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ISA Certified Arborists Know Trees

Arborists work with the big trees.

Arborists are horticulturists. They just happen to be more specialized than most. Many or most other horticulturists work with flora that they engage from the ground. Arborists work exclusively with trees. Some must leave the ground to do so. The most experienced and educated arborists are those certified by the International Society of Arboriculture or ISA. 

ISA certification requires an arborist to pass an examination of arboricultural proficiency. Continued participation with ISA endorsed classes, workshops or seminars is necessary to maintain certification afterward. Arboricultural industries are demanding, with stringent professional standards. Certification with such industries is correspondingly demanding.

General information about the International Society of Arboriculture is available online at isa-arbor.com. This site, although designed for arboricultural professionals, is informative also for those who must procure the services of an arborist. The directory of ISA certified arborists can identify local arborists, as well as the tree services with which they affiliate.

Although arboriculture is pertinent throughout the year, it seems to become more so with the first storms of autumn. Some trees prefer dormant pruning during winter. Others might perform best after summer pruning. Various trees have various preferences. Regardless, the need for arboriculture becomes apparent as weather breaks limbs and uproots trees.

Trees are innately the most substantial and relatively permanent plants in home gardens and landscapes. Unlike annuals and some perennials, trees are not disposable, or easy to remove if they become too problematic. Many eventually get too big for those who are not experienced arborists to engage. That is why too many trees need professional help. 

Many municipalities require permits for the removal of significant trees. Inspection by ISA certified arborists, and associated reports, are generally prerequisites for the issuance of these removal permits. Some municipalities are more protective of trees than others. ISA certified arborists try to be familiar with the ordinances of the various municipalities in which they work.

Posted on by tonytomeo

Neither Here Nor There

As I mentioned earlier, the seasons do change here, albeit mildly, on the West Coast of California.

tonytomeo's avatarTony Tomeo

P81103KIs it coming or going? Autumn that is. It normally gets here last. We are typically only beginning to see the first foliar color of autumn while other parts of America get their first snow. We typically get a few more tomatoes out of our vegetable gardens long after most everyone else has pulled out their frosted tomato plants.
Well, we still got it. Tomatoes that is. The plant that produces these bright orange cherry tomatoes is looking a bit tired and pale, but the tomatoes are as good as ever. It probably will not last until frost. The plant might get pulled out when the tomatoes run out. Without bloom, that could be pretty soon. Frost does not happen until well into winter. Regardless, tired tomato plants say that autumn is coming.
We got foliar color too. This Japanese maple turned this nice garnet red quite some time ago…

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Trees Hate Cars

This is some non-horticultural trivia. Have other arborists made similar observations?

tonytomeo's avatarTony Tomeo

P71028That is a myth. They do not hate all cars. They just hate particular cars.
I did an internship with arborists in the summer of 1988, and have never been able to get away from arboriculture. Even as a nurseryman, I still sometimes work for arborists, and inspect trees that they are concerned with. I have seen many of their subject trees that have fallen onto parked cars, homes and whatever trees fall onto. I have noticed particular patterns.
Trees are more careful with Buick, Oldsmobile, Pontiac, Chrysler, Volkswagen, Mercedes Benz, and Datsun or Nissan. I have seen them put considerable effort into avoiding these cars when dropping limbs or falling over. When I was in school in San Luis Obispo, I drove my neighbor’s 1969 Oldsmobile Cutlass out from under his Chinese elm that fell over it. The tree held itself up on limbs that landed on the opposite…

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Six on Saturday: Happy Beginning

Vermin, weeds and insects can be major problems. Gophers continue to inflict serious damage within the landscapes here. The predators who help with other vermin would get gophers too, if only they were more accessible. However, it could be significantly worse. Some weeds are actually pretty. The worst insect damage was neither serious nor prominent. Deer just glare at me as if wondering why I glare at them.

1. Gophers are the most destructive of the wildlife here. This was a new and perfect hedge of variegated Pittosporum tobira before the gophers got in. The spacing of its plants was impeccable.

2. Perennial pea should have finished blooming a while ago. It typically gets crispy during the warm and arid weather of summer. It is an annoying albeit pretty weed in some of the landscape.

