by Rita Lynn
back in the 16th century, wealthy European landowners had their groundskeepers create three-dimensional gardens from plants and flowers. Now called “mosaiculture,” this type of living sculpture uses mostly annuals and flowers, and sometimes perennials, in the process of creating two- or three-dimensional works of art. Use of the multiple individual plants distinguishes mosiaculture from topiary, in which a single plant - usually a shrub - is pruned to a specific shape.
In mosaiculture, large sculptures and other hefty pieces that are to be raised off the ground require a welded steel framework. Drip irrigation systems are usually installed once the basic structure has been constructed. The skeleton is then filled with the growing medium. Some use a mixture of peat and soil, and others combine clay, straw and manure. The whole work is then covered with netting. Such major sculptures can be years in the making and can weigh thousands of pounds.
Much like creating a pattern with mosaic tiles, designers then use plants of various hues, textures, and sizes to achieve the desired effect. Plugs of individual plants are inserted into the soil medium by poking holes in the netting. Larger pieces use a staggering number of plants. Even a modest ten-foot square can include up to 1,500 plants. Finally, once the sculpture is on display, it has to be pruned and maintained, sometimes being watered several times a day, to retain its original appearance.
Some of the most spectacular displays of mosaiculture are contests sponsored by the Mosaicultures Internationales of Montreal. These exhibitions take place every three years in Montreal and other selected cities throughout the world. For an idea of the enormity, complexity, and beauty of these works, take a look at www.boredpanda.com/plant-sculptures-montreal-international-mosaicultures-2013/ . You’ll be amazed!
Are you inclined to try this at home? You could start with a small skeleton shaped of chicken wire or a similar firm but moldable mesh material. A drip irrigation system could be installed at this time. Next, fill the sculpted shape with your soil mixture, packing it firmly. Finally, wrap the entire piece with netting. Then, for the living surface, use plants with colored foliage for most of the design. Consider sedums, grasses and ground covers. When available, native plants are a good choice, because they have the best tolerance to our climate. Flowering annuals can also be used, but be sure to choose varieties that will retain their size and color throughout the life of the sculpture. After the plants have been added, you can put sphagnum moss around them. The moss will not only cover empty spaces, but it will also help retain moisture. Once finished and on display, check at least daily to be sure all parts of your figure have enough water, and prune it as needed - every week or so - to maintain its appearance.
Whether or not you’re industrious enough to try your own sculpture, be sure to visit our Arboretum to see the beautiful peacock mosiaculture. Although not quite on the scale of the pieces created for international competition, it is nevertheless a wonderful work of art and a great gift to those who see it.
“Mosaiculture... More Than Just Topiary, They’re Living Sculptures,” www.theuntappedsource.com/blog/mosaiculture-more-than-just-topiary-they’re-living-sculptures
“Mother Earth, in Plants,” www.ballpublishing.com/GrowerTalks/ViewArticle.aspx?articleID=20209&highlights=september+2013
“About Mosaiculture,” http://mosaiculturesinternationales.com/en/about/
“Behind the Scenes: Mosiaculture: a complex, meticulous art,” http://mosaiculturesinternationales.com/en/categories
“In Montreal, Marvels of Green Sculpture,” www.nytimes.com/2003/08/24/travel/24adv.html
“Amazing Plant Sculptures at the Montreal Mosaiculture Exhibition 3013,” www.boredpanda.com/plant-sculptures-montreal-international-mosaicultures-2013/
“A Creative Expression: Mosaiculture,”
“Imaginary Worlds: A New Kingdom of Plant Giants,” www.atlantabotanicalgarden.org/events-classes/events/imaginary-worlds
By Rita Lynn
The Arboretum is honoring zinnias this year. If you joined in the spring, you even received a package of zinnia seeds. These flowers have been in our gardens for generations. They’re so common that many people, even those who aren’t gardeners, recognize them by name. Because they’re so common, you might by-pass them in your spring purchases in favor of more exotic species. This could be a mistake considering all that they have to offer.
Surprisingly, the native variety of zinnias the Spaniards first encountered in Mexico was unattractive enough that they named them “mal de ojos,” or “sickness of the eye.” Surely, we would be very unlikely to call the beautiful zinnias we have today anything so disparaging. Their present name honors the German botanist Johann G. Zinn, who wrote the first description of the plant in the 18th century. Although 20 species have since been identified, most of our present day varieties have been developed from the species Zinnia elegans. A notable handful of others have been developed from the species Z. angustifolia and Z. haageana.
