You can purchase from local worm suppliers. Generally, compost worms can be bought from community gardens, nurseries, worm farmers, or home hardware stores. There are also worm suppliers online. \r\rIt is safe for worms to be mailed. They're typically fine in transit for 4 to 5 days with no hardship.\r\rTiger worms or Red worm (Eisenia foetida) and the Indian blue worm (Perionyx excqvatus) are the best worms for Subpod. \r\rYou CANNOT use worms from your garden; these are earthworms and have different taste buds than compost worms. Compost worms have evolved to eat rotting plant matter.