana Purple Punch
2x Lemon Cherry Cookies
All from FastBuds.
My setup:
Box: Marshydro 150x80x200cm
Light: Marshydro FC 4000Evo (320W)
Ventilation: fi150

I need help with one plant but I think problem is coming to the other.

Pot: 9liters
Soil: Plagron light mix + I added extra perlite, clay plebbs on the bottom
Nutrients: Canna mineral nutrients(vega, flores, rhizotonic, cannazym, pk13/14, boost)

Plant has brown spots on the leaves with yellow margins:
View attachment 2449224
32 days old.

I am amator and I think there is problem with calcium and magnesium.

But what is weird - at day 29 I saw little deficiency of magnesium so I decided spray calmag. I made nutrition solution from RO water with only cal mag from T.A.(npk 2-0-0 4%calcium, 1% magnesium) I don't know how much ml exactly I add but EC was 0.6. Next day was still ok(green leaves with no brown spots), it was watering day. It was first watering with nutrients from beginning. I made:
-tap water = 0.37EC
-cal mag = 0.2EC
-terra vega = 0.65EC
+ rhizotonic, cannazym, boost
Together 1.2 EC, pH 6.4.
First time I watered till runoff. Runoff EC 1.3, pH 6.3.
After next day I opened tent and notice these brown spots. What is going on? Can someone tell me what went wrong? CA deficiencs after suplement?

If I forget about any information just let me know. Sorry for my English, it is not my nation language. I do my best ;)

Could be calcium. My first reaction is calcium. Seems like 1.2 ec is a little high for autos. but if they seem to like it keep going. The other idea is ph swings in the soil can look the same as them brown spots. Maybe a photo of the entire plant/plants? And I'd just stick to the calmag foliar sprays versus adding it with the nutrient feed, might throw something off. Hopefully someone here can help you dial this in, good luck man, and more pics please.

 

[JustGrower]

Thank you guys for reply. More photos:

She just woke up. Also I don't know if the purple stems are ok? I read that can mean phosphorus or magnesium deficiency.

Sure, I can only spray with calmag but can you tell me what EC of solution should be? Company T.A., on the bottle they inform 1-1.5ml per one liter when I use tap water(my tap water is like 0.37EC) or 2ml with RO water.

 

[AsheyBear]

I’m curious if you’re over watering and possibly causing root rot that is coming off like a nutrient deficiency
I had a shorter girl who had the same issue
I dried out the soil and adjusted my watering schedule and it seemed to help the burns disappear.
Coulda been a nutrient problem though to be honest

Do your leaves always face down, or do they pray often, am I’m just seeing a photo between waterings?

I’m truly not sure, but I’m keep an eye on your thread cause I’ve had this issue before

 

[JustGrower]

Normally I was watering 0.8-1l per pot(9l) but one day(before starting problems) I put 2liters because I wanted to check runoff. Also, I had suspicion for too much nitrogen. Thats why I made little "flush" to check parameters.
Probably after "flush" I waited too long for next watering and now, I guess, there is underwatering. I already watered plants. Leaves going to be normal. I will check tomorrow.
So in short, probably you are right. Overwatering + underwatering after few days.

It is werid for me because I am new grower and I got symptoms similar to calcium deficiency but I "forget" that it could been little overwatering. So
I will take care for them and in few days I let you know what is going on in my garden ;)

 

[AsheyBear]

I’m with ya man! Had this same thing happen
For a new grower, you’re doing a great job!! I’m on my fourth grow, so I’m with ya on freshness

In the end, you’ll get some weeds!! :)
Happy growing partner

 

[GNick55]

ya kinda looks a tad watered too frequently and the light could be a tad to close

 

[JustGrower]

Dziękuję za odpowiedź i porady ;)