Dear Steve:

On Feb 4, 12:40 am, "Steve" wrote:
Hello. I have a question about indoor plants and air
purifiers, or more specifically the units that add
Ozone to the room. Do indoor plants do better or
worse? Many thanks if you can answer.

Worse, in the air. Witness the damage to various stands of pine trees
near snowmobile paths, where ozone is much higher than ambient when
the Sun is shining.

Oxygen is a plant's waste product. They respire it. Ozone will try
and diffuse back into the plant's leaves, and they cannot (usually)
defend themselves from it.

Mixed in water, ozone can attack the parasites that hurt plants
(nematodes for example). Marigolds produce ozone in / at their roots
when under attack.

David A. Smith