@Kachina624
I'm not sure that any of them are untrustworthy. I think a lot of it has to do with how and where and what zone the plants are planted in.
I have bought lavender from QVC that has a one star rating. Everyone who bought it .. over the course of a few years .. was sure that they'd received crappy plants and been lied to.
My husband was raised on a dairy farm and farmed himself until we were in our mid forties. He knows a LOT about soil types, how to fertilize, when to water, etc. He dug small "ditches", lined them with small rocks and then filled in the soil he'd purchased and made mounds. It looked like giant, long mole tunnels on top of the ground. We now have a wall of lavender out there that I have to thin out. I cut it back several times during Spring, Summer and Fall and can't stop the stuff. It grows like a weed here in NC because of the way he planted it. I have literally given pounds at a time of the blossoms and leaves away to friends and family.
We bought phlox that were a dismal failure.
But almost everything we've purchased has grown beautifully. Three years ago we purchased the gigantic hibiscus plants. They now dominate a 20 X 10' garden area and have seeded themselves with no help from us, and there are five of them out there. They are so huge that we are going to have to do some serious pruning this Spring.
I'm not saying they don't fudge the info when they talk about where the plants can thrive, and I don't buy plants from QVC withot doing homework on whether it will grow here or not.