It looks like the threat of a major freeze into the teens is diminishing, and a lot of plants are starting to wake up so I decided to take off the tarp for my potted plants.
Here's the tarp back in February under 1ft of snow
I have since taken off the pool liner tarp. The bamboos and other plants are generally hardy enough to stay out. I separated the peonies because they have tender sprouts that still need to adapt to stronger light conditions, and likely can't handle hard freezes at this point. I have the tarp on the side in case it gets below 27F.
Phyllostachys Shanghai III/ parvifolia divisions
Tree/ itoh peonies- I planted garlic in with the itoh peony divisions to prevent fungus from growing
Here are some close up pictures showing how these peonies are very light in color due to the lack of light from being under the tarp. It has varied from 32-38F under the tarp which is more than enough to activate peony growth. Surprisingly some of them had leaves that survived through the entire winter under the tarp which got down to around 25F.
Just to show the comparison, here's a tree peony growing in one of my flower beds which shows much more red due to continual exposure to the sun. This is what I want the tarped ones to look like after a couple weeks as they keep growing.