My invitation read: “Come and visit Bowood’s famous spring planting; and Lord Lansdowne will lead a tour of his woodland garden.”

Who could resist such a missive. Not me! So I set off for Wiltshire- dreaming of camellias, magnolias, rhododendrons and azaleas galore!

And what I found was one of the best spring gardens I’ve ever visited. Over two miles of paths meander through the 30 acre garden- set within a former quarry. A stream runs through the valley with banks of ferns, candelabra primroses and bluebells either side.

Now, I’ve been on these garden visits before, where tours are promised. The owner is often there for a welcoming reception- but then frequently hands over to staff for the tour itself. So I was surprised and pleased to see Lord Lansdowne standing by his offer and giving us a walking tour of his garden – and one that ran an hour longer than planned.

If you come to visit my garden, I’ll take you around, show you the tree I planted when we moved here, my favourite seat, my favourite shrub and the plants I inherited from my grandparents’ garden. To be honest, our visit to Bowood felt just like that; a keen gardener showing us around his plot – with all his favourite trees and shrubs and viewing points. As soon as we arrived, Lord Lansdowne pointed to a group of cornus dogwood trees and described them as his “pride and joy.” And then followed a chat about how difficult they are to grow, and how “wonderful” they look when the white bracts appear in spring. His enthusiasm is something we all share as gardeners. We nurture and plant something, and then stand back and admire it, and want to share that moment with fellow gardeners. It’s something I recognise and understand.

One thing I haven’t got though (ok, there’s no rolling acres and stately home either) is a rhododendron named after me. This one is Lord Lansdowne’s – it’s rather lovely, with peachy cream petals and pink buds.

I can see why this is one of his favourite views, looking out from the garden. We are standing on the mausoleum steps looking out across the tops of the rhododendrons through a gap in the trees.

Some of the rhododendrons are called Bowood Hybrids, and Lord Lansdowne showed us the nursery beds where his selected seedlings are planted. He said they could be sitting there for 10 years before he’d know if they were something special or not. Patience is obviously a virtue when you are growing new varieties like these.

I must admit, there were a dizzying array of variety names as we walked through the woods. I should have written them down, but I was just listening to the commentary and enjoying what turned out to be a most unusual and special day. I mean, how often can you report that you were meandering through the woods and suddenly there on the path is the celebrated plantsman Roy Lancaster!

Roy, who is writing about the gardens, stopped for a chat and joined our group for a photo. It was fascinating to hear the two friends talking, the Latin names flying back and forth. And later, we visited a patch called Roy’s Corner, where specimens brought back from Roy’s plant-finding expeditions are being nurtured. Altogether, it had been, a day like no other.

Bowood Woodland Garden opens from 28th April until early June. Check the website for details. http://www.bowood.org

No wonder the owner admits he spends every Saturday lunchtime having a picnic in the gardens. I think I would too.

Many thanks to the Garden Media Guild for organising this visit to Bowood. If you work in horticulture, you can become an associate member. Membership is open to anyone working in garden writing, broadcasting and photography. Probationary membership may also be available for new starters in the profession and there are training courses and mentoring schemes available.