3. Katydids chewed my roses last summer. Fortunately, the damage was not serious, and only affected my own roses that are not within the landscapes. This one seems to be in the family way.

4. Deer have potential to cause major damage to the landscapes, but never have. Their nibbling is minimal. No one knows why. They are a significant problem within adjacent neighborhoods.

5. Predatory birds ‘control’ some of the rabbits and other vermin, but not gophers. I do not know who this bird is, but would guess that it could take off with Bambi if she nibbles the camellias.

6. RAIN! This is the happy ending of the Fire Season, as well as the happy beginning of the Rainy Season! The first storm of the season is always major news here, but is rarely this significant. The flashing blue light on the windshield of one of the pickups is a motion activated security system that began chirping in response to so much water falling from the perforated gutter above.

This is the link for Six on Saturday, for anyone else who would like to participate:

https://thepropagatorblog.wordpress.com/2017/09/18/six-on-saturday-a-participant-guide/
Posted on by tonytomeo · 4 Comments

Valley Oak

Valley oak is the grandest of oaks.

From the north end of the Sacramento Valley to the San Fernando Valley, the valley oak, Quercus lobata, is among the most familiar and distinctive of native oaks. It is the largest oak of North America, reaching more than a hundred feet tall with trunks as wide as ten feet, which is why it is rare in urban gardens. The hundred fifty foot tall ‘Henley Oak’ of Covelo is the tallest hardwood tree in North America. The oldest trees are about six centuries old.

The two or three inch long leaves have deep and round lobes. The foliage turns only dingy yellow and then brown in autumn, and can be messy as it continues to fall through early winter, particularly since the trees have such big canopies. The gnarly limbs are strikingly sculptural while bare through the rest of winter. The gray bark is evenly furrowed.

Incidentally, Oakland, Thousand Oaks, Paso Robles and various other communities within their range are named for valley oaks. (‘Roble’ is the Spanish name.)

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Collect Fallen Leaves Before Winter

Fallen leaves can clog drainage.

The problem with all the colorful foliage that adorns so many of the deciduous trees in autumn is that it does not stay in the trees too long. Combined with all the other less colorful deciduous foliage, as well as whatever evergreen foliage happens to fall this time of year, it will become quite a mess by winter. Rainy and windy winter weather will only make it messier by bringing down even more foliage!

Contrary to popular belief, many evergreen trees are just as messy as deciduous trees are. Instead of dropping all their foliage in autumn or winter, most evergreens drop smaller volumes of foliage throughout the year. The mess is less obvious since it sneaks up slowly, but can accumulate over a few months. Only a few evergreen trees drop much of their foliage in more obvious seasonal phases.

Debris from evergreen trees is actually more likely to be a problem for plants below. Pines, cypresses, firs, spruces, cedars, eucalypti and many other evergreen trees produce natural herbicides that inhibit the emergence of seedlings of plants that would compete with them in the wild. In landscape situations, this unfortunately interferes with lawns, ground covers and annuals. Besides walnuts and deciduous oaks, not many deciduous trees use this tactic.

Regardless, any foliar debris can be a problem if allowed to accumulate too long. Large leaves, like those of sycamore, can accumulate and shade lawn, ground cover and some dense shrubbery, and can eventually cause mildew and rot. Finely textured foliage, like that of jacaranda or silk tree, can sift through most ground covers to the soil below, but can still make a mess on lawn.

Before rainy weather, debris should be cleaned from gutters and downspouts. Because some foliage continues to fall through winter, gutters will likely need to be cleaned again later. Flat roofs and awkward spots that collect debris, such as behind chimneys, should also be cleaned.

Gutters at the street are more visible and accessible, so do not often accumulate enough debris to be a problem, but may need to be cleaned if they become clogged with debris washed in by the earliest rains. Fallen leaves should be raked from pavement so that it does not get dangerously slippery, or stain concrete too much.

