I added a simple and affordable DIY heater to my greenhouse and saw nighttime temperatures rise by up to 9°F (about 5°C). Using a few candles and an unglazed clay pot, this setup creates just enough warmth to protect plants from frost—no electricity needed! It’s a great low-tech solution for cold nights, especially when combined with bubble wrap insulation to retain heat while letting in sunlight. Perfect for extending your growing season on a budget.
