Join Sarah and Mr Pottifer in their magical plant shop, where fantastical creatures grow from trees!A new customer at the shop buys some mermaid seeds, and Sarah is only too happy to help him grow them. But when the plants are accidentally given too much sugar, their vines spread throughout the town, flooding the streets and causing a whole heap of MER-MAYHEM!Can Sarah and her new friend use their quick thinking and green fingers to save the day?This hilarious story celebrating friendship and kindness is the third magical adventure from the author and illustrator of the bestselling stories How to Grow a Unicorn and How to Grow a Dragon.

Rachel Morrisroe (Author)
Rachel Morrisroe is the bestselling author of the How to Grow Magic series, The Drama Llama and The Truth About Yeticorns. Her favourite job before becoming a writer was working at Battersea, where she got to foster puppies and take dogs for walks on her lunch breaks. Originally from Wales, she now lives in Cheshire with her husband, two young children and a very daft dachshund called Dottie Disco Dog. Visit her at rachelmorrisroe.com and @RachelMorrisroeAuthor on Instagram.
Steven Lenton (Illustrator)
Steven Lenton is a multi-award-winning illustrator, originally from Cheshire, now working from his studio in Brighton. He has illustrated many children's books including Virtually Christmas by David Baddiel, The Hundred And One Dalmatians adapted by Peter Bently, The Shifty McGifty and Slippery Sam series by Tracey Corderoy, Frank Cottrell-Boyce's fiction titles and his self-penned series Genie and Teeny.