Knowledge of the characteristics and needs of these garden stand-bys is helpful in choosing the variety you plant. In general, zinnias available from the Z. elegans cultivars come in the widest variety of colors, many flower forms and a full range of sizes. However, they are the most susceptible to powdery mildew. They also require dead-heading to maintain flower production. On the other hand, narrow leaf zinnias – those developed from Z. angustifolia – are highly resistant to powdery mildew and require little dead-heading. Look for the Crystal, Profusion, and Star series that are in this category. Finally, Z. haageana, or Haage’s zinnias, are also mildew resistant but do require some dead-heading. Persian Carpet varieties are from this group.
Most likely, zinnias’ popularity comes at least partly because they are so easy to grow. The seeds are relatively large, making them good candidates for handling even by children. You can direct sow the seeds into the garden when the soil and air temperatures have warmed, or, for a head start, you can start the seeds indoors 6-8 weeks before the last frost. Be aware, however, that zinnias don’t fare well in being transplanted, so you would want to put the seeds in peat pots that can be set directly into the ground without disturbing the seedling roots. Then, within 8 to 12 weeks, you should be enjoying your flowers.
Zinnias prefer full sun and a well-drained soil. When you plant them, be sure that you follow spacing recommendations. Good air circulation around the plants is the best way to reduce the likelihood that the plants will suffer from powdery mildew and other diseases. Drip irrigation, as opposed to wetting the leaves by watering from above, is recommended for the same reason. By way of insect damage, zinnias are susceptible to aphid, thrip, stem miner and caterpillar infestation. Again, good cultural practices are the best deterrent. Healthier plants are more resistant to pest damage.
For cut flower displays, whether you want a large, stunning, long-stemmed flower in a vase, you prefer a bunch of small blossoms in a cup, or you want a colorful mixed bouquet, zinnias can fill the bill. In fresh flower arrangements, zinnias will last a week or more. Zinnias can also be dried for everlasting bouquets and wreaths. Double-flowered varieties are best suited for this purpose, because they hold their shape best. You can dry them by harvesting them when they are at their peak, removing the leaves, and hanging them upside down out of direct light. You can also replace the stems with wire and use one of a variety of drying media.
I don’t know about you, but considering the ease of cultivation, the range of color, size and form, and their desirability in both outdoor and indoor displays, I’m ready to take another look at what’s available in zinnia seeds and plants next year. Meanwhile, let’s relish this year’s zinnia display at the Arboretum.
“Year of the Zinnia,” http://ngb.org/year_of/index.cfm?Yoid=8
By Paul Kammerdiner
Reading has always been and continues to be one of my favorite pastimes, as a result I read everything and I mean everything! I even reads signs in places like the Arboretum. Have you taken the time to stop and read the informational signs here? We have brown signs for directions, black signs for identification of trees and plants, and we have green signs to just tell you about neat stuff. These green signs are aimed at education and there are several of them lined up along the path in the Arrival Garden where you begin your journey through the grounds.
This one is at the end of the path where it turns uphill and is an introduction to an important individual, closely related to many of the concepts we stand for.
For those that come to this place to relax and enjoy trees, flowers, and the attractions of a green space; the question; why is it here? may not enter into the thought process. It may not even for those of us who work to bring this place to life. However, places like this exist because of ideas and philosophies of others that have gone before. When we think of pioneers in conservation, ecological thought, and preservation of the natural world; names like John Muir, Rachel Carson and John James Audubon come to mind. Ranked right up there with them is one of Iowa’s native sons; Aldo Leopold.
Rand Aldo Leopold was born in Burlington, Iowa January 11, 1887; the "Rand" was eventually dropped. His house overlooked the Mississippi River. Aldo Leopold's early life was highlighted by the outdoors. His Father would take the children on excursions into the woods and taught his oldest son woodcraft and hunting. Aldo showed an aptitude for observation, spending hours counting and cataloging birds near his home. A sister, Mar,y would later say of her older brother, "He was very much an outdoorsman, even in his extreme youth. He was always out climbing around the bluffs, or going down to the river, or going across the river into the woods”. Aldo decided at an early age that forestry was to be his vocation. So when in 1900 Gifford Pinchot who oversaw the newly implemented Division of Forestry in the Department of Agriculture, donated money to Yale University to begin one of the nation's first forestry schools Aldo determined to attend. In order to be accepted to Yale, his parents agreed to let him attend a prep school in New Jersey. He arrived at his new school in January 1904, shortly before he turned seventeen. He was considered an attentive student, although he was again drawn to the outdoors and Leopold spent much time mapping the area and studying its wildlife. Leopold studied at the prep school for a year, during which time he was accepted to Yale. Because the Yale Forest School granted only graduate degrees, he first enrolled in Sheffield Scientific School's preparatory forestry courses for his undergraduate studies.
