With a 600% increase in new pest arrivals over the last 20 years, Peter Seabrook is always concerned about the biosecurity of plants. With that in mind, Hossein Arshadi, director of the world-famous Hillier’s nursery, joins us on the podcast.

In the garden, Peter has advice on onions and delphiniums. Plus Garden ReLeaf Day marks the start of the new gardening year, with charitable events and plenty of purchase opportunities at garden centres.

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