well.. to much heat is usually shown in the stems first.. they tend to change colour, usually go red.. you'd also notice an overall plant health degredation since to much heat WILL kill the plant. as will to much water.

pics! pics are needed for more help
BobBong Reviewed by BobBong on . A bit too much yellow I have 4 plants in a small indoor space. I am using a organic wormcasting based liquid fert blend. Lights include a 240 watt hps and 2 smaller low-heat lights, which complete the spectrum. They have been doin really great, now they are about 3 weeks into flowering and it seems that a little too much leaves are yellow then normal, including a few that are not bottom leaves. I am sure it is not a fert or ph problem. I think it is too much heat, or over watering. I have been keeping a closer Rating: 5