Upon leaving Harvard he embarked on his career of choice and in 1909, Leopold was assigned to the Forest Service's District 3 in the Arizona and New Mexico territories.
In 1911, he was transferred to the Carson National Forest in northern New Mexico. Leopold's career, which kept him in New Mexico until 1924, included developing the first comprehensive management plan for the Grand Canyon, writing the Forest Service's first game and fish handbook, and proposing Gila Wilderness Area, the first national wilderness area in the Forest Service system.
On April 5, 1923, he was elected as an Associate Member of the Boone and Crockett Club a wildlife conservation organization founded by Theodore Roosevelt and George Bird Grinell.
In 1924, he accepted transfer to the U.S. Forest Products Laboratory in Madison, Wisconsin and became an associate director. In 1933, he was appointed Professor of Game Management in the Agricultural Economics Department at the University of Wisconsin Madison the first such professorship of wildlife management. Leopold lived in a modest two-story home close to the campus with his wife and children. Today, Leopold's home is an official landmark of the city of Madison.
He purchased eighty acres in the sand country of central Wisconsin. The once-forested region had been logged, swept by repeated fires, overgrazed by dairy cows, and left barren. There he put his theories to work in the field and eventually wrote his best-selling A Sand County Almanac (1949), finished just prior to his death. Leopold died of a heart attack while battling a wild fire on a neighbor's property.
Aldo Leopold was a true pioneer as well as a gifted writer; he developed a unique perspective on what it means to manage the wonders of our natural surroundings. He taught that even in the midst of development we needed to preserve at least some portion of the wilderness and to restore as much as we can to its original state. One of his most famous concepts was the land ethic quoted below:
“The land ethic simply enlarges the boundaries of the community to include soils,
waters, plants, and animals, or collectively: the land... In short, a land ethic changes the role of Homo sapiens from conqueror of the land-community to plain member and citizen of it. It implies
respect for his fellow-members, and also respect for the community as such.”
I like to believe that the Arboretum is an example of our commitment to the land. Even though the Cedar Valley is still somewhat rural, we are seeing more and more development and encroachment on the natural beauty of our surroundings. Here, however, we promise a tranquil oasis in the midst of the concrete jungle. A place to learn and to enjoy being outside. By planting trees and restoring habitat, we provide a place for wildlife to thrive as well as an opportunity for all to learn about what our little corner of the world looked like before we got here. Come join us and as you wander the grounds and pause to rest on one of the wooden benches; you might like to know that the design of the bench came from none other than Aldo Leopold.
All information in this article was taken from http://en.wikipedia.org/wiki/Aldo_Leopold
In this month of March, when Irish heritage is celebrated, we frequently see plants for sale called "shamrocks", but are they?
What is a shamrock? The term comes from the Gaelic word "seamrog" which means
The early Celtic peoples considered shamrocks as a charm against evil spirits, and this pagan tradition was adapted by Christian missionaries to represent the symbol of the Trinity. It is now an emblem of Ireland.
There are many species of clover, even just in Ireland. In 1893, botanist Nathaniel Colgan published a study in the Irish Naturalist. He wrote: "I was induced...to take into hands once more the inquiry into the species of our national badge..." He sent requests to many of the Gaelic speaking counties for specimens of the original shamrock "certified as genuine by competent authorities." He also received roots from Trinity College Botanic Garden, and in Dublin from "three different itinerant vendors, each of whom was required to exercise the most scrupulous care in the selection of the genuine plant from the obviously miscellaneous collection in her basket." Botanist Colgan planted the 35 specimens he received, which grew into 4 different varieties of clover, but the "decided preponderance" grew into Trifolium repens, otherwise known as white or Dutch clove, which is the clover variety that Iowans most commonly see in their yards. Today, it still appears in Ireland that more than one type of clover may be sold as "shamrocks".
So what are we seeing in local stores this month? These are usually species of Oxalis, which is the largest genus in the wood-sorrel family. There are over 800 species of Oxalis, and they are most abundant in the Southern Hemisphere. The leaves of most Oxalis have three leaflets, and are shamrock like in appearance. Some leaves and flowers are light sensitive and tend to close up at night.
Oxalis regnelli, which is a South African native, is frequently sold in March labeled as a "shamrock". It has the bright green leaves, which close in evening, and bright white flowers.
Oxalis triangularis is another common species, with purple leaves which have a rose pattern, and pink flowers.
