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There Are Rules To Hedging

Few plants are conducive to shearing

All the wrong plants get shorn. Mow, blow and go gardeners are known for shearing everything that they can reach into creepy and unnaturally geometric shapes, usually flared out at the top, and bulging obtrusively into otherwise usable space. Yet, functional formally shorn hedges are passe and almost never shorn properly.

First of all, a formal hedge should be uniform, which means that all the plants that comprise it should be the same, and planted at the same distance from each other. Any plants within a formal hedge that die should be replaced with the same plant. A single English boxwood plant added to a Japanese boxwood hedge will always stand out with a different shade of green and growth pattern. Seedlings of other plants that grow up into a hedge should be removed before they become part of it.

Secondly, a formal hedge should be contained within defined boundaries. It should get neither too tall, nor too deep (from front to back). A fat hedge wastes space. There is no excuse for a hedge to encroach obtrusively over walkways, driveways or patios.

The vertical faces of a hedge should be completely vertical or slope very slightly inward at the top, but should certainly not slope outward to shade lower growth. A slight inward slope is more important on a northern face of plants that are sensitive to shade.

Hand pruning hedges (with hand shears) produces the best finish, but takes quite a bit of time for big hedges. Shearing with typical hedge shears cuts leaves as well as stems, so can cause foliage with large leaves to look a bit tattered for a while. Hedges that grow fast may need to be shorn twice or more annually. Some hedges can get shorn back aggressively once annually, and then allowed to fluff out evenly through the rest of the year. Bottlebrush and escallonia hedges can bloom nicely and evenly if shorn only once annually.

Glossy and wax leaf privet are among the most traditional of formal hedges. Glossy privet can get quite tall, but wax leaf privet actually has glossier foliage. Photinia and shiny xylosma have a bit more color, but want a bit more space (from front to back). Boxwoods make very nice small hedges. Pittosporums are available in various shapes and sizes. Pittosporum eugenioides gets quite tall, and can be kept quite lean. Pittosporum tobira is shorter and wider.

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Drunk Stick

Again, these recycled articles are deficient in those that conform to the ‘Horridculture’ meme for Wednesday. This one is just weird.

tonytomeo's avatarTony Tomeo

P80516Seriously, I am not making this up. ‘Drunk Stick’ is what the Spanish name of ‘palo borracho’ translates into. It is one of the few common names of the tree I know only as floss silk tree, Chorisia speciosa or Ceiba speciosa. Yes, it sounds crazy, but not as crazy as what the trunk and limbs looks like. One can speculate why it is known as ‘drunk stick’. I am not certain that I want to know.

The trunk in the picture is that of a small tree still in a #5 can. Larger trunks are no better. They are fat and green, and outfitted with these weird conical thorns. The thorns are not too terribly sharp like those of hawthorns or cacti, but they are terribly stout. Seriously! They are like made of wood! As the green trunk grows, it becomes distended, but only makes more thorns to…

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Jupiter’s beard

Jupiter’s beard tolerates only minor shade.

It is rare in nurseries, but common in and near old gardens. Jupiter’s beard, Centranthus ruber, was popular at least a century ago, and is now naturalized. It migrates so liberally, and transplants so easily, that there should be no need to purchase it. Those who grow it in established colonies may be happy to share. Specific cultivars can be elusive though.

Bloom is typically pinkish red, but can be brick red, purplish red, purplish pink, pale pink, or white. Individual flowers are tiny, but abundant, in rather dense and somewhat conical trusses. Bloom begins in spring and becomes more profuse until warm summer weather. A cool situation can inhibit primary bloom, but promote sporadic bloom through summer.

Jupiter’s beard prefers sunny exposure. Although a bit of shade can preserve foliar color and extend sporadic bloom through summer warmth, it compromises profusion of bloom. The slightly rubbery evergreen foliage of bloomed stems deteriorates slowly. Removal of older stems after bloom eliminates shabby growth, and also promotes fresh new growth.

Posted on by tonytomeo · 29 Comments

In A Vase On Monday: Bad Habit

The small bouquet of only four roses that I shared last week was my first for In A Vase On Monday, and should have been my last. I do not intend for this to become a habit. I just happened to encounter a few cheap and trashy flowers right outside that I thought I could assemble for a picture. If I had planned this better, I would have gotten some more interesting flowers from work, and perhaps a more appropriate vase.

Common florist cyclamen should be finishing bloom now that the weather is warming. I am none too keen on how florist cyclamen is used as an expensive cool season annual, so started planting ‘used’ plants into some of the landscapes where they can grow as cool season perennials. They go dormant through summer, and then regenerate during autumn. I do not know why the specimen that produced these few rich red flowers was not planted with the others. It got potted instead, and is now in the recovery nursery.

