The new pitches will allow local community groups and others to use the facilities, and will bring the total number of 3G pitches in south-west Scotland to six.
The others, including Galabank, the home of Annan Athletic FC, were installed last year.
"We are future proofing the club. We are able to generate revenue from the pitch. The young kids these days train on astro turf. It's nothing new to them.
"They are happy to play on that so I think astro turf is the way forward."
More top news
More than 120 young athletes are taking part in this year's Borders Sport and Leisure Sports Academy.
A 20-year-old woman from Lancaster is in a serious but stable condition at the Cumberland Infirmary Hospital.
Over 23,000 people have been enjoying the sun at Cumbria's biggest music festival, Kendal Calling.