Posted on by tonytomeo

Selection of Appropriate Trees

Many trees get too big for many situations. Trees should be proportionate to their spaces.

Japanese maples are among my least favorite of trees. There; I said it! Even though I can not think of any single species of tree that has so many distinct and fascinating cultivars, I am bothered by how Japanese maples have been denigrated by their own overuse. That which is naturally an understory tree (lives in the partial shade of larger trees), which should be thoughtfully selected for its individual form, texture and color, to function as a focal point specimen tree, has become too common and misused.

Every tree should be thoughtfully selected for its particular application. The ultimate size, shape, shade, potential mess, cultural requirements, root characteristics and foliar characteristics (evergreen or deciduous) all need to be considered. Japanese maples are certainly appropriate for certain applications, but not every application. The same goes for London plane, crape myrtle, Chinese pistache and any overused tree.

Crape myrtles and Japanese maples are popular partly because they do not get too big, and are proportionate to small spaces. However, they do not get big enough for other situations. Although a silver maple will not fit into an atrium as well as a Japanese maple would, it is a much better shade tree for a big lawn. Italian cypress can actually get taller, but its very narrow shape makes a minimal shadow. Monterey cypress gets broader, but the shade is too dark for lawn.  

Unfortunately, there is no such thing as a perfect tree. Jacaranda is of moderate size, has a good shape, and makes medium shade, but is quite messy, particularly over pavement. Silk tree is both messy and has aggressive roots that can break pavement, but just like jacaranda, it looks great and is not a problem surrounded by ground cover. Both are deciduous, so allow warming sunshine through in winter. An evergreen tree that would be better to obscure an unwanted view should not get so large that it also blocks a desirable view for a neighbor.

Palm trees are very different from all other trees in that they have no branches, only leaves. As they grow out of reach, they will need to be groomed by professional arborists. Palms only grow upward, and can not be pruned around utility cables. They will need to be removed if their trunks get too close to high voltage cables.

I certainly do not intend to convince anyone to not plant any trees. I merely want people to consider the variables involved with the selection of trees that are appropriate to each particular application. Trees are long term commitments. Problems caused by improper selection can be difficult or impossible to correct later.

Posted on by tonytomeo

More Palm Silliness

Mexican fan palm, Washingtonia robusta

Mexican fan palm, Washingtonia robusta, is the most familiar palm throughout most of California. It is most typically groomed to remove deteriorated leaves without removing the associated toughly fibrous petiole bases that form a neat lattice-like sweater of stubble around its trunks. Some are groomed to also remove the stubble, leaving a clean shaven and leaner looking trunk. Some are shaven only part way up, with a sweater higher up. Without grooming, or if grooming discontinues, some accumulate beards of deteriorated leaves. Although generally harmless, such beards are combustible and can be infested with rats. On rare occasion, they become dislodged from their trunks and fall. They are dangerously heavy and very messy. This silly looking Mexican fan palm was groomed part way up, and then neglected long enough to accumulate a significant beard. The beard then fell, leaving the bare trunk exposed. Only the few lowest of the old leaves remain below where the beard was. A new beard is now forming above.

Queen palm, Arecastrum romanzoffianum, was an uncommon palm until it suddenly became very popular and almost too common through the 1990s. By that time, selective breeding produced the standardized modern variety, which is a bit greener, fluffier and more vigorous than most old specimens. Although it is a bit more genetically conformative than old specimens, it still exhibits genetic variability. Unless some are cloned by tissue culture, all are grown from seed. Some grow slower, so stay shorter. Some develop unusually plump trunks. Some are unusually floppy. This one is just weird. Its foliar canopy is so strictly narrow that it resembles the locally rare Andean wax palm, Ceroxylon quindiuense. Perhaps it actually is an Andean wax palm! A pindo palm, Butia capitata, lives in the associated front garden, and it is not exactly common.

queen palm, Arecastrum romanzoffianum or Andean wax palm, Ceroxylon quindiuense or something else?
Posted on by tonytomeo · 2 Comments

