Keeping Tomatoes Fresh with Wood Ash Wood ash works as a natural preservative: it absorbs moisture, limits air circulation, and protects against rot and pests. It also keeps tomatoes from touching each other, which reduces spoilage. No fridge, power, or chemicals neededjust ash, a box, and a cool dry place. What Youll Need Firm, ripe tomatoes without cracks or spots Dry, clean wood ash from untreated wood A sturdy container or cardboard box A dark, cool, dry storage spot Steps 1. Wipe tomatoes clean, but dont wash with water. 2. Add a layer of ash 12 inches to the bottom of the container. 3. Place tomatoes stem side up, not touching. 4. Cover completely with more ash. 5. Repeat layers if needed, finishing with ash on top. 6. Store in a pantry, cellar, or cupboard. How Long They Last Usually 24 months, sometimes up to 5. Tomatoes stay firm and keep their fresh taste. Extra Tips Check regularly and replace ash if damp. Remove any spoiled fruit immediately.