A little help please guys

[Embassy1976]

Trying a grow again I tried a few years ago, it didn’t end very well.
Anyway starting off super easy with a couple of igrowcan, started one the start of June and one a week or so later initially just by the window then bought a spider farmer set up which is where they are now.
They’ve done pretty well up until now but the last four days they have got these discolouration, am I looking at too much light too much water etc or something a bit more sinister?.

Any help would be much appreciated

 

[LoveGrowingIt]

The temperature looks good. The humidity is high, though. I'd drop it down to below 60% and then ease it down to the low 50s over a few days. I don't think the problem is too much light, but knowing your light schedule would help. I think I see some signs that flowering might be starting. (Not sure, though.)

What soil are you using? How often do you water?

I've seen white spots like those before, but my brain isn't working well at the moment. I'm thinking mildew, maybe. Lowering the humidity would be the first thing to do to help with that. Healthy plants that age could take a VPD of 1.1 to 1.3.

 

[Embassy1976]

The temperature looks good. The humidity is high, though. I'd drop it down to below 60% and then ease it down to the low 50s over a few days. I don't think the problem is too much light, but knowing your light schedule would help. I think I see some signs that flowering might be starting. (Not sure, though.)

What soil are you using? How often do you water?

I've seen white spots like those before, but my brain isn't working well at the moment. I'm thinking mildew, maybe. Lowering the humidity would be the first thing to do to help with that. Healthy plants that age could take a VPD of 1.1 to 1.3.

Thanks for the info, light schedule is 18/6 kit being used is
2025 Newest Version Spider Farmer® 70X70cm Complete Grow Tent Kit丨SF1000 301H EVO Full Spectrum LED Grow Light丨6'' Clip Fan丨4” Ventilation System with GGS Controller With App x 1

Light is on around 25%, soil is what came with the can as well as nutes.

This is what you get

• 2 autoflowering seeds of Royal Queen Seeds of your choice
• 1 germination plug
• 1.7l coco compost mix when expanded
• High-quality organic cannabis nutrient

Watering every couple of days to moist

 

[voltage]

Septoria?

 

[LoveGrowingIt]

Light is on around 25%,

Should be okay.

soil is what came with the can as well as nutes.

This is what you get

• 2 autoflowering seeds of Royal Queen Seeds of your choice
• 1 germination plug
• 1.7l coco compost mix when expanded
• High-quality organic cannabis nutrient

I shop RQS, but I haven't seen that before. It should be okay. The only problem is the pots don't look like they breathe or release moisture. Most, but not all, growers use fabric pots for that reason. I use their soil plugs and have had good results with them.

Watering every couple of days to moist

Letting the soil dry is good for plants of that age. It causes them to grow deeper roots. They like it. Lifting the pot can give you an idea of when to water. Watching for wilting will, too.

 

[Embassy1976]

Awesome, thank you.
The tins are perforated at the bottom and its in a few parts so it catches the run off, great design really

 

[Embassy1976]

Managed to get humidity down to around 54% and haven’t watered. Still have some of those marks on the mid leaves but the new ones coming through don’t show any sign

 

[Embassy1976]

Septoria?

Quite possibly, again I’m a total newb so don’t know much accept what I’ve read and the help I’ve had on here.
I’ve done some pruning and got rid of any affected leaves and will keep a close eye on it.
Thanks for the input

 

[Embassy1976]

Just a little update, I’ve pulled watering right back and haven’t had any other signs of anything since I got rid of the affected leaves.
Humidity is also now under control with the help of a dehumidifier, it kept spiking before but can now get down to around 50c.
Thanks again