Has anyone tried lining the interior of black plastic pots with felt? I was worried about having enough structure to easily move around fabric potted container trees and ordered a lot of pro cal plastic pots. They’re heavy duty, and I’ve been gathering amazon bubble wrap packages to wrap them for sun/heat protection, but concerned about interior root systems. Wondering if I can improve root health by lining the interior with felt to mimic a grow bag? Any crafty people tries this with success? I get my first bareroot shipment this week.
i hope you give it a trial! you could also try poly batting, or both 
we have a container thread going of people doing creative things with growing containers: https://growingfruit.org/t/pots-and-bags-and-containers-oh-my if you give it a go would you post in there as well?
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Awesome, thank you!
The fabric in plastic will function like plastic not fabric. Fabric root prunes because the outer layer of media dries out. In a pot the outer layer won’t dry out. The fabric might slow the roots a bit but likely not much.
Give it a try and see what happens. I could be wrong.
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Interesting, thank you for your insight! I have a ton of felt laying around so I did make some quick liners, and I’ll let you know how it looks when I up pot next year.