Brown/shiny bronze spots..

[Daithy]

Hi everyone. In the past few days I noticed increasing number of these spots on my plant, actually plants, nearly all have it now. It's around the bottom leaves, the top ones are fine (well I don't have that many, they're young lol). Also, they kinda suffer with curling up nearly since born — which I don't understand, since my temps are in check.


Sum up:

• From seeds
• Plants — 2 weeks old
• Grow medium — 1/3 potting compost, 1/3 Pelite, 1/3 Vermiculite
• No feed has been used
• I watch my tap water pH and bring it down, from it's normal 7.3-7.6 to 6.4 or 6.5 using previously lemon juice, now apple cider vinegar. I always leave the water sit well over 24 hours
• Check my water's ppms and its not too much, around 200 ppm
• I have a fan blowing at the plants
• Light 600W MH, distance 2 ft today, up till now had it nearly 3 ft.
• Started misting them 2 days ago when the lights go off to moisten the leaves, not much improvement, if anything at all

Issues:

• Possible Heat Stress
• Brown Spots

Thanks every one.

 

[chunkylonin]

Looks to me like it is left over residue from misting.

 

[Daithy]

Looks to me like it is left over residue from misting.

Oh, I did not think of that . It was only a water though. Should I keep misting them in mornings for a while?

 

[chunkylonin]

Oh, I did not think of that . It was only a water though. Should I keep misting them in mornings for a while?

Are you still using the lemon juice or apple cider vinegar?It could also be mildew.

 

[acellular]

Possible thrips eating undersides of leaves?

 

[Daithy]

Are you still using the lemon juice or apple cider vinegar?It could also be mildew.

I use the acid only for water going in the soil. I used regular tap water for misting, so that means that I was misting with water with pH something over 7.