I've been drowning quite a few slugs this last week in beer traps. When I first tried a dish of beer, they didn't go for it. It might have been because all we generally have around is dark beer. I bought some cheap Guatemalan beer (Gallo) just for the slugs and they are definitely attracted to it. I've killed about 15 in the last 4 days, I need to get some more small containers so I can put more traps out. I go out every night to see how many I'm getting, tipped a big one over into the dish the other night as it was so long it was hanging off the top of the bowl and drinking the beer.
The Stromanthe is relatively expensive here, I think the large ones were $450 pesos (about $35us). I'm worried that by the time the rains start, the supply will be gone so I guess I'll have to buy at least one now and keep it going during the rest of the dry season. We have a saying here, if you see something and want it, buy it right then because it will likely be gone the next time you look for it. I'd really hate for there not to be any once the season changed.
The place I have in mind for them is under a couple of large fish tail palms. They shade the area most of the time, more like dappled sunlight. It's an easy spot to keep watered and the entire bed was taken down to the limestone bedrock and filled with pretty good soil. I just need to keep the dogs out of it while they get established.