Park managers wanted a colourful but economical and wildlife-friendly way of brightening up the lakeside which would be suitable for the water birds that graze, rest and nest beside the water.
The Royal Parks settled on Harroden Turf’s Meadowmat after spotting it at last year’s Landscape Show.
Assistant park manger Mike Turner said: "The public are enjoying this show of wildflowers just as much as the wildlife and the beauty of it is that using native species is helping to restore the balance of nature in the very heart of London."
"One huge advantage of using wildflowers so close to a water course is that their very nature excludes any use of artificial fertilisers. That means that there is no danger of excess nitrogen leaching into the lake and upsetting the balance of nutrients in the water.
"If the lake were to become too rich in certain nutrients we’d see an overgrowth of algae and weed which has a detrimental effect on the whole natural ecosystem, something we desperately want to avoid" added Mike.
Harrowden Turf sales executive Kevin Harden said the project had been "a joy and a privilege".
"I’m a great fan of urban green spaces and it’s great to see more wildflowers being used in towns and cities."