Next Year’s Roses

Water your roses during the hot summer to keep them happy and blooming!

A month ago I recommended deadheading re-blooming roses to promote another cycle of blooms. Now, as the end of June approaches is the time to deadhead one-blooming roses, not to extend the season, but to support formation of the greatest number of new buds for the next season.

Roses respond predictably to seasonal attention.

One of my roses that should be deadheaded now is the prolific producer, Rosa mulligani, shown during its recent peak of bloom.

Rosa Mulligani

If my schedule includes deadheading this plant during the next couple weeks, it will provide an even greater cascade of blossoms display next year.

This time of the year is also a good time to contemplate roses in your landscape.

The traditional time for such reflection is late fall and early winter when bare-root roses appear in local garden centers. These are often bleak days for the landscape when avid gardeners hunger for a burst of color in the landscape and respond eagerly to the enticements of dozens of rose photographs.

That’s a good time to add roses to your garden, but not the best time to re-think the role of roses in your landscape.

Many gardens include three or more (perhaps many more!) shrub roses, clustered primarily for ease of maintenance. In other words, there is a rose garden.

The most popular varieties are hybrid tea roses, which cross Rebloomers and tea-scented roses from China, and modern English roses, which cross old roses with hybrid teas. The English roses, notably those by David Austin Roses in western England’s Shropshire County, combine several of the most appealing qualities of roses: hardiness, durability, and fragrance.

The gardener cannot go far wrong by collecting English roses. If you are enjoying your rose garden as it is now, that’s fine.

Still, consider fresh looks at your garden to explore new ideas and your evolving priorities. This approach can inspire creative challenges and new interest in gardening.

Here are a few possibilities.

  • Clustered plants. A popular recommendation is to plant roses in groups of three, to increase visual impact. This approach counters the familiar use of single specimens, which favors variety over garden design.
  • A color-oriented theme. This could be a single color, e.g., white, different shades of a single hue, e.g., pink, or a combination of two or three colors that work well together. A bi-color combination of climbers on a trellis or arch can be striking.
  • Touring rose varieties. Roses have been grown in temperate climates throughout the world for over 5,000 years. A long list of interesting varieties awaits your exploration. Begin an absorbing online research by entering “Wikipedia garden roses.” You could soon be on your way to comparing the common and uncommon varieties in your garden.
  • Combining 0nce-bloomers and re-bloomers. The once-bloomers introduce a different rhythm to the rose season. Some are single-flowered, with just five or seven petals, offering an entirely different look in comparison to the lush varieties with as many as 100 petals. Sometimes, less is more!

We have access to many fascinating varieties within the genus Rosa, even before exploring the ever-expanding universe of hybrids. Your gardening experiences can be enriched by adventuring through the genus.

Eco-culture at The Garden Faire

The Garden Faire, now in its 11th year, originally focused on the best practices of organic gardening, conserving our finite water supply and protecting our watersheds from chemical contamination.

The Garden Faire spreads out on Skypark's playing fields-300

Click to enlarge

The Faire continues to deliver these messages and has added broader perspectives that emphasize the overarching notions of sustainability and stewardship of the environment.

Another, more recent theme in the Garden Faire’s evolution focuses on the nutritional and healthful aspects of our food. Edible gardening predates ornamental gardening by thousands of years, and responds to our fundamental needs for sustenance, while ornamental gardening feeds higher levels of our consciousness. Edible and ornamental gardening are complementary and each is indispensable within its respective sphere.

The Garden Faire continues to change. This year’s theme, Cultivating an Ecoculture, explores ways that humans already partner with Nature and opportunities to strengthen that critical relationship.

To appreciate the timely importance of ecocultural ideas, consider the development of academic pursuits. At some early point in history, scholars categorized knowledge with the disciplines: natural sciences, social sciences, humanities, and arts. They sub-divided each discipline into the numerous subjects we now encounter in formal education and splintered them further into courses within each subject.

