Bonsai conifer?

These have appeared in among the early miniature iris bulbs.  Five tiny conifers.  Might they have come from a charming supermarket miniature conifer bought for GGM Christmas 2015 - thought to be Chamaecyparis thyoides?  Top Point?  We may have recycled the compost from the miniature conifers (though unlikely given how small the pots were) and it has taken 3 years for seeds to germinate, not that we can remember flowers on the conifers - or maybe the gli''er that was sprayed on the trees has germinated.......