Hello auntie Betty, I've already suggested busy lizzies but how about one or two perennials too? There are some lovely ferns ..some silver/grey with red veinings. that would add " colour" and form and go well with busy lizzies..?? Heucheras with yellow or red foliage. In a shady garden these would thrive and slugs n snails would not touch them. Hellebores too. And cost less in the long run than annuals?
