Hardy Ageratum, Blue Mistflower 'Wayside'

The negative on this plant is that is spreads and therefore requires annual maintenance to keep it in check.
The positives are: lo...Read Morevely blue color late in the season; attracts butterflies; easy care. For me the positives outweigh the negatives. Probably the key to whether you would like this plant is whether it becomes invasive in your garden.

I was so excited when I found this plant. My husband and I had planted annual ageratum around our pond every spring, and this seemed to ...Read Morebe the perfect perennial substitute. Not so. Grows over 20" tall and spreads very fast. I was not successful at fully extracting these last summer but will keep trying. Although the flowers are very pretty, I must categorize this one as invasive, at least in moist soil. Sorry, but definitely not the cute annual we love.

Grows like a mint. I pull up by the roots each fall and still have plenty in my front garden. Yes, it is pretty in the fall, but it is ...Read Morevery invasive.

EUPATORIUM coelestinum Wayside - Hardy Ageratum - Short 15" - Plant 20" apart. zone 3-8. All the pluses of annual Ageratum, but truly per...Read Moreennial. Provides good blue color in late summer and early fall.

General Information:
A perfect alternative to annual Ageratum. Tolerates a moist site; late to wake up in the spring.