Purely what Weezard says - roots need oxygen, leaves need carbon dioxide. The majority of oxygen absorption for ATP comes from the roots, and carbon for growth/sugars comes from the air.

As long as dissolved oxygen levels are allowed to remain at levels sufficient to sustain plant life, the plant will typically live as long as there is no other imbalances that will cause detrimental effects.
khyberkitsune Reviewed by khyberkitsune on . Explain why if you can I live in Pacific NW. Going thru a sopping wet spell, like water squooshes out when you step on the ground. Well just before this started, I put a couple males outside so I can harvest some pollen. Now we try very hard not to overwater our indoor stuff. We try to have a wet-to-dry before we water again to prevent root rot or suffocation. Why can these, now outdoor plants, take so much water, grow well, and show no signs of root stress at all? How can they tolerate so much water and Rating: 5