Be sure to watch for Praying Mantis egg sacs when doing your spring garden cleanup! Praying Mantis are beneficial insects. They eat the bad guys and help to keep our gardens pesticide free. When the weather warms, 150 to 250 babies will hatch from this sac. Our native Praying Mantis are brown and grow to about 3 inches long. The Chinese Mantis are green and grow much larger. Some grow so large they have been known to eat a hummingbird. We discovered his sac when harvesting our Pussywillow. It is now in our greenhouse where it will soon be joined by several thousand ladybugs. Spring Open House May 4, 5 and 6!