Answer: These plants are usually pest free with the most common problem being spider mites, and those do not eat the foliage. So, my first thought is slugs. Slugs are nocturnal and leave a silvery trail behind. You can hand pick them in the evening, trap them with beer-baited slug traps, or bait them with products that contain iron-phosphate. Another possibility is wind damage, these can become battered and it might look like something ate them. Another possibility is a caterpillar of some sort. These can be handpicked or you can use Bt (products such as Dipel). I hope this helps!
Q&A Library Searching Tips