Hi Cetti
The lily of the valley I always leave until it dies down.
The Solomon's seal may have sawfly larvae eating them. Turn the leaves over & they'll be there - horrid grey caterpillar type creatures and, unless you'd care to pick them all off & 'dispose' of them (ugh!), you may as well cut your leaves down to the ground as they will strip them anyway.
Gardening isn't always a joy I'm afraid! :o)



