It depends whether you have lighting in your tank. I used real plants when i first starting keeping axolotls, but because I didn't have a light on the tank they slowly died, which created a lot more mess to clean up. Axolotls will also uproot some plants while snuffling about for food and just shift them out of the way whilst swimming. I now have a mixture of plastic and silk plants which are anchored down with rocks. Occasionally they still get moved around by the axies but its much easier to plant them back and the waste is reduced. I do however have some fairy moss floating on the surface of the water which helps to filter the light out a bit, so they aren't affected by the glare.
If you are going to use real plants, look for cold water ones.
I'm assuming you meant plants and not pants...lol look above at your post.