Prize-winning crossword

Use the following answers to complete this gardening saying: 5 down 9 across in 22 down, 25 across 13 down 30 across by 16 across.

ACROSS

8 Cambrian water feature in a Powys town? (9) 9 Undergo natural development (4) 10 Swollen, edible bulb (5) 11 Small, stoat-like animal (6) 12 Short-lived craze (3) 14 Chlorophytum comosum, the ___ plant (6) 15 Piece of work to be done (4) 16 Cold ___, TV drama series (4) 19 Major African river (4) 21 Po ery-firing oven (4) 23 Of land, used for growing crops (6) 25 Everything ___ The Girl, UK pop duo (3) 27 Write carelessly (6) 28 Wingless, parasitic insect (5) 29 Tall marsh grass (4) 30 Ruined, wrecked (9)

DOWN

1 Meaning of the species name ‘nana’ (5) 2 Inundation (5) 3 Beloperone gu ata, the ___ plant (6) 4 Whirlwind (7) 5 Comes into bloom (7) 6 Alternative name for sweetbriar (9) 7 Houseplant commonly called the flame ne le (6) 13 Plural of is (3) 14 Criteria by which tall, bare-stemmed plants are judged? (9) 17 Species name meaning pale (7) 18 Descriptive of the redwood, of all trees (7) 20 ___ 29 across, singer who had a Walk on the Wild Side in 1973 (3) 22 Imperial measures of length (6) 24 Parisian museum and art gallery (6) 25 Girl’s name, and green gemstone (5) 26 Toy bear (5)