How do plants predict the weather?

Flowers know sunny and rainy days, and vegetation reports the weather. Perennial plants such as thatch and Zoysia can also predict the weather. When the leaves and stems of thatched grass bubble at the joint, or Zoysia japonica has moldy hairs at the joint of leaves and stems, it indicates that rainy days are coming. Therefore, there are "thatched petioles vomit, it will rain and work tomorrow" and "Zoysia grass grows mildew, and it rains on cloudy days." Proverbs

Water chestnut, which grows on the surface of lake and pond, can also forecast sunny and rainy days. An agricultural proverb says, "When the water chestnut sinks, there will be wind and rain." This is because before the rainy day, the temperature rises, the air pressure decreases, the sediments at the bottom of the lake ferment, the generated biogas escapes, the bubbles on the water surface continue, the sludge and debris at the bottom of the water rise and stick to the leaves of water chestnut, which makes the weight of water chestnut plate increase and sink.