What are the characteristics of grass that can predict the weather?

Perennial plants thatch and zoysia can also predict the weather. When water foam appears at the junction of the leaves and stems of thatch, or when mold clusters appear at the intersection of leaves and stems of zoysia grass, it indicates that rainy days are coming.

Thus, there are proverbs such as "If the petioles of thatch foam, you will have to work in the rain tomorrow" and "Zoysia grass will grow mold, and it will rain on a cloudy day." Water chestnuts growing on the surface of lakes and ponds can also predict sunny and rainy days. A farmer's proverb says: "When water chestnuts sink in water, there will be wind and rain." This is because before rainy days come, the temperature rises, the air pressure drops, the sediments at the bottom of lakes and ponds ferment, the generated methane escapes, and water bubbles continue to appear on the water surface. , the sludge and debris from the bottom of the water rise up and stick to the water chestnut blades, causing the water chestnut disk to increase in weight and sink.