How can I successfully cultivate garden giant mushrooms using spawn?

To successfully cultivate garden giant mushrooms using spawn, you need to prepare a suitable growing medium, such as compost or straw, and inoculate it with mushroom spawn. Keep the growing environment warm, humid, and well-ventilated, and ensure the mushrooms receive adequate light. Regularly water the growing medium and monitor for pests or diseases. Harvest the mushrooms when they reach the desired size for best results.