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Horridculture – All Hallows’ Eve

Gads! It is my least favorite Holiday!

tonytomeo's avatarTony Tomeo

P81031All Saints’ Day is November 1. As the name implies, it is a feast day that honors all Saints. It is one of the most important Holy Days of the Catholic Church. Yet, not many of us know about it.
We are much more familiar with the day before, which had been known as All Hollows’ Eve, and is now known simply as Halloween. Although some of the associated traditions are fun for children, Halloween has become an excuse for people to dress up in costumes, party, ruin perfectly good pumpkins, and behave stupidly. What an unsaintly way to celebrate, just prior to the day designated to honor all Saints!
Saint Patrick’s Day is no better. People dress up in green, party, exchange disposable potted shamrocks, and behave stupidly, all on a day that had been designated to honor a Saint whom they know very little about, and care even…

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White Alder

White alder is a sporadic native.

After a forest fire, white alder, Alnus rhombifolia, might be the first trees to regenerate into freshly deforested riparian situations. It grows quickly to exploit such an opportunity, and temporarily dominate a recovering ecosystem. Individual trees do not live for much more than half a century though. Then, they relinquish area to slower but more enduring trees.

Years ago, white alders did the same in new landscapes that needed shade. They grew fast to provide shade while preferable trees matured slowly. They subordinated and then vacated their landscapes as the preferred trees grew. Unfortunately, this technique is not so practical within municipalities that require but rarely grant permits for removal of trees. 

Although native, white alder is not prominent everywhere within its natural range. It might seem to be rare in Southern California, with only a few sporadic trees to provide seed for regeneration after a fire. Farther north, large and sustained colonies resist encroachment of other trees. Mature white alders can get forty to eighty feet tall, or taller where crowded by taller trees.

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Gutters Collect Falling Autumn Leaves

Fall color will soon fill gutters.

Autumn is also fall for a reason. It is the season during which most deciduous foliage will fall. Some deciduous trees that lack good fall color may look neater without their shabby old foliage. Sadly though, the splendidly colorful deciduous trees must shed also. All that collective debris that succumbs to weather and gravity gets messy, and can clog gutters.

Evergreen plants shed too. They are just sneakier about it. Some shed old foliage during spring or summer while simultaneously replacing it to stay evergreen. Some shed slowly but steadily for several months, rather than concentrating the mess within a brief season. Many shed during autumn though, as wind and rain dislodge their lingering older foliage. 

Whether deciduous or evergreen, various plants shed at various rates. Monterey cypress shed so steadily through the year that they are never caught in the act. Fruitless mulberry can defoliate in just a few days if frosted suddenly enough. Sudden defoliation seems to be messier, but can be an advantage. For example, gutters may need cleaning just once. 

Weather is also variable. Rain began a bit early this year. The associated dampness can accelerate defoliation for some species. Other species respond more to temperature. An early chill may accelerate their shedding. It is therefore impossible to predict when it will be necessary to rake fallen leaves or clean gutters. There are simply too many variables. 

Unfortunately, the weather that causes leaves to fall is the very same weather that makes raking and cleaning gutters so unpleasant. No one wants to work in the garden while it is cold. Nor does anyone want to get onto a dangerously wet roof to clean gutters. There is no need to rake or clean gutters before rain and cool weather cause debris to fall though. 

It should be obvious when it is necessary to rake leaves from lawn, pavement and street gutters. Bigger leaves tend to be more problematic by clogging drainage. Smaller leaves may just as easily stain pavement or decking though. Roof gutters are not so visible, but probably need cleaning while raking is necessary nearby, and hopefully before clogging. 

Posted on by tonytomeo

KinderGarden

Since this article posted three years ago, I have been through this old neighborhood a few times. Much of it is barely recognizable. However, it is amazing how familiar some of it is.

tonytomeo's avatarTony Tomeo

P81028

By modern standards, the public schools that I attended in the early 1970s would be considered to be bleak and primitive. The building were utilitarian and simple, from about twenty years earlier. The landscaping was comparably simple, with a big lawn and proportionately big shade trees. A screen of alternating Monterey pine and Monterey cypress was hedged on the southern half of the eastern boundary of the schoolyard. The only deviants to the simplicity were a few significantly older trees on the northern half of the eastern boundary of the school yard. There were two coastal redwoods, a Canary Island date palm, a cedar, and a spruce of some sort. They were all quite mature, and were likely remnants from an old farmhouse that was there before. Perhaps they wanted us to be aware that everything changes.
On the way to kindergarten, back when children were allowed to walk to…

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