Two problems came together in my home veggie garden last weekend. One, the area in the back of the garden we expanded into two years ago is still not developed; all we've done is put down cardboard in anticipation of some sheet-composting action happening this fall. Two, I had extra winter squash seedlings, over-enthusiastically grown for the demo garden where there's no place for them.
Solution (I hope): bought four bags of Leafgro, laid them out well-spaced on top of the cardboard, slit holes in each, and planted the seedlings.
Will keep you updated!