Prize-winning crossword

Complete a quotation from American writer and teacher Phyllis Theroux. ‘I think this is what hooks one to gardening: it is the 9 across 3 down 23 across 30 down to 29 down 21 down at 18 across.’

ACROSS

1 Shady garden alcove (6) 5 Parliamentary discussion, perhaps (6) 9 Shortest distance away (7) 11 Astute, canny (6) 12 Cambridgeshire cathedral (3) 13 Giant woody grass (6) 16 Organ of sight (3) 17 The States (1,1,1) 18 Divine formation of universe (8) 22 Chair in which one lies back (8) 23 Cylindrical metal container (3) 24 Tree of the Fraxinus genus (3) 26 Iris pseudacorus, ‘_ __ Flag’ ( 6) 29 Public transport vehicle (3) 31 Oval nut-like seed of the tree Prunus dulcis (6) 32 Great happiness (7) 34 Thin decorative covering of fine wood (6) 35 Optical illusion (6)

DOWN

2 Spacious (5) 3 Single number (3) 4 Rodent (3) 5 Club with dancing to recorded music (5) 6 Type of 28 down named from its nesting location… (4) 7 …another named from the colour of its plumage… (5) 8 …and an alternative name for the first, from its piercing cry (7) 10 Health resort (3) 13 Scientific study of plants (6) 14 Tract of open heathery land (4) 15 Fugitive from justice (6) 16 Get money for labour (4) 19 Engrave with acid (4) 20 ‘Li le ___’, variety of clematis, and a Dickens character (4) 21 Gift (7) 25 Find the answers to a puzzle! (5) 27 Ground ___, weed of the parsley family (5) 28 Bird of prey (3) 29 Living creature (5) 30 Arrive at a place (4)