Arbor Day is January 18, 2019

Four people planting a tree

Tree planting in Mary Esther

The best time to plant a tree is twenty years ago. The second best time is for Arbor Day. Florida recognizes the event on the third Friday in January, but planting any time before spring will establish a tree quickly.  Arbor Day is an annual observance that celebrates the role of trees in our lives and promotes tree planting and care. As a formal holiday, it was first observed on April 10, 1872 in the state of Nebraska. Today, every state and many countries join in the recognition of trees impact on people and the environment.  Trees are the longest living organisms on the planet and one of the earth’s greatest natural resources. They keep our air supply clean, reduce noise pollution, improve water quality, help prevent erosion, provide food and building materials, create shade, and help make our landscapes look beautiful. A single tree produces approximately 260 pounds of oxygen per year. That means two mature trees can supply enough oxygen annually to support a family of four.  The idea for Arbor Day in the U.S. began with Julius Sterling Morton. In 1854 he moved from Detroit to the area that is now the state of Nebraska. J. Sterling Morton was a journalist and nature lover who noticed that there were virtually no trees in Nebraska. He wrote and spoke about environmental stewardship and encouraged everyone to plant trees. Morton emphasized that trees were needed to act as windbreaks, to stabilize the soil, to provide shade, as well as, fuel and building materials for the early pioneers to prosper in the developing state.  In 1872, The State Board of Agriculture accepted a resolution by J. Sterling Morton “to set aside one day to plant trees, both forest and fruit.” On April 10, 1872 one million trees were planted in Nebraska in honor of the first Arbor Day. Shortly after the 1872 observance, several other states passed legislation to observe Arbor Day. By 1920, 45 states and territories celebrated Arbor Day. Richard Nixon proclaimed the last Friday in April as National Arbor Day during his presidency in 1970.  Today, all 50 states in the U.S. have official Arbor Day, usually at a time of year that has the correct climatological conditions for planting trees. For Florida, the ideal tree planting time is January, so Florida’s Arbor Day is celebrated on the third Friday of the month. Similar events are observed throughout the world. In Israel it is the Tu B Shevat (New Year for Trees). Germany has Tag des Baumes. Japan and Korea celebrate an entire week in April. Even, Iceland one of the most treeless countries in the world observes Student’s Afforestation Day.  The trees planted on Arbor Day show a concern for future generations. The simple act of planting a tree represents a belief that the tree will grow and some day provide wood products, wildlife habitat erosion control, shelter from wind and sun, beauty, and inspiration for ourselves and our children.

Child hugging a wooded ploe in a garden

Trees provide us with benefits including serving as a sound barrier, stormwater abatement, and of course fresh air and oxygen

“It is well that you should celebrate your Arbor Day thoughtfully, for within your lifetime the nation’s need of trees will become serious. We of an older generation can get along with what we have, though with growing hardship; but in your full manhood and womanhood you will want what nature once so bountifully supplied and man so thoughtlessly destroyed; and because of that want you will reproach us, not for what we have used, but for what we have wasted.”

~Theodore Roosevelt, 1907 Arbor Day Message

 

 

Native Evergreen Christmas Trees to Rebuild the Panhandle

Native Evergreen Christmas Trees to Rebuild the Panhandle

Pyramid shaped conifer treeThroughout history the evergreen tree has been a symbol of life. “Not only green when summer’s here, but also when it’s cold and dreary” as the Christmas carol “O Tannenbaum” says. After such devastating tree losses in the Panhandle this year, this winter is a prime time for installing more native evergreens.

While supporting the cut Christmas tree industry does create jobs and puts money into local economics, every few years considering adding to the urban forest by purchasing a living tree. Native evergreen trees such as Redcedar make a nice Christmas tree that can be planted following the holidays. The dense growth and attractive foliage make Redcedar a favorite for windbreaks, screens and wildlife cover. The heavy berry production provides a favorite food source for migrating Cedar Waxwing birds. Its high salt-tolerance makes it ideal for coastal locations. Their natural pyramidal-shape creates the traditional Christmas tree form, but can be easily pruned as a street tree.

