She is talking about the beloved Chatsworth cascade, which has been a centrepiece of the garden for more than 300 years. Until last March, water had flowed down its 23 steps, descending 60 metres.

More Garden Guy Advice: Dash misconceptions about ... Making their debut this year are Fairytrail White Cascade and Fairytrail Green Cascade. Fairytrail White Cascade is different from Fairytrail ...