Is this Infection or Temperature?

[RdxTV]

Hey guys, not sure what this is if anyone can help me out. I grow at between 18-25°C. Water every 3-4 days. Can see leaves with big shaded bits and I've noticed some had little dark circle spot things, any ideas? TIA

I will add that its only the sort of top 3 tiers of branches that I've noticed this on.

 

[HerbalEdu]

18°C is on the low side of the temperature range for cannabis, looks like normal coloration that could happen depending phenotypes and environemental conditions i'd say.

 

[RdxTV]

18°C is on the low side of the temperature range for cannabis, looks like normal coloration that could happen depending phenotypes and environemental conditions i'd say.

Appreciate this man, everything else looks good and I fully understand 18 is low. I try keeping above 21/22 but hard in my climate. First time growing so thank you for the feedback, I will continue to keep a close eye!

 

[Newty]

What medium are you growing in?
Whats nutrients are you using and at what dose?

If you're having issues with low temps, a supplement heater will be beneficial.

Electric Oil Filled Radiator style heaters work really well and fairly inexpensive.
If you get one that's switched and not digital, you can control them with grow controllers like the AC Infinity Controller 69 with UIS plug.
They will work with more basic on/off controllers as well such as an Inkbird.

 

[RdxTV]

What medium are you growing in?
Whats nutrients are you using and at what dose?

If you're having issues with low temps, a supplement heater will be beneficial.

Electric Oil Filled Radiator style heaters work really well and fairly inexpensive.
If you get one that's switched and not digital, you can control them with grow controllers like the AC Infinity Controller 69 with UIS plug.
They will work with more basic on/off controllers as well such as an Inkbird.

Thanks man. I use CannaTerra PROFESSIONAL medium and i use 'pH Perfect Technology - Grow/Micro/Bloom' - i dilute this in with water usually around 2/3ml/L.

Thank you also for the electric heater tip. I need something to moderate temperature and the same for humidity also, it keeps creeping up to 85-90% and i've heard the stories of budrot. Everything looks okay though, i mean i can only compare to other growers atm since this is my first. The only thing that concerned me was the dark colors and the sort of little dark spots on some leaves near the top. I have a 200w LED GROW light, i recently just moved this from 10cm above the tip of my plant (i dont really have a canopy) to around 20/25cm. I will also add its an autoflower. AUTO MAC to be precise.

Hope this helps what you asked me for in order to help a little more. Thank you!

 

[RdxTV]

AUTO MAC