Video Rating: 0 / 5 Question by michael s: why do weed plants grow more when in company with tomato plants? i have no idea why, i know tomato plants have normal photosynthesis, they take in carbon dioxide + light to produce oxygen and other stuff. The cannabis plants only start to grow more when the tomato plants become fully grown why is this? Is there a study that can help me, i just want to know for science reasons I DO NOT HAVE A CANNABIS FARM Best answer: Answer by La CucarachaIf the cannabis… Read Article →