Mosquito shoo geranium is a bit perplexing also. I got a few cuttings of what I thought was a more appealing scented geranium several years ago. I thought that those cuttings desiccated while I was in Southern California for several days. A few months later, mosquito shoo geranium appeared where the cuttings had been, and grew like a weed. I do not know if it grew from a surviving cutting, or from seed that blew in on the wind and just happened to land there. The specimen that provided these few flowers grew as a second generation seedling.

Flowering maple, although not naturalized, grows from seed near specimens that were intentionally planted. They are remarkably variable. The specimen that provided this single flower, as well as several other small specimen, were taken from a neighbor’s garden that could not accommodate all of them. We intended to add them to our landscapes, but have not done so yet.

The tiny vase is a ‘shooter’ bottle that formerly contained an ounce of some sort of tequila. A few of the same were found in the ivy of one of the landscapes at work. I like them because they are glass rather than plastic like the more common vodka shooter bottles. Also, they are adorned with that distinctive blue agave motif, which sort of makes them more horticulturally oriented.

The dusty shelf and glare on the glossy white background are no accident. The vase was placed on the sill below a whiteboard in our meeting room at work, just inside from where the flowers were collected. It seemed like an appropriate venue at the time, although I can now see that I could have done better.

In A Vase On Monday, which is also known simply as IAVOM, is graciously hosted by Cathy of Rambling in the Garden. Anyone can participate. Simply arrange flowers or other material from the garden in a vase, and share pictures of it with commentary and a link back to Rambling in the Garden. Also, leave a comment at Rambling in the Garden with a link back to your post.

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Sunlight Is Becoming A Commodity

Sunlight has not changed. Architecture did.

Shade trees are no longer appreciated like they had been. Only half a century ago, they were important components of suburban landscapes. Big deciduous trees shaded broad lawns and sprawling roofs during the warmth of summer. They defoliated to let warming sunlight through during winter. Now, modern architecture would not accommodate them.

Sunlight has not changed. Human interaction with it has. Modern homes are significantly taller, so create bigger shadows. They are closer together, with less garden space that is not within their bigger shadows, or shadows of adjacent homes. Higher fences intended to compensate for the minimal proximity of adjacent homes contribute even more shade.

Gardening can be difficult within the limited space and abundant shade of modern home gardens. Small evergreen trees or big shrubs that obscure unwanted scenery above the fences can also obscure much of the sunlight that manages to get past the infrastructure. Substantial vegetation in neighboring gardens can get close enough to be influential too. 

The primary part of modern homes that is not excessively shaded is the roof, which is not used for gardening. Trees that are proportionate to modern home gardens are not much taller than associated modern roofs. Modern attics are fortunately insulated so efficiently that shade is not important. Besides, many modern homes are outfitted with solar panels. 

Walls and windows of modern homes are efficiently insulated as well. Warming sunlight during winter is therefore not as much of an advantage as it is for older homes, although it is appealing within sunnier homes. Ironically, the utility cables of many modern homes are subterranean, so will not interfere with trees that get too big for their confined spaces. 

Regardless of their functions within their landscapes, even small trees can develop roots that are sufficiently aggressive to displace pavement and deck suspensions, particularly since they are likely to be close to them where space is limited. Turf grass that is thin and wimpy because of insufficient sunlight is more susceptible to lumpiness of surface roots. Because of proximity, neighboring gardens must be considered too.

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San Francisco Iris II – the Expected Sequel

This recycled article now reminds me that I should get some copies of this iris for my own garden, or to spread around in landscapes at work.

tonytomeo's avatarTony Tomeo

P80512KIt is not as if the previous article about it was inadequate. https://tonytomeo.wordpress.com/2018/05/05/san-francisco-iris/ I really did not want to get into the habit of writing so many sequels. However, something happened to necessitate this update.

I found what seems to be a REAL San Francisco Iris, right here in the Santa Cruz Mountains. Except for being somewhat etiolated from the shade of the surrounding redwoods, it looks very similar to the San Francisco iris I picked on the Montara Peaks when I was in high school! This one happens to be a bit lighter blue than most, but is certainly well within the color range of the flowers that I remember. Most were probably a bit darker blue, but many were lighter, and some were very pale blue.

It is impossible to know if it was planted in this spot that had been landscaped in the distant past, or merely…

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Deciduous Rhododendrons

These are already finished blooming here. This recycled article was more timely when it posted three years ago. So was the last paragraph, . . . which is useless now.

tonytomeo's avatarTony Tomeo

P80509They are not a myth. They are quite real. So are the related and similar deciduous azaleas. There are certainly not as popular or as diverse as the familiar evergreen cultivars, but they have their place.

