What type of medium; soil or hydro? Fox Farms Ocean Forest soil Indoors or outdoors? Closet What strain? White Widow from Nirvana seeds How old are the plants? 16 days What type of lights and how many watts? 6 bulb, 4 foot, T5 light by Sun Blaze How far from the lights? 2.5 inches What is your watering frequency and source of water? Tap water every 3-4 days What, how much and when was it fed? NPK? Never fed nutes. Just water. What is the medium pH? ~6.5 for the last two feedings. Before that it was ~7.5 (untested tap water). What are the temps and humidity in the room? Usually 74 F day and night. Today it may have been in the 80's because I left the heat on at home. What size pots? 1 gallon Any bugs? Look real close. None Any other pertinent info? The discoloration just showed up today. The plants looked great yesterday. I didn't even notice anything this morning when I looked at them. I'm hoping it's a combination of needing water and being quite warm in the closet today, but the leaves weren't droopy. Here are some pics: I'm sure one of you experts can diagnose this problem right away, but for a noob like me, I have no clue. Like I said, nothing has really changed in the last couple days except the heat was on today, and I hadn't watered in 3 days, but usually they'll show droopines when they're thirsty.