or, if you are a hypertufa user, you can gather some moss, pop it in the blender with some yogurt … and then 'paint' your tufa …. it works, over time

Sound good but I was thinking would my idea be feasible.

Entirely possible and not very difficult to do. Peat moss, however, is not a precise term. There are more than 100 species of sphagnum moss all of which can become the "peat moss" of horticulture as they decay. Long fibered sphagnum moss is available in bags at many garden centers and will usually come back to life given moisture and humidity. Probably easier is to start with live moss such as haircap moss or another low growing type. Gather some - with permission - from a wooded area or buy online. Two cautions: moss needs high humidity provided by misting or an enclosure like a terrarium, with little or no direct sunlight, so the container plant itself will have to be adaptable to these conditions. Moss naturally grows in areas of low fertility. Excessive fertilizer can easily kill it, so the container plant should have low fertilizer needs.