Answer: Based on your description I am not sure what ate your plants, but it is possible you had a slug problem. Their favorite foods include hostas and tender baby annuals and they eat big bites. They eat at night so you never see them, but you do see shimmery "slime trails" sometimes. You can try a barrier of diatomaceous earth spread around the plants or you can try trapping them with saucers of stale beer or the commercially available traps. They are attracted to damp spots so avoid watering at night, too. I hope this helps!
Q&A Library Searching Tips