Like the popular evergreen cultivars, deciduous rhododendrons and azaleas have been extensively bred so that they are more spectacular than their ancestors in the wild. They lack the purples and blues of the evergreens, but they compensate with bright oranges and yellows that are uncommon among the evergreen cultivars, as well as reds, pinks and whites. Some of their colors are bright and fiery, while some are more relaxed. Compared to evergreen rhododendrons, the flowers of the deciduous rhododendrons are smaller, thinner, and suspended in smaller trusses. However, these smaller trusses are often significantly more abundant, and are flashier as they bloom before new foliage develops in spring.

Deciduous rhododendrons and azaleas are not…

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Six on Saturday: More White Trash

White is my favorite color. That is why I write about it a bit more than I should. It seems simple enough to me. However, Brent says that I am a white supremacist. Furthermore, he says that I am white to go with it! More specifically, he says that I am white trash. I doubt that a white supremacists would agree, but I really do not care. White just happens to be my favorite color. That is why I got six pictures of white flowers for this week, even if some of them seem to be rather trashy to the more discriminating sorts.

1. Zinnia is a warm season annual that will now be with us through summer. I am none too keen on annuals. Fortunately, I need not work with them. Incidentally, the zinnia colors are mixed.

2. Petunia is another warm season annual for summer. Like the zinnia, their colors are mixed. Extra white petunia were added to the mix because I like white. I was uninvolved with selection.

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3. Rose should not be as trashy as annual bedding plants; but this one is Iceberg. As if that were not bad enough, it is grafted together with purplish Burgundy Iceberg as a standard ‘rose tree’.

4. Azalea should be less trashy than rose; but I believe that this one is Fielder’s White. I am not certain. It somehow looks differently this year. Regardless, I like it. Bloom is deteriorating now.

5. Geranium, which is more correctly known as zonal geranium because of its darker foliar halos or zones, is actually Pelargonium X hortorum rather than a geranium. These are new cuttings.

6. Angel’s trumpet is perhaps the least trashy of these Six, but looks shabby now because it is blooming so well with only skimpy foliage. It mostly defoliated after transplant three months ago.

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/

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Pittosporum tobira

There are too many other plants known as ‘mock orange’ for Pittosporum tobira to still go by that name, which is why it is more commonly known by its Latin name, or simply as ‘tobira’. The pleasantly fragrant flowers do not smell too much like those of orange anyway. The glossy and dark green leaves are like those of some hollies, without the distinctive prickly points. ‘Variegata’ has lighter green foliage variegated with white, but does not bloom as much. Dwarf cultivars, both variegated and unvariegatd, bloom even less. ‘Variegata’ has a tendency to occasionally produce stems of green (unvariegated) foliage that grow more vigorously and can overwhelm the original variegated growth if not pruned out. Common green Pittosporum tobira can grow as a small tree in the partial shade of larger trees, but is more often maintained as dense shrubbery less than ten feet tall. It makes a nice dense hedge in full sun, but unfortunately does not bloom if shorn regularly. All cultivars are resilient to drought once established.

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Fragrant Flowers Often Lack Color

Unremarkable flowers can be remarkably fragrant.

It is presumptuous to believe that all the fancy breeding that is done to enhance the characteristics of flowers necessarily ‘improves’ them. Breeding only makes flowers more appealing to those who enjoy them in their gardens. Most flowers were already quite efficient for their intended function in their respective natural habitats long before humans started tampering with them. As far as flowers are concerned, they only need to get pollinated.

Some flowers use flashy color or patterns to be visually attractive to pollinators. Others use fragrance to be olfactorily appealing. Small but profuse flowers that are neither colorful nor fragrant have given up on insect or animal pollinators, so instead rely on the wind to disperse their pollen.

Not many flowers are both remarkably colorful and remarkably fragrant like freesia, lilac and wisteria were earlier in spring. Lily and bearded iris are of course very colorful, but not all types are fragrant. The big and bold flowers of cereus cactus, moon flower and angel’s trumpet are only fragrant because they bloom at night, and rely on nocturnal  pollinators who benefit from a bit more guidance in the dark.

Many fragrant flowers are somewhat showy, like gardenia, star jasmine, pink jasmine and honeysuckle. (However, gardenia are almost never healthy and showy locally.) Many of the most reliably fragrant flowers are really not much to brag about. Pittosporum tobira, Pittosporum undulatum and sweet osmanthus are known more for the appealing evergreen foliage than for their small and nondescript flowers. The flowers of sweet osmanthus may actually be difficult to find amongst the obscuring foliage. Night blooming jasmine is sometimes planted around corners or in the background because even the foliage is not too appealing, although the powerful candy-like fragrance is a favorite for warm evenings.

Fragrant flowers can be annuals like sweet alyssum, bulbs like hyacinth, or perennials like tuberose. Woody plants with fragrant flowers can be vines like stephanotis, shrubs like mock orange (Philadelphus spp.), or trees like Southern magnolia. Some have brief bloom seasons, while others bloom for quite a while.