Answer: With only a few exceptions, hostas grow best in full shade, in rich, moist soil. It sounds as though you're watering enough but that the plants might be getting too much sunshine. If you can move them to a shadier spot or if you can plant shrubs that will help shade them, they'll grow much healthier and happier. The worst pest for hostas are slugs and snails. They feed at night so your rarely see them munching down, but they sure make big holes in the leaves! There are slug baits you can use. I like Sluggo. It is iron-based and doesn't harm other creatures, including birds. What I like best is that the slugs and snails go away to die so you won't have to clean them out of the flower bed.
Hope this information is helpful!
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