Pablo Escobar first time grower

plants have turned purple, due to cold I reckon. with load shedding getting really bad in South Africa I've been forced to harvest early. I don't have a battery to run lights when the government turns the power off and I think the plants have gotten stressed with the random power outages and I have spotted some bananas on both plants so im flushing with flash clean and they are in 48hrs darkness going to cut down in the next day.