Olivenbaum 17 Jahre, 180cm toskanagartenshop Photosynthesis & Oxygen Production (Daytime) Most trees and plants produce oxygen during the day through photosynthesis, which requires sunlight. They absorb carbon dioxide (CO) and release oxygen (O). What Happens at Night? Savoir planter et entretenir un caoutchouc (Ficus elastica) Fig tree losing leaves but still producing figs? You Can Grow It: Cucamelons