What flowers can you grow for a September wedding? How do you tame a wisteria that's got a bit too involved with an apple tree? What's the best way to propagate snowdrops? Can you save climbers when replacing a rotten fence? Our team of experts gathers together to solve your gardening questions. Plus, advice on xylella, a major new plant disease; and we continue our mini-series on houseplants as Jane Perrone, Matthew Pottage and Anne Swithinbank share their personal favourites and offer tips on how to care for them.