Two species, Juniperus virginiana and Juniperus silicicola are native to Northwest Florida. Many botanists do not separate the two, but as they mature, Juniperus silicicola takes on a softer, more informal look. For those interested in creating a different look, maybe a Holly (Ilex,sp.) or Magnolia with full-to-the-ground branches could be your Christmas tree.

When planning for using a live Christmas tree there are a few things to consider. The tree needs sunlight, so restrict its inside time to less than a week. Make sure there is a catch basin for water under the tree, but never allow water to remain in the tray and don’t add fertilizer. Locate your tree in the coolest part of the room and away from heating ducts and fireplaces. After Christmas, install the new tree in an open, sunny part of the yard. After a few years you will be able to admire the living fence with all the wonderful memories of many years of holiday celebrations. Don’t forget to watch for the Cedar Waxwings in the Redcedar.Brownish-gray bird with yellow belly and black eye streak perched on a branch

Fall Color Without Popcorn Trees

Fall Color Without Popcorn Trees

As the trees begin to turn various shades of red, many people begin to inquire about the Popcorn trees. While their autumn coloration is one of the reasons they were introduced to the Florida environment, it took years for us to realize what a menace Popcorn trees have become. Triadica sebifera, the Chinese tallowtree or Popcorn tree, was introduced to Charleston, South Carolina in the late 1700s for oil production and use in making candles, earning it another common name, the Candleberry tree. Since then, it has spread to every coastal state from North Carolina to Texas, and inland to Arkansas. In Florida it occurs as far south as Tampa. It is most likely to spread to wildlands adjacent to or downstream from areas landscaped with Triadica sebifera, displacing other native plant species in those habitats. Therefore, Chinese tallowtree was listed as a noxious weed by the Florida Department of Agriculture and Consumer Services Noxious Weed List (5b-57.007 FAC) in 1998, which means that possession with the intent to sell, transport, or plant is illegal in the state of Florida. The common name of Florida Aspen is sometimes used to market Popcorn tree in mail-order ads. Remember it’s still the same plant.

Although Florida is not known for the brilliant fall color enjoyed by other northern and western states, we do have a number of trees that provide some fall color for our North Florida landscapes. Red maple, Acer rubrum, provides brilliant red, orange and sometimes yellow leaves. The native Florida maple, Acer floridum, displays a combination of bright yellow and orange color during fall.  And there are many Trident and Japanese maples that provide striking fall color.  Another excellent native tree is Blackgum, Nyssa sylvatica. This tree is a little slow in its growth rate but can eventually grow to seventy-five feet in height. It provides the earliest show of red to deep purple fall foliage. Others include Persimmon, Diospyros virginiana, Sumac, Rhus spp. and Sweetgum, Liquidambar styraciflua. In cultivated trees that pose no threat to native ecosystems, Crape myrtle, Lagerstroemia spp. offers varying degrees of orange, red and yellow in its leaves before they fall. There are many cultivars – some that grow several feet to others that reach nearly thirty feet in height. Also, Chinese pistache, Pistacia chinensis, can deliver a brilliant orange display.

                                                                  Young Trident maple with fall foliage. Photo credit: Larry Williams

There are a number of dependable oaks for fall color, too. Shumardi, Southern Red and Turkey are a few to consider. These oaks have dark green deeply lobed leaves during summer turning vivid red to orange in fall. Turkey oak holds onto its leaves all winter as they turn to brown and are pushed off by new spring growth. Our native Yellow poplar, Liriodendron tulipifera, and hickories, Carya spp., provide bright yellow fall foliage. And it’s difficult to find a more crisp yellow than fallen Ginkgo, Ginkgo biloba, leaves. These trees represent just a few choices for fall color. Including one or several of these trees in your landscape, rather than allowing the Popcorn trees to grow, will enhance the season while protecting the ecosystem from invasive plant pests.

For more information on Chinese tallowtree, removal techniques and native alternative trees go to: http://edis.ifas.ufl.edu/ag148.

 

Silent Night It Is Not!!! Cicadas Sing the Evening Away.

Silent Night It Is Not!!! Cicadas Sing the Evening Away.

cicada shell

Only a shell of its former self, the exoskeleton shed by a cicada is all that remains of the previous night’s long pursuits.

