THanks jazzgirl. They are always so obvious when one has the answers! NOw for the bottom left hand corner. I cannot get the expression required for 21A Willingly enjoy hosta cultivation 4,1,4. For the last 4 I have S? O?. I am sure an anagram of Hosta is used.
I am glad I do not have any hostas in my garden. The dead tulip leaves are bad enough for snails as it is and I am sure hostas would attract even more of them! Ugh!!