• Enter your email address to follow this blog and receive notifications of new posts by email.

  • Upcoming Garden Events

    Sept. 30: The Nashville Herb Society presents Through the Garden Gate: A Glimpse of Edwardian England, 8 a.m. – 3 p.m. at Cheekwood Botanic Hall. Celebrate the gardens, foods and flowers that delighted Downton Abby family and friends at the turn of the 20th century. The event begins with a hearty Edwardian breakfast, followed by three speakers: Marta McDowell on Beatrix Potter’s Gardening Life; Geraldine A. Laufer on Tussie Mussie – Victorian art of expressing yourself in the language of flowers; and Terry White, The English Garden event florist . Registration includes breakfast, box lunch in the garden with music, English tea and cookies. To learn more or to register, visit www.herbsocietynashvlle.org.

    Tips & tasks – August

    Water lawns and garden beds early in the morning to allow foliage plenty of time to dry before nightfall.

    Container gardens will benefit from a light application of all-purpose fertilizer.

    If petunias have grown long and shaggy, cut them back and give them a dose of fertilizer. They should bloom again quickly.

    If squirrels and birds go after your ripe tomatoes, pick them while they are still green and allow them to turn red indoors. For best quality, don’t store fresh tomatoes in the refrigerator.

    Make sure spring-planted trees and shrubs get plenty of water during hot weather.

    Keep cutting the spent flowers of annuals so they will continue to bloom into the fall.

    To conserve soil moisture during hot weather, replenish mulch in annual and perennial beds as necessary.

    Begin planning a fall garden. Spinach, lettuces, radishes and other fall crops will mature when the weather turns cool.

    Begin clean-up of summer vegetable beds. Remove any decayed or dying foliage to prevent diseases from taking hold.

  • Categories

  • Archives

Dayflower gives gardens the blues

QUESTION: There’s a weed spreading through my perennial bed, under the trees and even growing out of a pile of stepping stones in my yard. It has small, two-petal blue flowers and long, pointed leaves. What is it? And more importantly, how can I get rid of it?

DayflowerIt sound like you are describing Asiatic dayflower, a weedy annual that grows and spreads quickly and will consume anything in its path if you allow it to proceed. It blooms summer into fall, opening its flowers in the morning (it actually has three petals; two blue and one smaller petal that’s smaller and more pale) and closing up tight by late afternoon. It reproduces from seeds dropped each year, but it also spreads vegetatively, rooting at the leaf nodes on moist soil. Common Asiatic dayflower is in the same family as spiderwort.

Dayflower grows in a variety of conditions, but really spreads aggressively in moist, shady spots. As explained in the Illinois Wildflowers database site, “At favorable sites, the Asiatic Dayflower forms colonies that can exclude other species of plants.”

Dayflower patchSo yes, you may want to try to eliminate dayflower from your garden. It won’t be easy. Glyphosates (Roundup and other non-selective herbicides) don’t faze it, apparently. Gardeners who have struggled with it say that it’s easy to pull out of the ground, but even if you think you’ve gotten every single leaf, stem and root, it likely will come back. It’s easiest to pull up when it’s young and small. Diligence is advised.

Here are some comments I read in a forum at Dave’s Garden as I researched Commelina communis:

“It seems to grow several inches over night and can overwhelm an area in little time.”
“Invasive as they get — one of my biggest pests!”

“This plant is a superweed!”

But let’s end with a couple of good things to know about Asiatic dayflower and its blue blooms: Usually, flowers we call “blue” are closer to violet or purple. The flowers of Asiatic dayflower are truly blue, a color that is found in few other plants. And a commenter at the Dave’s Garden forum says this: “It is extremely invasive; but at least it is edible. The young leaves and stems can be added to salads or boiled for 10 minutes and served with butter.”

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: