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David explores a secret walled garden close to Belfast where globe artichokes are on the menu. Hidden Huntley is one of the 19th century \u2018linen houses\u2019 of Lagan Valley and it\u2019s been home to Antonia Malcolm\u2019s family since the 1920s. But there is trouble in paradise as Box blight has wiped out an important element of the gardens structure. Still, there is more than enough soft fruit to go around and rhubarb is being \u2018forced\u2019 \u2013 David finds out what difference it makes. Also on the programme, a visit to Ciaran Mulholland\u2019s garden at the foot of Slemish where he\u2019s dividing snowdrops \u2018in the green\u2019, work continues at Glenarm on the new woodland garden and meet the robots that garden. Get in touch with the experts on gardenerscorner@bbc.co.uk