Cooler purple?

As your plants mature and begin to show the very first signs of flowering, we can get started with turning them into purple beauties. It largely comes down to one simple trick: lowering the night temperatures of your flowering plant, because it is chilly nights that will turn your cannabis plants purple! As a rule, you can expect your plants to turn purple when the difference between daytime and nighttime temperatures is about 15°C or more. Just keep an eye out that temperatures don’t drop too much, as this will disturb maturation. It is noteworthy to mention that the mechanism responsible for turning your cannabis plants purple is the same one that changes the colours of the trees in autumn. A more scientific explanation is that the cooler temperatures make plants produce less chlorophyll and more purple (or reddish or brownish) anthocyanins. Happy growing!