Grow Year-Round with a Walipini: How to Build an Underground Greenhouse
In colder or variable climates, gardening year-round might seem impossible. But with an underground greenhouse—also known as a walipini—you can harness the Earth’s thermal mass to keep your plants growing through all seasons. By digging down 8–10 feet and building a slanted-roof structure with proper insulation and airflow, you create a naturally regulated environment. With less need for heating, your garden becomes more energy-efficient and sustainable. Whether you’re growing greens in Montana or tomatoes in New England, a well-maintained walipini can yield fresh produce all year long.
🇺🇸 Main Takeaways (Formatted for American audience):
- Thermal Consistency: Ground-level temperatures stay stable—ideal for growing cold-sensitive crops.
- DIY-Friendly: Most materials—like reclaimed wood, polycarbonate panels, and earthbags—are affordable and accessible.
- Best Orientation: South-facing in the U.S. and Canada to catch the most sunlight.
- Climate-Ready: Protects from wind, snow, and frost.
- Bonus Efficiency: Add water barrels inside to store solar heat and release it overnight.