Autumn evenings in the panhandle are usually beginning to reflect the official change of seasons with cooler air and a slight lessening of the raucous din created by insects and birds. The recent early-fall hurricanes have brought the area a wide breath of hot, humid air, delaying the long anticipated start of relief from the sultry summer environment.

Anyone hearty enough to take an early evening walk in north Florida will experience a continuation of the frenetic activity and riotous sounds typical to summer in the south. The near deafening call of cicadas (Magicicada spp.) is part of the cacophony.

Once commonly identified as locust in the region, their near-mechanical buzzing originates from the protection of foliage in trees and bushes during the day or twilight hours. During the dark hours they sing often and relocate frequently.

It is important to note cicadas are not the locust of infamy which shred the green, lush landscapes and foretells famine. While locust and cicadas are both insects, the similarities end there.

These seldom seen or captured insects known for their boisterous, sometimes undulating, chorus do leave strategically placed souvenirs for the sharp-eyed observer. This discarded residue of their early life stages is a highly valued tool for many elementary school boys with a prank in mind. The hard shell is harmless, but under the right conditions does have a certain shock value appreciated by juvenile miscreants.

Their nymph stage skeletons are often seen on the trunks of trees, shrubs stalks and even the siding of buildings. The opaque brown shells are abandoned when the cicada outgrows it and then emerges to form a new exterior.

The process is similar in other insect species with an exoskeleton having very limited potential for growth and expansion. The rigid coating provides this creature an armored surface to fend off the challenges of being small and small in a big hungry world.

In some states, cicadas are famous for their periodic appearance in colossal numbers, sometimes as many as 1.5 million per acre. These once every 13 to 17 year swarms do not occur in Florida which has an insect friendly environment.

The 19 Florida cicada species fall into three groups based on overall size measured by the length of the forewings. They produce their songs with timbals, paired drum-like structures on the sides of the abdominal segments.

A muscle attached to the timbal plate causes the timbal ribs to pop inward and project outward when relaxed. Flexed rapidly, the cicada chorus can deliver hours of uninterrupted night music.

In Florida, only males have timbals and the females are mute. Most sounds made by males are calling songs which serve to attract the silent females.

Cicada nymphs live in underground burrows where they feed on xylem sap from roots of grasses or woody plants. Because xylem sap is low in nutrients, complete nymph development takes several years to successfully mature.

All cicada species molt four times underground. When the cicada nymph is ready for its fifth and final molt it makes its way to the soil’s surface. It climbs a short distance up a tree trunk or stem, anchors itself and molts for the last time becoming an adult.

If male, the new cicada will add its contribution to the nightly festivities. If female, she will quietly wait for that special, one in a million, nocturnal crooner.

To learn more about north Florida’s noisy night insects, contact the local UF/IFAS County Extension Office. Click here for contact information.

Tree Triage: Deciding how to deal with downed and damaged trees after a storm

Tree Triage: Deciding how to deal with downed and damaged trees after a storm

Large trees can cause serious damage in a storm, but it is important to salvage as many as surviving trees as possible. Photo credit: Carrie Stevenson

It has been more than two weeks since devastating Hurricane Michael landed hard on the coast of Florida. Central-Panhandle counties from the Gulf to the Alabama line are in full recovery mode, struggling to return to normal after many days without power and clean water. A strong category 4 hurricane, Michael brought sustained winds of 155 mph, with gusts likely much higher—many instruments that measured wind speed failed and blew away with the onslaught of the storm.

Unfortunately, with winds this strong, trees of every shape and description blew down, bringing with them serious damage to homes, vehicles, and power lines. In the immediate aftermath of a storm, it is important to perform “tree triage” using the same method as emergency room personnel as they decide which patients to treat first, based on urgency.

Hazard trees causing or leading to unsafe conditions should be given priority. These would be limbs and trunks on top of houses, power lines, blocking roads, or leaning in precarious situations that could blow down on people or property. Once roads are cleared and dangerous trees and limbs are removed, homeowners can move their attention to downed trees that are lying out of harm’s way or leaning away from property.

