Lindum Turf's latest turfing job - to cover the motte of Lucy Tower at 11th-century Lincoln Castle - was a first because of the steepness of the slope.
Simpson Contractors of Louth prepared the land and laid Lindum Grassfelt turf, after cutting down 25 tonnes of dangerous trees and scrub. To ensure stability, the large stumps were cut sheer to the ground and left to slowly rot down. The crested hairgrass turf mixture was cut around them for a sculpted look.
Lindum Turf managing director Stephen Fell said: "The slope made this an enormous challenge. The turf is low-maintenance but will stabilise the motte from soil erosion." Mary Powell, programme coordinator at Lincolnshire County Council, added: "Lindum Grassfelt will protect the steep bank and cut down on maintenance. It looks beautiful."
The turf has helped create sculptured landforms at high-profile buildings such as the Laban Dance Centre in London and the amphitheatre steps at Gateshead Sage Centre.
But it had never been used for anywhere quite as steep as Lucy Tower until now, according to the contracting team. The soil-less grass grows in a biodegradable-felt weed barrier that retains moisture and gives strength and flexibility.