Today is the day for conflicting reports on what climate change will do to plants. It will make them grow and not grow, which is not unusual for a force that does everything. Time, The Weird Effect Climate Change Will Have On Plant Growth, reports on a study from Plos Biology, that climate change will reduce plant growth by up to 11% by 2100, by decreasing the number of growing days. The tropics could be reduced by 200 growing days. Of course this is based on the scenarios used in the study. So far, plant growth, especially crops, has increased and there are reports of greening of the Sahara.
Climate change will also make poisonous ivy, poison sumac and poison oak grow with larger leaves and more toxic poison. This is because of more CO2 in the atmosphere. Maybe this works for only certain poisonous plants and not others.
So, climate change will do just about everything. Sometimes it does opposite things at the same time. I do know that reading about this does give me an itch.