Monday, September 7, 2015

Bittersweet and Honeysuckle: Not so Sweet

If there's one plant that has become my nemesis, it is Oriental Bittersweet.  The scientific name is Celastrus orbiculatus, and sadly it seems to grow everywhere.  It follows me around, sneering and chuckling at me like some surly, angst ridden teenager.   Oh it knows how much it annoys me and seems to revel in it.  As a climbing vine, Bittersweet is highly effective and will twine up into trees, telephone poles, shrubs, and any stationary object.  Removal is especially difficult as it clings and winds about the victim and refuses to let go.  Other plants are smothered, power lines are pulled down, and neighborhood pets disappear.  Well, the pets know enough to stay away, but your lilacs may not be so lucky.

Chemical controls on the market work, but it takes multiple applications to fully kill the plant.  Digging out the vine by hand is possible and works quite well.  Sadly, if enough of the bright orange roots remain behind the vine will regrow.  The easiest way to get rid of Bittersweet is to pull it out before it starts climbing.  Cutting the vine at the ground will slow it down although this will require vigilance and repeated snipping.

The leaves are rounded and vary in color from light to dark green depending on growing conditions and moisture.  It grows well in sun and shade although shade does seem to slow it down some.  The flowers are small and an insignificant whitish color.  The berries, on the other hand, are quite attractive with a yellow shell that eventually cracks open to show the meaty orange flesh inside.  These berries are so colorful they often turn up in fall decorations thus assisting the plant in spreading further.  Birds readily eat the fruit and the seeds germinate at an alarming rate.  If you see Bittersweet in a fall wreath or floral arrangement please refrain from purchasing.

The fruit prior to splitting open and the rounded leaves.  This plant was found growing along the Robert Frost Trail in North Bennington, Vermont.

More leaves and berries.

Shrub honesuckle, Lonicera species of various types, is a second not so sweet invasive.  Unlike Bittersweet, this honesuckle is a shrub and it's not quite as evil.  Often planted to form a hedge or to attract birds, this plant has successfully escaped into the wild and now, like Bittersweet, appears almost everywhere.  The small flowers appear early in the spring and the rounded green or green/grey leaves appear even earlier.  Overall growth is arching in nature as stems of the plant grow upward and outward over time.  The plant prefers sunny spots but will tolerate shade.  It would prefer evenly moist soil but will also tolerate dry once it is established.  The berries it produces are red or orange depending on the species of plant.  Since the plant leafs out early in the spring, it is pretty easy to spot.  The leaf buds start out looking like small green pencils and then the leaves whorl out.

Luckily, shrub honesuckle is far, far easier to control.  Removing it by hand works quite well, especially when the plants are young.  However, even older, established plants can be hacked down and dug out successfully.  Chemical controls also work, but since removing the plants by hand works so well I've just taken a shovel to the plants instead.  Unfortunately, birds enjoy these fruits and will help spread the seeds far and wide.

Shrub honeysuckle.  Found along the Robert Frost Trail in North Bennington, Vermont.

Recommended Plants:  Asters.  The common natives include Aster novi-belgii, the New York Aster and Aster novae-angliae, the New England Aster.  There was a time when I wasn't so fond of the sometimes scruffy looking native asters.  Over time, however, I've come to enjoy their variety and their burst of late summer color.  Asters come in many shapes from the more manicured looking "Purple Dome" variety, to the tall, floppy, wild natives.  Flower colors appear in various shades of purple, pink, red, and white.  They grow best in sunny spots with well drained soil.  If too shaded, they tend to become floppy and damp locations will invite the fungus powdery mildew.  Heights range from a foot or less to upwards of three or four feet.

No comments: