Prize-winning crossword

When all the answers are in place, the letters in the even-numbered squares will spell out the name of a gardening author and proprietor of the gardens at Great Dixter. 7 down and 31 across will complete the title of his popular 1970s book, The ___ Garden.

ACROSS

5 Dried stalks of grain (5) 8 Deceptive (8) 9 and 10 Famous Anglo-Sco ish train (5,4) 11 Fruit of the malus (5) 12 and 32 across Apply fertiliser or manure to the surface of soil (3-5) 15 Nicholas ___, author of the 17th century Complete Herbal (8) 18 Flowers used in brewing (4) 20 Irish singer whose debut hit was Orinoco Flow (4) 21 Substance that causes an immune response in the body (8) 22 Brazilian city (3) 27 Strong thread (5) 28 Olive genus (4) 30 Microscopic fungus used in brewing (5) 31 Of steel, improved the hardness by reheating and cooling (8) 32 See 12 across

DOWN

1 First name shared by actors Baldwin and Guinness (4) 2 ___ Sark, sailing ship (4) 3 Common name of syringa (5) 4 Handy, useful (7) 5 Common name of pandanus, from its twisted stem (5,4) 6 23 down of light (4) 7 Underground water source (4) 10 Species name meaning cultivated (6) 13 Don Everly’s brother (4) 14 Light, musical dramas (9) 16 Opuntia ficus-indica, fruit also know as the prickly ___ (4) 17 Species name meaning branching (6) 19 Shrub of the broom family (7) 23 Squared timbers supporting a floor, perhaps (5) 24 Edmund ___, rhododendron breeder who advised on planting at Nymans (5) 25 Changed the colour of cloth, for example (4) 26 Very large water feature? (4) 29 Old Testament garden (4)