Soil Solarization: A Low-Cost Way to Sterilize Soil

To kill weeds, pathogens, and pests in garden soil without chemicals, solarization uses the sun’s heat.

Process

1. Cultivate and smooth the area.
2. Water thoroughly.
3. Cover with clear UV-stabilized plastic (1–2 mil).
4. Seal edges with soil to trap heat.
5. Leave for 4–6 weeks during the hottest part of summer.

After Solarization

Remove plastic, lightly cultivate, and plant. Beneficial microbes will recolonize quickly. This method works best in full sun and warm climates.