Palm Ignorance

Bismarckia nobilis

Many years ago and before I started writing my gardening column in response to all the horticultural misinformation that I had been observing in the San Jose Mercury News, I heard some of the most idiotic commentary I have ever heard about palms on the radio. I do not remember what radio station it was broadcast from, but it was likely in San Jose. The commentator was expressing his disapproval of the many mature palms that were being incorporated into public landscapes there at the time. He started by stating that, “There are two kinds of palms . . . ” Well, that certainly got my attention. He continued to say, ” . . . the tall skinny kind and the short fat kind.” Wow, I can not forget a comment like that. I knew that he was referring to Mexican fan palm and Canary Island date palm, which were and probably still are the most common palms in San Jose. Also, they were the two species that were so commonly installed into public landscapes at the time. There was no mention of queen palm, windmill palm, Mediterranean fan palm or California fan palm, all of which also inhabit San Jose. Since then, queen palm and the formerly rare pygmy date palm have become more common than they had been. Hesper palm remains rare. I brought three distinct species of bamboo palm from Los Angeles, and would like to bring a few more of the palms that perform well there, even if they do not perform so well here. I happen to be fond of the few types of king palm. I very much want to procure Bismarck palm like this one. Although still uncommon in Los Angeles, it is not completely rare. No one knows how well it performs here because no one has tried it yet.

Posted on by tonytomeo · 13 Comments

Six on Saturday: Palm Springs

Palms spring up anywhere they want to. Only the fourth and sixth of my Six on Saturday are not feral. Incidentally, the last three are not my pictures; and Brent sent the last two. His curbside Mexican fan palm is at least one of the parents of my pair of seedlings here.

1. Washingtonia robusta, Mexican fan palm, which I wrote about earlier, was too pretty to stay in the recovery nursery where no one can see it. We put it here temporarily, until a pup from the Agave ovatifolia, whale’s tongue agave that bloomed and died here, gets large enough to replace it. It is canned within the big pot for ‘efficient’ removal, but is so heavy that I have no idea of how to get the can out of its pot. It will be a bit heavier later.

2. Wicked spines on its petioles contribute to the difficulty of relocating this heavy palm.

3. Trachycarpus fortunei, windmill palm is also too pretty to stay unseen in the nursery. It will also get groomed and relocated temporarily to a landscape next week. This young palm grew in the garden of the mother of childhood friends, so I am very protective of it.

4. Palms and redwoods do not mix well. A colleague wants this windmill palm gone. It is about twenty four feet tall. That ladder is eight feet tall. It will be difficult to relocate, but I do not want it cut down and killed. Like the others, I have no idea of what to do with it.

5. Brent’s curbside Mexican fan palm looks embarrassed with its silly uplighting. That is the moon above. This palm, which is a Memorial Tree for Brent’s brother, was about ten feet tall when relocated here because it grew under electrical cables several blocks away.

6. Bedford Drive, nearer to the original location of Brent’s curbside Mexican fan palm, is flanked by very old and alternating Mexican fan palms and Phoenix canariensis, Canary Island date palms. They were grandly uniform until the Canary Island date palms began to succumb to pink rot during the 1980s. The Beverly Hillbillies started their shows with a scene of their arrival in town on a similarly flanked street three blocks to the northeast.

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 · 5 Comments

No Bad Habit

Washingtonia robusta, Mexican fan palm

Technically, this one is different. I did not get it from a situation that it needed to be removed from at work, and then can it because I did not want it to be discarded. I did not grow it from seed or cutting that I ‘borrowed’ from a landscape somewhere else. I did not ‘borrow’ it from Brent’s gardens at the Jungalow. I did not find it for free on Craigslist.

I found it for free on the Marketplace of Facebook, which is NOT Craigslist or any other familiar source. Therefore, technically, it is not a bad habit.

It is a Mexican fan palm, Washingtonia robusta. It was too appealing to ignore. I noticed its post several days ago, but did not respond immediately. I thought that someone else would claim it if I ignored it long enough. No one claimed it; so it is here now. Actually though, I am very pleased with it.

It came from the Willow Glen neighborhood of San Jose, so is accustomed to excellent soil and climate. Its species is remarkably adaptable though. It will be as satisfied with the slightly cooler climate and sandier soil here. I will need to provide it with plenty of water while it disperses its new roots. It is only canned now because the situation that it will be installed into is not yet ready for it. A few deteriorating black locusts and box elders will need to be pruned or removed first.

As it recovers from transplant, the presently healthy leaves will likely desiccate and need to be pruned away. I will leave them until they do so because they may not, and they help to sustain new root growth and dispersion. The process is actually less stressful through the cool and rainy season of winter.

Posted on by tonytomeo · 4 Comments

Analysis

There is so much more to this picture than the kitty.

