Tiarella stolons - stupid question

Pianoplayer

I put in two Tiarella in a shady moist spot, and last year they were magnificent. When they died down in autumn, I was lazy and just left them alone. This year, they are much less vigorous, I suspect due to dry cold spring. I have been watering.

There are several stolons. Should I leave well alone? Should I try and get them to root by eg pegging them down, or should I cut them off and pot them up? Any other suggestions for reinvigorating them?

Fairygirl

You can split them, which keeps them going, and you can also pull off any offshoots and pot those up. They're very easy - same as the rest of the family [Heucheras and Heucherellas] 
They do need plenty of water, so in drier parts if the country a good mulch after winter helps. 

Pianoplayer

@Fairygirl thanks, will give it a go. Have to admit to getting the watering off to a slow start in April, so need to keep on top of it.