Whitchester House garden on the outskirts of Duns will be accessible on Saturday, June 1, for flower enthusiasts to discover the grounds' unseen exotic flowers and rhodendrons that were left untouched for more than 25 years.
The gardens have been brought back to life after the hard work of Teen Challenge, a drug rehabilitation charity. At present, 19 young men are working on the garden, along with other courses designed to aid their recuperation.
Jonathon Bayles, senior support organiser for Teen Challenge at Whitchester House, said: "Teen Challenge was started in America by Don Williamson, initially in the ghettos to try and help drug and alcohol users.
"From there it has gone from strength to strength, and is currently in 90 countries across the world. We are a Christian organisation and believe God can make a difference.
"The guys go on an 18 month programme, which is intensive. They do horticulture courses with the Border College as well as catering courses and Maths and English lessons.
"The gardening gives the lads something to focus themselves on."
Mr Bayles said work on the garden, which was planted in the 1950s by then owner Stennard Landale, is ongoing, with beech hedges being cut back and older trees being removed.
"We have a fruit and vegetable area wihin the garden and the lads get a lot of enjoyment out of that.
"Hopefully in the process of opening the garden to the public we can also raise funds for improving the listed greenhouses, which are now quite dilapidated," added Jonathon.
Whitchester House was built in 1870 by Andrew Smith and is now leased to Teen Challenge, who will give money raised from the open day to horticultural charity Perennial.
When Mr Landale bought the house, he planted a variety of rare rhondendron species. However, since then the garden had rarely been maintained until the recent work of gardener Beric Wells and the team of Teen Challenge clients.
Whitchester House gardener Beric Wells said: "The gardens are beginning to emerge from their years of neglect and the Rhododendron Society has already been here to inspect some of the very rare species which we have uncovered.
"We sit at 850 feet above sea level here and spring has come a little late, but the first of the rhododendrons are already opening up and just a few days of sun will be enough to bring the others into bloom."
Visitors can see the work of Beric and the Teen Challenge team on June 1 from 2pm to 5.30pm, admission £3 with afternoon tea available. Forty per cent of admission fee will go to Teen Challenge.
The Perninnal Society also have a day at Whitchester House this Saturday, with a £15 admittance charge. Call 0845 676 0636 to book advanced tickets.