As Brent mentioned when he sent me this picture, which was included with my ‘Six on Saturday’ post earlier this morning, “There’s a lot going on in the picture.”

Slightly above the exact center of the picture, to the left of the tip of the kitty’s right ear, a Mexican fan palm peeks through a small void in the vegetation. It is at the curb of a home on the west side of the next street to the east. It is what Brent would have taken a picture of if he had zoomed in as intended. It leans to the right and south, as tall Mexican fan palms do there in response the the Santa Ana Winds.

The foliage of the queen palm above and to the left demonstrates that the Santa Ana Winds were blowing when the picture was taken.

The trunk that extends upward through another smaller void in the vegetation below the queen palm foliage is of another Mexican fan palm at the curb in front of Brent’s Jungalow. It is in alignment with the other Mexican fan palm to the east. Its canopy is obscured by that of the queen palm.

The foliage above and to the right of the primary Mexican fan palm, but below and to the right of the queen palm, is pink trumpet tree, which blooms spectacularly bright pink for spring.

The defoliated thicket of stems below and to the left of the primary Mexican fan palm is a large plumeria, which Brent, while very young, acquired from an elderly neighbor. He got it at about the same age that I was when I acquired my Dalmatian iris and rhubarb. More than a dozen other plumeria grow and bloom in a row that extends parallel to the walkway, in front of and behind the large specimen that is visible.

The somewhat yellowish foliage below and to the left of the plumeria is an impressively large Mexican lime that is somehow productive within all that shade.

The strange foliage that hangs outwardly from a dark central mass above and to the left of the Mexican lime, and left of the queen palm is a large colony of staghorn fern that is much closer to the window. Some sort of weird begonia foliage is below and to the left of it. California sycamore foliage is above it.

The top of a tall Indian laurel hedge is visible to the upper right of the picture. Some sort of odd dracaena and odd fern are visible to the lower left corner. Much but not all of the remaining vegetation is a mixture of understory palms, including various bamboo palms, Raphis palms and kentia palms. The spiral stairs lead to an upper deck, which has a splendid view of the rest of the garden that extends to the left, beyond the view of this picture. Finally, on the spiral stairs, is this kitty.

Posted on by tonytomeo

Unhappy Fishtail Palm

Now that the foliar color has improved, the foliar density is deteriorating.

Fishtail palm is never completely happy here. It is not much happier in Southern California. Even the happiest are discolored to a minor degree. Many are more significantly discolored. Some are so very discolored that they are visually unappealing.

No one seems to know why. I suspect that they would prefer more humidity. Perhaps they prefer more humid warmth. They may dislike the pH of the soil.

Furthermore, fishtail palms are monocarpic. Each trunk dies after bloom. Clumping sorts develop new trunks prior to the demise of a blooming trunk. Those that do not develop replacement trunks die completely.

The illustration above is obviously not of exemplary quality. I took it from the car while driving. This was on northbound Highway 101, at the northern extremity of Pismo Beach. The palm to the upper left of the sign for Spyglass Pointe, with the yellow arrow pointing at it from above, is a fishtail palm. Until recently, it had been famously chlorotic.

Colleagues who drove through Pismo Beach typically asked me about this palm after seeing how chlorotic it typically had been. This it he least chlorotic that I have ever seen it. However, it may be naturally deteriorating after its primary bloom. Although I have not observed any bloom, I can see that new leaves are not developing on the same rate that They had in the past. This picture shows it with only a single open leaf, with another foliar spike extending from the terminal bud.

This particular fishtail palm is not very old. I can remember when the associated residential buildings were constructed less than two decades ago. landscapes and associated trees were added shortly afterward. Since then, the fishtail palm had been unhappy. This likely why fishtail palm is not more commonly available here than it is.

Posted on by tonytomeo

King Palm

King palm prefers frostless climates of Southern California.

Where it grows wild in rain forests of eastern Australia, the piccabeen or bangalow palm, Archontophoenix cunninghamiana, is a strikingly elegant tree that gets to about fifty feet tall on a clean, slender trunk. The six to ten foot long feather fronds (pinnate leaves) form a light but distinctive canopy about ten to fifteen feet broad. Smooth green petioles (leaf stalks) encase the upper few feet of crownshaft, eventually peeling away cleanly to reveal the smooth trunk as it grows below. A juvenile king palm does not bloom, but eventually flaunts adulthood with softly pendulous ‘graduation’ tassels of profuse but tiny purple tinged white flowers.

