Lavender love, a dahlia extravaganza, and a wisteria masterclass.

On this week's show we take a trip to Holehird Gardens nestled in the beautiful Cumbrian landscape, with chair of the Lakeland Horticultural Society, Maggie Mees. Next, host Jenny plunges into the mysterious world of Plant Biosecurity with the RHS’s self-proclaimed plant policeman Dario Spagnoli, to find out why plants need passports, and what to do if you suspect an invasive pest has hijacked your new shrub. Finally, we cast our eyes to houseplants houseplants, specifically the rosette shaped succulents, the Echeverias, with passionate plantswoman Tracey Coogan. Host: Jenny Laville Contributors: Maggie Mees, Tracey Coogan, Dario Spagnoli Other Links:  National Plant collections episode of Gardening with the RHS Holehird Gardens RHS plant finder

As September rolls in, there's a crispness in the air and the first signs of autumn are upon us. In this episode we demystify the peat-free with Jenny Laville and the RHS’s Peat-Free Transition Coordinator, Nikki Barker – including what the definition means for exhibitors at RHS Flower Shows who will be affected by changes to the rules. Author and vertical veg grower Mark Ridsdill-Smith reveals his top tips for turning even the tiniest balcony into a thriving, productive garden. Plus, he shares which winter greens you can start sowing now for a delicious cold-weather harvest. And as the nights draw in, it’s also mating season for bats! We chat with Jo Fergusson from the Bat Conservation Trust about how you can make your garden a haven for these fascinating nocturnal creatures. Host: Gareth Richards Contributors: Jenny Laville, Nikki Barker, Mark Ridsdill-Smith, Jo Fergusson Other Links:  RHS Peat-Free Gardening hub The RHS Transition to Peat-Free Fellowship Research areas at RHS Science Vertical Veg Bats in your garden Bat Conservation Trust - Sunset Survey

This week, renowned nurserywoman Claire Austin shares her top picks of stunning bearded irises – the perfect blooms to plant now for a burst of beauty next spring. Plus, join us as we explore the vibrant world of asters with Helen Picton, discovering how these late-flowering gems can add a splash of colour to your garden just when it needs it most. And finally, we'll take a look at the remarkable conservation success story of the bittern, a bird that owes its booming comeback to the vital wetland habitats many of us can help protect. Host: Guy Barter Contributors: Claire Austin, Helen Picton, Jarrod Sneyd, Kate Bradbury, Helen Bostock Other Links: How to grow irises Claire Austin Plants Old Court Nurseries Malvern Autumn Show Leighton Moss Nature Reserve

This week, we're teaming up with The Plant Review magazine to explore how to future-proof your garden in the face of our changing climate. We discover resilient plants that thrive in both flood and drought conditions, and take a fascinating trip to a nursery that’s successfully cultivating greenery in pure sand. Plus, we find out why the unusually named Ungnadia could soon become a common sight in urban landscapes.  Host: Gareth Richards and James Armitage  Contributors: Jenny Bowden, Elisabeth Karlstad Larsen, Thomas Freeth, Philip Clayton  Other Links: The Plant Review How to choose plants for seasonally wet and dry soils Planting for the Future report  RHS Feedback email address: [email protected] Become a member of the RHS

This week we head to the Sussex South Downs to explore RHS Partner Garden, Denmans – and hear about its unique history intertwined with the lives of two unsung garden pioneers, Joyce Robinson and John Brookes. We also bring you top tips for the perfect blueberry harvest and we talk to Plant Heritage about the gaps in their collections and what they’re on the lookout for.  Host: Jenny Laville  Contributors: Gwendolyn van Paasschen, Pavlina Kapsalis, Gwen Hines Other Links: Denmans Gardens - RHS Partner Garden RHS Partner Gardens RHS Blueberries Plant Heritage - Missing Collections Become a member of the RHS

Do you get confused between your “sepals” and “stigmas”? This week Jenny Laville will be studying the anatomy of flowers, with the help of RHS botanist James Armitage. Guy Barter shares top tips for August allotmenting as we celebrate biodiversity in National Allotment Week. And RHS fruit specialist Jim Arbury talks apples and pears, with a guide on harvesting and pruning.  Host: Gareth Richards Contributors: Jenny Laville, James Armitage, Guy Barter, Jim Arbury  Other Links:  How Plants Reproduce  RHS The Plant Review The National Allotment Society  Apples and pears: summer pruning Allotments – all you need to know Fruit identification

This week we talk about all things lavender, exploring the array of varieties and sharing top tips for growing. We hear from a group of gardeners with a passion for growing and showing dahlias. Plus, we bring you a wisteria masterclass and put your mind at ease when it comes to questions about pruning. Host: Guy Barter Contributors: Tim Upson, Alessandra Sana, Vanessa Penn Other Links: RHS Wisley Garden Flower Show National Dahlia Society National Dahlia Society Facebook Page  RHS-Affiliated Societies  Become a member of the RHS How to grow lavender How to grow dahlias  How to grow wisteria

This week we explore the life and work of William Robinson and look at his enduring legacy. We take a tour of an Arts and Crafts inspired show garden at RHS Flower Show Tatton Park. Plus, we have the ultimate guide to collecting and storing seed from your own garden.  Host: Gareth Richards Contributors: Emma Raymond, Heather Cooke, Callum Bain MacKay  Other Links:  RHS Members’ Seed Scheme William Robinson Exhibition

This week we explore the history of Kiftsgate Court Gardens and catch a glimpse of their famous, gigantic, eponymous rose. We chat to self-confessed fern fanatic Julian Reed about what makes this group of plants so fascinating. Plus, we hear why thinking more about the soil microorganisms in our garden could benefit our blooms and crops. Host: Guy Barter Contributors: Anne Chambers, Julian Reed, Eddie Bailey  Other Links: Kiftsgate Court Gardens  British Pteridological Society Rhizophyllia  Become a member of the RHS

Welcome to the largest flower show in the North of England; RHS Flower Show Tatton Park! This show is all about exploring the infinite possibilities of your back garden – whether you have an acre of land, or simply a patio or windowsill – Tatton really celebrates spaces of all shapes and sizes. We visit Leon Davis’ UnPave the Way garden to find out how to transform dull paved driveways into inviting spaces which are full of clever take-home ideas designed to ‘slow the flow’ of rainwater. We also hear from some of the exceptional growers who have filled the floral marquee to the rafters with botanical wonders, and finally Tom Saunders – designer of the Orchid terrace garden – highlights some of the threats facing one of the most diverse and widespread flowering plants on earth.   Presenters: Jenny Laville, Gareth Richards   Contributors: Leon Davis Colin Hickman (Hoyland Plant Centre) John Amand (Jacques Amand Limited) Luke Whiting (D’Arcy & Everest) Tom Saunders   Other links: RHS Flower Show Tatton Park Tickets Ferns & Carnivorous Plants Show Unpave the way garden North West Regional Flood and Coastal Committee: Unpave the Way project Orchid terrace garden Inside Tatton’s Floral Marquee Long Borders The Kaleidoscope Ginnel Garden The Woodland Trust: 49% Garden