I've had bad luck trying to use wheels to move big plants!
Now I makes "slide runs" I either take my 10' plastic bench tops, bench master brand like Wallyworld uses for plant stands, if it's a long run, ill use 2 and leapfrog them to the destination!
I can drag a 300 pound pot myself!
Just tip the pot slightly and roll it onto the shelf and away you go!
I used to use either scrap boards, which works but it hard to keep the pots on a thin board, or doubled over used greenhouse film, it works well but you need to peg it down or the big pots just grab it and drag it along too, the really big pots dug into the ground, making for too much resistance!
Just what works for me!
If you get a dolly, take kens advice! Get a decent one with a ratchet strap!
Not sure I'd have much faith in harbor freight crap, it's usually only good for a few seasons, or when your in a pinch.