Locally, this palm is known more commonly as the king palm, and does best as a large houseplant or where it is protected from frost. Outdoors, it seem to be happiest close to the San Francisco Bay where it is somewhat insulated by all the water, but can unfortunately get smacked about by the wind there. A mature tree is somewhat more tolerant to frost than a young tree is, but can be damaged or even killed if it gets cold enough.

King palm fortunately does well in the partial shade of larger adjacent trees or buildings that might shelter it from frost. However, it can not be pruned down for clearance from higher trees, ceilings or any other overhead obstruction (including utility cables), so should be planted where it has plenty of room to grow vertically, or where no one will mind it getting removed when it gets too tall after many years.

Unlike most other palms, king palm does not transplant easily when mature. It has no problem getting planted from a pot to a larger tub or planter, or into the ground. Once in the ground though, it is there to stay.

Posted on by tonytomeo

Canary Island Date Palm

Canary Island date palm is the boldest of the common palms here.

The biggest and boldest of the common palms is the Canary Island date palm, Phoenix canariensis, which can get more than sixty feet tall and nearly forty feet wide, with a full canopy of gracefully arching deep green fronds. A young tree actually spends the first many years as a shrubby plant while the base of the trunk develops. Fronds get longer and spread broader every year until the trunk gets big enough to elongate. Vertical growth then accelerates somewhat, but the canopy gets no broader.

Most trees are female, eventually producing ornately orange but messy clusters of inedible dates. Male trees eventually get a bit taller, but are not quite as graceful and bloom with unimpressive dusty tan flowers.

Old deteriorating fronds need to be pruned away close to the trunk. Petiole bases of the most recently removed fronds are often carved into ‘pineapples’ to leave a bit of support directly below the canopy. Removed fronds leave a distinctive pattern on the trunk.

Posted on by tonytomeo

Palms Are A Californian Tradition

Mexican fan palm might still be the most common palm here, but is not native.

Only a few of the  many different palms that can be grown locally are actually common. The Canary island date palm and the Mexican fan palm, which had historically been the most common palms, have unfortunately given palms a bad reputation. Both get too large for small gardens, and need costly maintenance when they grow out of reach.

Since the late 1980s, the formerly uncommon queen palm has become the most common palm. Although it too eventually grows beyond reach, it is still more proportionate to home gardens while young. It has a relatively narrow trunk that is partially ‘self-cleaning’ (which means that old fronds, or leaves, often fall off or can be easily peeled off).

The windmill palm and the Mediterranean fan palm, although no more common now than a century ago, are two of the better palms for home gardens, since they do not get too large, and are somewhat easy to maintain. The Mediterranean fan palm has several sculptural trunks that curve out randomly from the base. Sharp teeth on their petioles make pruning a challenge, but not impossible.

The windmill palm has a straight solitary trunk that is distinctively hairy where old fronds get pruned away. It eventually grows out of reach, but takes many years to do so. By that time, many people allow beards of old fronds to accumulate on the trunks overhead instead of bothering to keep them pruned.

The desert fan palm, which is the only palm that is native to California, is very similar to the Mexican fan palm, but is about twice as stout and half as tall, with a fluffier canopy. Because it grows slower and stays smaller, it would be a better palm for urban gardens, except that it does not like to be watered regularly when mature. It really prefers warmer and drier climates.

Pindo palm and Mexican blue palm would also be great palms for urban gardens, but grow rather slowly before getting big enough to get noticed. In some climates, pindo palm produces strange and messy, but sweet and tasty fruit. Mexican blue palm is one of the most resilient palms, and blooms with really cool long floral tassels that a can drag on the ground from short trees.

‘Feather’ palms, like Canary Island date palm, queen palm and pindo palm, have pinnate (and generally compound) leaves, with small leaflets arranged on solitary midribs. Their fronds must be removed as they deteriorate.

‘Fan’ palms, like Mexican fan palm, Desert fan palm and windmill palm, have palmate leaves, centered around the distal termini of solitary petioles. These are most often pruned away, leaving distinctive patterns of petiole bases, but can alternatively be left to accumulate into thick beards of thatch.

Mexican fan palms are sometimes ‘shaven’ of their petiole bases to expose elegant lean trunks, although the procedure is intensive and expensive. Desert fan palms and some Mexican fan palms drop their own beards naturally.