Special pellets are available that will kill snails, along with other various other methods. Go to your local nursery and get the right information for your location as it does vary regionally.
put netting over it
They are known as garden snails!
Petunias bloom a lot. That is why so many gardeners like them. They are reliable bloomers from planting till frost.
It could be cutworms, slugs, or snails. Try a row cover to keep insects away.
Due to industrialization it becomes more difficult to find garden snails, but you can find them at riverbeds or ponds at countrysides. Another answer: in my experience, garden snails find you, and the problem is getting rid of them! Hostas and petunias seem to attract them.
snails are mostly scavenger's. Some species of snails are predatory; eating other snails and invertebrates.
slugs and snails
unless you want to eat raw snails, which i don't suggest.
Eating snails.
1hour
Probably eating bugs if they aren't plant eaters.
Yes, petunias are flowers.
feed it more often