Both of these Oxalis have fleshy, rhizomatous bulbs, and can be easily transplanted outside to enjoy all summer. They prefer semi-shade and rich soil, and would need to be potted prior to fall frost to assure survival. They are easy to grow indoors in good light, and can cheerfully bloom all winter. You don't need to luck of the Irish to be successful with Oxalis!
by La Rae Randall
At the beginning of February, my husband and I traveled to the beautiful country of Mexico for our honeymoon. During this trip, we stayed in Cancun and traveled to the ancient Mayan city Chichen Itza as well as the last Mayan city Tulum. During our wonderful week-there, we experienced not only spectacular weather (84° and sunny the entire time!), but also the beautiful flowers and plants of the Yucatan Peninsula.
The Yucatan Peninsula was once completely jungle. With such a lush environment for growing, it’s easy to understand why it fosters such interesting plants! Of course, all flora is adapted to the host climate; to survive in the jungles of Mexico, plants must love heat, humidity, and being near water.
One prominent native plant that is seen throughout Mexico is Agave. Agave, a succulent, has thick, waxy leaves that hold water in them. Every part of the Agave plant is edible and was once a major food source for the Mayan people. And, as many know, this plant (specifically, Blue Agave) is used to make tequila, which can only be legally made in Mexico.
Cordyline (above) is a palm-like plant that is native to tropical climates. It has a striking appearance as its magenta color is unusual for a plant. We saw the cordyline everywhere we went!
This flower is called Bougainvillea. It is an extremely hardy and versatile plant that can be seen in many different colors. I mostly saw this flower in pink and red, as show (sorry about the blurry photo!).
Here are a few other photos just in case you’d like to pretend it’s 84°.
"Agave." Better Homes & Gardens. N.p., n.d. Web. 24 Feb. 2014.
"The International Cordyline Society." The International Cordyline Society. N.p., n.d. Web. 24 Feb. 2014.
"All About Colocasia Plants." Colocasia Plants. N.p., n.d. Web. 24 Feb. 2014.
"Bougainvillea 101." Bougainvillea Growers International. N.p., n.d. Web. 24 Feb. 2014.
by Rita Lynn
During my tour of our incredible state of Alaska last summer, I kept at least one eye open at all times to gardens and vegetation. I wanted to know what grows there, and how Alaskans use their “green thumbs." I didn't get to the coldest parts of the state, but I got as far north as Fairbanks and as far south as Sitka. My travels took me to the tundra areas of Denali National Park and to the temperate rain forests of the southeast coast. No matter where I was, the flora offered beauty and bounty.
As is the case everywhere else, weather is a big factor. In Fairbanks, the growing season in the past 20 years or so has lengthened to about 105 days, although killing frosts as late as June 5 and as early as August 19 have occurred in that same time span. Wilderness areas show the characteristics of the boreal forest. Only six species of trees - spruce, poplar, larch, birch, aspen and tamarack - survive there. In the understory you find such plants as equisetum, commonly known as woodland horsetail, and bunchberry, a dwarf dogwood. For the home gardener, starting seeds indoors in flats or buying seedlings is necessary to grow most flowers and vegetables. On the other hand, garden plants can bask under the midnight sun. Once in the ground, plants have the benefit of daylight up to 24 hours a day, allowing them to grow quickly while they have the chance, and encouraging the development of brilliant blossom color. I spent several hours at the University of Alaska Fairbanks Georgeson Botanical Garden. It was July, but peonies, among a healthy array of other flowers, were in full bloom and absolutely stunning. Other exhibits spotlighted vegetables which, with the long days, grow to phenomenal size. Informative signage noted that a cabbage grown in an area near Anchorage, for example, weighed in at 127 pounds. (That's a lot of sauerkraut!) Researchers associated with the garden are experimenting with the use of black mulch to warm the soil, allowing earlier planting and growth, thereby extending the growing season. Could such a technique be of use here in Iowa in years when spring takes its good old time, like it did last year?
Vegetation in the southeast coastal areas is affected by conditions quite different from those further north and inland. This is a temperate rainforest, so the problem isn't temperature as much as it is available sunlight. Temperatures are actually more moderate than ours in Iowa - cooler in the summer, and not as cold in the winter. With all the moisture, wilderness vegetation is lush. Forests are dominated by the Sitka spruce, Western hemlock and red alder. The understory sports such plants as ferns, blueberry and salmonberry shrubs, and the dangerously thorny devil's club. Within the cities of Juneau and Sitka I was particularly impressed with the displays of flowers. Perhaps the colors seemed more brilliant because the weather was so drab when I was there, but it was as if residents, after their long and dark winter, defy the often dreary weather by putting color in every available space. City parks were showcases of flowers, and flowers lined the sidewalks and filled people's yards. People who have vegetable gardens have best success with cooler season varieties such as lettuce, plants in the cole family, and root vegetables. Warm season crops such as tomatoes require protection and usually do not produce well, because they just can't get enough warmth and sunshine. Southeast Alaskans also harvest from the sea, incorporating seaweed and coastal plants such as beach asparagus, along with lots of fish and other plentiful seafood, into their diets.
