Without sufficient silica levels, a plant’s body is weak. The stalk droops and the flowers are puny, while leaves are yellow, curling and prone to falling off their stems.
Silica also acts as your plants’ immune system. Just like a mammal’s white blood cells rush to an injury or infection site to fight off invading pathogens, accumulated silica in a plant’s body creates a barrier around its cells that makes it more difficult for pathogens to penetrate. And for pests that bite down on stem and leaf surfaces to suck crops dry, a protective
silica barrier makes it a lot more difficult to latch on.