Worm castings are phenomenal soil improvers. The last couple of days we’ve spread out 500 litres of worm castings we bought from a local worm farmer (see Local Green Directory). We spread the castings around our fruit trees from the base of the trunk to well past the drip line.
To keep the castings nice and cool we mulched over them with the free horse manure we picked up from the stables just down the road at Kembla Grange. To get our soils really humming, we’ll spread this amount of castings out twice a year.