If we moved to Alaska, our houseplants would need artificial light in the winter (as would we), and we'd have to make significant adjustments to our gardening practices. But, like the folks who live there now, if we wanted a garden, we could certainly have a bountiful one. And if we were in search of awesome natural beauty, we would find that in abundance, even though it comes in forms much different from that in Iowa.
By Rita Lynn
Early this fall, when trees were just barely starting to show color, I was walking in the woods and spotted brilliantly colored leaves on vines growing up trunks of trees. These splashes of red, orange and gold stood out in the woods and pierced an otherwise gray day with beauty. As I suspected, closer inspection revealed that the show was being put on by poison ivy.
Everyone who spends any time outdoors should be able to identify this plant because of its ability to cause uncomfortable and sometimes dangerous rashes to susceptible people. Perhaps you have heard the saying, “Leaves of three, let it be!” The plant does indeed have clusters of three leaflets, with one leaflet at the end of the leaf stalk (petiole), and the other two leaflets arising opposite each other lower on the petiole. These lower leaflets are often shaped like mittens, but in truth, the color and shape of the leaves is highly variable. Poison ivy (Toxicodendron radicans) grows in many forms, from bushy plants to vines that climb entire trees, and it is found all across the United States. Oil, technically called “urushiol,” produced by all parts of the plant and most potent in the sap, is what causes reactions in human skin.
Not everyone is sensitive to this oil. Some people haven’t been bothered by it and some get just a slight, short-lived itchy rash. Beware, however, if you haven’t ever reacted to poison ivy. Sensitivity can develop at any time, so it’s best just to avoid exposure no matter what. You can get a rash from touching any part of the plant, by being sprayed by the oil as the leaves are cut, or even by touching an object or an animal that has come in contact with the plant. Your skin absorbs the oil quickly, some say within half an hour. Therefore, washing with detergent - or even plain running water if that’s all that’s available - as soon as possible is important. Once the oil is on an object, however, it is very stable and can remain potent for as long as a year. Consequently, contaminated objects need to be carefully discarded or thoroughly cleaned.
Treatment for mild cases of poison ivy rash involves using topical medication available over-the-counter. Interesting home remedies to relieve itching from such irritations include using heat in the form of hot water or a hair dryer, applying the sap from jewelweed, or spraying with deodorant containing aluminum. In the most susceptible people, the initial rash can develop into inflamed, swollen lesions with open weeping sores that can last for two or three weeks and may require medical intervention. Even worse, people have been known to suffer from exposure to their lungs from breathing smoke when poison ivy is burned, sometimes resulting in a need for hospitalization.
If you discover poison ivy growing in your yard, eradicating it requires caution and may take some time. By no means should you burn the plants or try to pull them up your bare hands. The best time to start the elimination effort is May through July when the plants are flowering. Spraying with glyphosate (sold as Roundup and other herbicides) is the safest method, although other plants in the area might be damaged. Vines should be cut off about 6 inches above the ground and the stump treated with the glyphosate according to package directions. The plant spreads by its tough roots as well as by having its seeds dispersed by birds. Eradication may take several applications of herbicide and efforts over several seasons.
Scourge that it is to humans, animals and birds are not affected by urushiol. There is much to be said in defense of poison ivy on their behalf. Small animals, birds and insects use poison ivy for shelter, and birds then feed on the insects hidden in the vines. Mammals such as deer browse on the foliage. Perhaps most importantly, poison ivy produces grape-like clusters of white berries. Robins, grosbeaks, chickadees, finches and juncos are some of the birds that are attracted to the berries, available in fall and winter when other food is scarce. And dare we mention its function as a hardy ground cover, or that it is truly beautiful in the fall? So when you see poison ivy in the wild or even in a remote area on your property, stay away from it, but try to remember that it is a treasure to the environment and to the rest of the animal kingdom.
“Poison Ivy,” http://poison-ivy.org/html/faq.htm
“Poison Ivy,” www.fcps.edu/islandcreekes/ecology/poison_ivy.htm
“Poison Ivy,” www.gpnc.org/poison.htm
“Poison Ivy Control,” mdc.mo.gov/node/4686