Prize-winning crossword

Use the following answers to complete a quotation from 20th-century American poet and novelist May Sarton: ‘A garden is always a 2 down of 23 down 7 down 17 down a 29 down 10 across, 15 down 16 down 22 down.’

ACROSS

1 ___ nidus, the bird’s nest fern’ (9) 6 Capital of Norway (4) 10 Is victorious (8) 11 Played a role (5) 12 Daughter of Zeus, and an evergreen, flowering shrub (4) 13 Kalmia ___, the mountain 3 down or calico bush (9) 18 Classic flat race among the quercus? (3,4) 20 The K of UK (7) 24 Variety of helenium found on the chessboard? (3,6) 27 Norse god of thunder (4) 28 Presents (5) 30 Female giving massage (8) 31 Plants seeds (4) 32 Time for cereal? (9)

DOWN

2 Sequence of related TV programmes (6) 3 Shrub with dark green, glossy leaves (6) 4 Himalayan country (5) 5 Knock over (5) 7 Of blossom, form into fruit (3) 8 Person whose beard provides the common name of Clematis vitalba (3,3) 9 Food colouring and flavouring from the dried stigmas of a crocus (7) 14 Lowest female singing voice (4) 15 Find agreeable or satisfactory (4) 16 That’s ___, former TV consumer affairs 2 down (4) 17 Opposed to (7) 19 Pre-privatisation initials of the organisation that publishes official and government documents (1,1,1,1) 21 Presents a play (6) 22 By ___, automatically or unaided (6) 23 Cut one’s ___, abandon an unprofitable enterprise early (6) 25 Greek epic poet (5) 26 Spaghe i, for example (5) 29 Not many (3)