It is important to remember that many injuries from hurricanes happen after a storm—often when physically and emotionally exhausted storm victims are using heavy machinery at elevated heights. Always be willing to ask for help, whether from volunteers, neighbors, or landscape professionals. Use proper safety precautions when utilizing chainsaws, ladders, tractors, and other machinery.

On a more positive note, many trees can be salvaged after a storm. In particular, younger, newly planted trees can often be righted or pruned and still grow to maturity. Don’t fall into the trap of clearing every tree from your property—healthy or not—out of fear. Trees are extraordinarily valuable, and particularly with all of the tree loss it is more important than ever to save as many trees as you can. These trees will provide much-needed shade, oxygen, air and stormwater filtration, and wildlife habitat. Learn the names of your trees that survived or had less damage, and plant more of those after recovery. Many long-lived species like magnolia, live oak, and cypress can weather storms better than other species.

It is important to continue monitoring any surviving trees for damage. Many trees, particularly pines, can be susceptible to disease, insect damage, and fungus after a storm and it may be several months before the damage is fully evident. After Hurricane Ivan, many pine forests and individual trees that survived the storm were lost to pine bark beetles within the following year.

For detailed information on tree assessment and making wise decisions, the IFAS Trees and Hurricanes publication has great photos and examples. Be sure to check it out and contact your local county Extension office if you have questions.

Plant Them High and Water Well

Plant Them High and Water Well

We plant trees with the intention of them being there long after we are gone. However, many trees and shrubs fail before ever reaching maturity.  Often this is due to improper installation and establishment.  Research has shown that there are techniques to improve survivability.  Before digging the hole:

  1. Look up. If there is a wire, security light, or building nearby that could interfere with proper development as it grows, plant elsewhere.
  2. Dig a shallow planting hole as wide as possible. Shallow is better than deep! Many people plant trees too deep. A hole about one-and-one-half the diameter of the width of the root ball is recommended. Wider holes should be used for compacted soil and wet sites. In most instances, the depth of the hole should be LESS than the height of the root ball, especially in compacted or wet soil. If the hole was inadvertently dug too deep, add soil and compact it firmly with your foot. .
  3. Find the point where the top-most root emerges from the trunk. If this is buried in the root ball then remove enough soil from the top so the point where the top-most root emerges from the trunk is at the surface. Burlap on top of the ball may have to be removed to locate the top root.
  4. Slide the plant carefully into the planting hole. To avoid damage when setting a large tree in the hole, lift the tree with straps or rope around the root ball, not by the trunk. Special strapping mechanisms need to be constructed to carefully lift trees out of large containers.
  5. Position the plant where the top-most root emerges from the trunk slightly above the landscape soil surface. It is better to plant a little high than to plant it too deep. Remove most of the soil and roots from on top of the root flare and any growing around the trunk or circling the root ball. Once the root flare is at the appropriate depth, pack soil around the root ball to stabilize it. Soil amendments are usually of no benefit. The soil removed from the hole and from on top of the root ball makes the best backfill unless the soil is terrible or contaminated. Insert a square-tipped balling shovel into the root ball tangent to the trunk to remove the entire outside periphery. This removes all circling and descending roots on the outside edge of the root ball.
  6. Straighten the plant in the hole. Before you begin backfilling have someone view the plant from two directions perpendicular to each other to confirm that it is straight. Break up compacted soil in a large area around the plant provides the newly emerging roots room to expand into loose soil. This will hasten root growth translating into quicker establishment  Fill in with some more backfill soil to secure the plant in the upright position.
  7. Remove synthetic materials from around trunk and root ball. Synthetic burlap needs to be completely removed from the root ball; treated burlap can be left in place. String, strapping, plastic, and other materials that will not decompose and must be removed from the trunk at planting. Remove the wire above the soil surface from wire baskets before backfilling.
  8. Apply a 3-inch-layer of mulch.  To retain moisture and suppress weeds cover the outer half of the root ball with an organic mulch. Do not cover the stem of the plant or the connecting root flare.
  9. Water consistently until established. For nursery stock less than 2-inches in caliper, this will require every other day for 2 months, followed by weekly 3-4 months.  At each irrigation, apply 2 to 3 gallons of water per inch trunk caliper directly over the root ball. Never add irrigation if the ground is saturated.