eupatorium coelestinum การใช้

• Hardy ageratum ( " Eupatorium coelestinum " ) and Mexican mint marigold.
• A low-growing Eupatorium coelestinum, which covers itself with pale blue flowers in August, will bloom to hard frost.
• One _ hardy ageratum ( Eupatorium coelestinum ) _ is covered with blue flowers that to a nonscientific eye look the same as those on the annual ageratum.