Unfortunately, I don't have any place that's cool enough to keep a container of red wiggle worms for making worm compost.
On one of my visits to Crop Production Services in Kahului, they recommended Black Gold Earthworm Castings. I'm so pleased with the results - I've been using it predominately as an amendment for container grown salad greens. In fact I want to credit this product with my surprisingly good results growing micro-greens in July.
I've been purchasing Black Gold Earthworm Castings Blend from Crop Production Services. They sell commercial and organic ag products and at very competitive prices.