In this edition of DIG IT, Peter Brown and Chris Day chat with Jonathon Jones OBE on all aspects of trees from the famous Tregothnan Estate in Cornwall. Jonathon discusses how a revolutionary new app – Tremap is changing the way we can record, map and share details of  trees worldwide using GPS on our smart phones.

Plants mentioned: Araucaria Araucana (monkey puzzle tree), Camellia sinensis (tea), Casuarina equisetifolia (She-oak or whistling tree), Grevillea robusta, Griselinia littoralis, Honeyberry (Lonicera caerulea), Magnolia campbelli (the flamingo of the flower world), Montrey Cupressus, Olea (Olive tree), Lagerstroemia indica (myrtle tree), Podocarpus, Poplars, Plymouth Pears, Salix (Willow), Sycamore gap tree, Tilia (lime), and Wollemi nobilis (Dinosaur tree).

Products: RootGrow, mycorrhizal fungi.

Places mentioned: Royal Botanic Garden in Edinburgh, Exeter University, Cornwall Space Cluster, Heathrow Airport (mapping Black Poplar), The Nare Hotel, Strybing Arboretum and San Francisco Botanical Garden.

People: David Noble (discovered the Wollemi in 1994 along with Michael Casteleyn and Tony Zimmerman), Richard Maxwell (Business development at Tremap), Humprey Repton (garden designer) and Robert Fortune (plant explorer).

Desert Island tree: Custard fruit tree (Annona squamosa).

The tallest Rhododendron in the UK is at Tregothnan, closely followed by a specimen at South Lodge in Horsham, Surrey – 2m difference in height.

To find out more about the Tregothnan estate, the April charity weekend and Tea.

You can download the Tremap app for Free on the two main app stores Android and Apple Store or go to www.tremap.com for more details. Some 16 million trees have already been mapped on the App.

Our thanks to Chiltern Music Therapy for supplying the music.

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