I once had an Acer in a large tub on the patio and to make it look extra pretty I put a carrier bag full of little fir cones that I had collected out on a winter walk . In the spring I had a crop of baby fir trees pushing up through the cones ! ::)
At that time , although very interesting , I didn,t really want them . Now I am trying to grow them , I have sown them in pots of compost with added grit and environmesh over the top to stop the squirrels and mice nibbling them , they are outside to give them a cold period before the sunshine in the spring wakes them up . The Monkey Puzzle seeds which cost me a fortune are being molly coddled upstairs on a windowsil.... I keep going to look at them ,to see if any little shoots are coming ...nothing yet .... exciting though isn,t it ? Good luck with yours Digitalis :)