What is your nighttime low temp?
Fall foliage colors don't necessarily mean a PROBLEM, although they can. When chlorophyll breaks down and the green fades, some strains will show the colors of other pigments.
You may very well be nitrogen deficient, and cold, wet soil can lock out nutes. Add drain holes in those pots, even in the sides, if you are concerned that they are not drying evenly.
stinkyattic Reviewed by stinkyattic on . Leaf Turning Yellowish/Burgandy are you using soil or hydro?soil what ph is your soil or hydro setup?6.4 if your using soil what mixture or brand is it? my own mix what water temps if you are growing hydro? what are your ppms or EC?1100 what nutes are you using how much and how often? Technaflora's BC Boost, BC Bloom, Thrive Alive B1 Red, Sugar Daddy, and Magical what part of the plant is affected? Fans what size pots are these plants in and how big are they if growing in soil? 3 gallon and about 1' seeds or clones? Rating: 5