Close up of Dymondia margaretae ("Silver Carpet"), growing in flagstone gaps. We set the stones at roughly 2.5" apart and added an amended soil to the final 2" between the stones. Plugs were installed on roughly 5-6" centers. 98% filled in after 5 months. Irrigated with Hunter MP rotators at 30 minutes every 10 days. We're now backing it off since they've become established.