The Yellow Farmhouse Garden

January 9, 2020

Boxelder trees can be a refuge for wildlife

So far this winter has been relatively mild which is good for all kinds of wildlife including birds and small and large mammals. Milder temperatures means fewer calories are needed to stay alive.

There is no deep or ice-encrusted snow to keep wildlife from getting to their food sources such as nuts, seeds, fruits, grasses, etc.

During a severe winter, wildlife can rapidly use up the fat they gained through the summer and fall. They also have to work harder to get to winter food if it is covered by a deep blanket of snow or a layer of ice.

Fortunately, there is a common native tree  that helps wildlife make it through the winter by providing food and shelter. That is the humble boxelder tree.

Boxelder trees been disdained by landscapers and arborists so much and for so long that we forget they can contribute in a positive way to the local ecosystem.

There are few reasons why boxelder are scorned. First is because of their looks. Unlike many other species of trees that grow in symmetrical, predictable shapes, boxelders tend to grow asymmetrically, mainly due to the loss of branches. To me this gives each individual boxelder tree its own personality.

Unlike slow-growing hardwood trees like the mighty oaks or maples, boxelder’s wood is brittle and weak due to its fast growth habit. Weak wood means weak branches that frequently break off during winds, storms, heavy snow or, so it sometimes seems, for no reason at all..

A boxelder in someone’s yard means having more tree debris to clean up. Plus falling branches can cause damage If the tree is near a house, shed or other structure.

But the soft wood of boxelders is beneficial to birds and mammals. Those branches that break off often leave a spot for fungus to get a foothold and start decaying wood. Since the wood is so soft, it quickly decays leaving holes and nesting cavities. Larger branches and trunks of older trees can eventually become hollowed out and provide shelter for larger mammals and birds.

Since boxelder trees are a type of maple, their seeds look  much like maple tree seeds enclosed in little  “helicopters” called samaras.

Since boxelder trees are a type of maple, their seeds look much like maple tree seeds enclosed in little “helicopters” called samaras.

Boxelder trees are often called weedy trees because they are able to sprout up just about anywhere. For example, in urban areas they’re sometimes found growing against the walls and foundations of buildings. Female boxelders produce enormous amounts of seeds that are carried by the wind and dropped randomly.

The nutritious boxelder seeds hang on the tree through winter making them easy to find by critters during harsh winters.

Even though it is a native tree, you may not want to introduce boxelders onto your property due to their aggressive growth.

On the other hand, if you already have a boxelder growing on your property and it’s in an out of the way spot, consider letting it grow so it can continue its role in your local ecosystem. When bitter winters occur in the future, your boxelder might be the difference between life and death for some of your wildlife population.

Bob

 

December 19, 2019

Native calico asters stars of fall

A fall flowering favorite of mine is our native calico aster. It is found in all eastern US states and Canadian provinces.

Around our local area, I’m seeing more of these plants than usual. The relatively rainy growing season may have something to do with it since they prefer semi-damp environments. More frequent rain means that it will be more likely they will be able to establish themselves in spots where they wouldn’t be found in drier years.

In late summer and early fall, these asters produce a display of 5/8-inch diameter, white flowers with pale yellow centers. You often find them along hiking trails, roadsides and the edge of fields. In my yard they’re popping up around my wood chip pile, an old compost heap and other places that don’t get touched by the mower that often. They range in height from about a foot to over five feet tall depending on their location and how long they have been growing there. They are perennials.

Even though they are not known for their scent, I sometimes can detect a faint sweet smell from mine if I put my nose right up against the flowers.

Calico asters are a good source of late season nectar for pollinators. I’ve noticed many honeybees and other small pollinating insects on mine. As the season progresses, the flower centers change colors as they age adding hues of pink, blue or maroon here and there, giving it a “calico” appearance.

 

Look how the colors of the center of the flowers change.

Look how the colors of the center of the flowers change.

Calico asters can be confused with other similar-looking species. However, if you look closely, you’ll notice the plant has another distinguishing characteristic, its flowers grow from only one side of the stems.

Mammals such as deer and rabbits sometimes browse on the foliage. Some species of butterflies and moths do too.

The stems are strong enough to stay standing through much of the winter adding interesting contrast to otherwise empty expanses of white snow.

These likable flowers make a great addition to a wildflower garden. Plant breeders have worked with them and have come up with improved varieties that are more tame and will look at home in your main flower garden.

Bob

 

December 12, 2019

Ground pine, a festive native plant

We have an area on our property that we let grow wild. It provides shelter for wildlife, nesting sites and materials for birds, and a home to insects and other organisms. It is also a spot where many native plants have become re-established.

One of those plants, flowering right now in the middle of December, is the festive-looking “ground pine” sometimes called “princess pine”  (Lycopodium obscurum).

OK, it’s not actually flowering per se, but instead are sporulating by sending up reproductive stalks full of spores. It is amazing to me that a plant reproduces like that this time of year in Michigan.

Ground pine is a common name for a group of species of club moss. Their leaves strongly resemble miniature evergreen trees but they only grow to about six to eight inches tall.

Looking at this close up you can see how the leaves resemble an evergreen tree.

