First Time Grow - Brown spots on leaves

Hi there,

Growing 2 Snow White in an NFT system. Currently we're sitting 13 days from seed and all is going swimmingly well, apart from this outbreak of brown spots on one of my plants. Thanks in advance to anyone who can help shed a light on the situation.

ive had that problem b4 and came to the conclusion that it is heat burn not light burn. Do you have any ventilation setup for your plants?

ynkessuck247 said:

ive had that problem b4 and came to the conclusion that it is heat burn not light burn. Do you have any ventilation setup for your plants?

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Hi, bud, and thanks for the reply. I don't have any active extraction for my closet yet (though this will be remedied come the end of the month when I get paid) but I do have an oscillating fan blowing across the tops of my plants and a passive intake. Room temp is on average 25C and my 250W light is 3 feet from my plants. Although this issue is confined to the lower set of leaves on my plant, I've noticed a new oddity occuring in the new growth emerging this morning. See pics. This is really starting to worry me now. Any suggestions at all? Thanks in advance.

Are you pH testing your reservoir?

I am that, yes. I try to keep my pH within the 5.5 - 5.8 range.

honestly the new growth looks like a nutrient deficiency, try raising your pH because 5.5 may be preventing the plant to uptake nutrients. Correct me if im wrong, but both images look like different problems. Image with fan leaves looks more like heat burn.

View attachment 1227535this will give you a good idea about pH levels.