Might be hard to locate a big box home center place on Mars, never mind a lawn and garden department. Would be interesting if anyone ever figured out if terraforming, though. I guess, in theory, the road to terraforming involves being able to control the weather on Earth. Since we can't even predict the weather, let alone control it, I think terraforming is a bit of a pipe dream. If anyone figures out how to control the weather, the military applications alone would be mind-boggling.
I would think the hard radiation sleeting through the garden would result is mostly dead plants....