Looking at this close up you can see how the leaves resemble an evergreen tree.

While they don’t produce pine cones, the tops of their reproductive stalks vaguely remind you of a pine cone. I tapped a few of those stalks and each one released a small cloud of fresh spores.

 The  yellow reproductive structures contain a huge amount of spores for such a small plant

The yellow reproductive structures contain a huge amount of spores for such a small plant

Ground pine stays green all year round, further reinforcing its reputation as a mini evergreen tree.

Club moss are very attractive plants and because of that, many people in the past have tried to dig them up and move them to their own gardens. Many more plants were harvested for Christmas wreaths further reducing the native population. Even more plant populations were inadvertently destroyed by land developers and farmers. As a result, all species of club moss are protected by state law in Michigan.

If left undisturbed, club moss grows into an attractive stand of plant

If left undisturbed, club moss grows into an attractive stand of plants.

Several years ago we tried cutting a few shoots to make into Christmas decorations but they very quickly wilted into a dried mess. I suspect ours is a different species than the ones harvested in other areas of the country.

I’ve been watching our stands of ground pine for many years. Over that time they have expanded and now cover a fairly good sized area.

For plant lovers, it is a treat to find ground pine, especially this time of year. It’s sort of like stumbling across a Christmas wreath that mother nature herself made for us.

Bob

 

October 3, 2019

Native calico asters are the stars of fall

A fall favorite of mine is our native calico aster. It is found in all eastern US states and Canadian provinces.

Around our local area, I’m seeing more of these plants than usual. The relatively rainy growing season may have something to do with it since they prefer semi-damp environments. More frequent rain means that it will be more likely they will be able to establish themselves in spots where they wouldn’t be found in drier years.

In late summer and early fall, these asters produce a display of 5/8-inch diameter, white flowers with pale yellow centers. You often find them along hiking trails, roadsides and the edge of fields. In my yard they’re popping up around my wood chip pile, an old compost heap and other places that don’t get touched by the mower that often. They range in height from about a foot to over five feet tall depending on their location and how long they have been growing there. They are perennials.

Even though they are not known for their scent, I sometimes can detect a faint sweet smell from mine if I put my nose right up against the flowers.

Calico asters are a good source of late season nectar for pollinators. I’ve noticed many honeybees and other small pollinating insects on mine. As the season progresses, the flower centers change colors as they age adding hues of pink, blue or maroon here and there, giving it a “calico” appearance.

 

The flowers are just starting to change colors.

The flowers are just starting to change colors.

Calico asters can be confused with other similar-looking species. However, if you look closely, you’ll notice the plant has another distinguishing characteristic, its flowers grow from only one side of the stems.

Mammals such as deer and rabbits sometimes browse on the foliage. Some species of butterflies and moths do too.

The stems are strong enough to stay standing through much of the winter adding interesting contrast to otherwise empty expanses of white snow.

These likable flowers make a great addition to a wildflower garden. Plant breeders have worked with them and have come up with improved varieties that are more tame and will look at home in your main flower garden.

Bob

 

May 16, 2019

Ornamental pear trees may become invasive in the future

Ornamental Bradford pear trees are in full flower right now. They must be everyone’s favorite tree, or you would think so because everywhere there’s a housing development there’s at least one Bradford pear tree planted in front of every house. Even municipalities and businesses are planting them.

They do have a certain charm and they’re quite eye-catching when they’re in full bloom. But there’s so many of them now that they’re beginning to just become part of the background visual-noise instead of  being an accent in the landscape.

Landscapers plant Bradfords because of their flowers, shape and moderate size, and even though they are an introduced species, they are believed to be non-invasive by many. That has been the case in Michigan until recently. There’s evidence that these trees have become tired of being well-behaved and have decided to cut loose from their suburban lawns. This was pointed out to me a couple of years ago by a local, well-respected naturalist. To drive home her point she said all you had to do was look at the number of wild Bradford pears growing all along the highways.

Well, I drove the entire length of I -275 this week and was surprised how many out of place Bradford pears there were. They weren’t overcrowding any one area but there were plenty of single trees and small clusters of them. When you’re looking for them you begin to see them everywhere.

Even though this tree was covered with flowers, no bees were around. Bees seem t prefer other kinds of flowers if given the choice.

Even though this tree was covered with flowers, no bees were around. Bees seem t prefer other kinds of flowers if given the choice.

These more boisterous, escaped trees are claiming some area for themselves and have the potential to push out the native plants. The conventional wisdom that they are sterile and unable to reproduce may be true but something is going on. It brings to mind what Jeff Goldblum’s character Ian Malcolm said in the movie Jurassic Park, “Life uh, finds a way”.

In some other states Bradford pears are already a big enough problem that they have been place on those states invasive species list and are no longer recommended for planting.

To be fair, Bradford pears may never become a problem for us. I remember early in my career when, for a short time, some people worried smoke trees might escape and become invasive. Some trees did take root out of place here and there but the smoke tree invasion never materialized.

Maybe it’s time to think about developing a replacement for the Bradford pear if for no other reason than to add more variety to the suburban landscape.

Bob

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