The division of knowledge into academic disciplines responds to the human interest in managing and controlling nature and yields certain conveniences. Scholars can pursue specializations, schools can be organized into departments, courses and books can be labeled in ways that are widely understood.

Such arbitrary and artificial divisions also can lose awareness of the connectedness of biological and cultural diversity, and, indeed, of everything comprised by the diversity of life.

The academic disciplines are constructs, which depend for their existence on the minds of the persons who create them. They are not real objects, which are directly observable.

Today, as we are challenged by global issues of economic instability, resource degradation, biodiversity loss and climate change, our responses must be based on real objects, and on an integrative approach to conserving Nature alongside human culture.

In this pursuit, we can learn from the integrative approaches that indigenous cultures have practiced for millennia. These existing eco-cultures honor the unity of people with the rest of nature.

This brief article is not the place to enumerate specific eco-cultures of the world. For the present, it is sufficient to acknowledge that many groups, through many generations, have followed their instincts to achieve sustainability.

Working in harmony with nature is not a new idea. We see applications of that principle in gardening organically, conserving water wisely, consuming natural foods, exercising regularly to maintain body health. These are integrative practices that we can adopt readily as individuals.

As we increase the scale of human activities, however, and consider policies affecting groups of people, distractions and barriers come into play. The academic disciplines might not always support the connectedness of real objects, but they can serve as the basis of developing ecocultural practices. Indeed, many examples of cross-disciplinary and multidisciplinary initiatives can be cited. More would be helpful.

The work that lies ahead involves applying ecocultural concepts widely, in many (perhaps all) areas of human endeavor. The work includes adapting successful practices from the distant past to succeed in today’s fast-paced, complex society.

This work begins with individuals who grasp the concept and help to shape policies that will help to sustain life. It begins with you.

The world needs many conversations to advance the ecocultural perspective.

The Garden Faire supports one of those conversations for the Monterey Bay area, together with expert speakers on eco-culture, as well as gardening, water conservation, and nutrition. There’s much more: garden-oriented exhibitors, small farm animals, a krauting party, yoga and both familiar and exotic music.

***

IF YOU GO

What: The 11th Garden Faire

When: June 18th, 2016, 9:00 to 4:00, music continues to 9:00

Where: Skypark, Scotts Valley – free admission

Information:

The Garden Faire, now in its 11th year, originally focused on the best practices of organic gardening, conserving our finite water supply and protecting our watersheds from chemical contamination.

The Faire continues to deliver these messages, and has added broader perspectives that emphasize the over-arching notions of sustainability and stewardship of the environment.

Another, more recent theme in the Garden Faire’s evolution focuses on the nutritional and healthful aspects of our food. Edible gardening predates ornamental gardening by thousands of years, and responds to our fundamental needs for sustenance, while ornamental gardening feeds higher levels of our consciousness. Edible and ornamental gardening are complementary and each is indispensable within its respective sphere.

The Garden Faire continues to change. This year’s theme, Cultivating an Ecoculture, explores ways that humans already partner with Nature and opportunities to strengthen that critical relationship.

To appreciate the timely importance of ecocultural ideas, consider the development of academic pursuits. At some early point in history, scholars categorized knowledge with the disciplines: natural sciences, social sciences, humanities and arts. They sub-divided each discipline into the numerous subjects we now encounter in formal education, and splintered them further into courses within each subject.

The division of knowledge into academic disciplines responds to the human interest in managing and controlling nature, and yields certain conveniences. Scholars can pursue specializations, schools can be organized into departments, courses and books can be labeled in ways that are widely understood.

Such arbitrary and artificial divisions also can lose awareness of the connectedness of biological and cultural diversity, and, indeed, of everything comprised by the diversity of life.

The academic disciplines are constructs, which depend for their existence on the minds of the persons who create them. They are not real objects, which are directly observable.

Today, as we are challenged by global issues of economic instability, resource degradation, biodiversity loss and climate change, our responses must be based on real objects, and on an integrative approach to conserving Nature alongside human culture.

In this pursuit, we can learn from the integrative approaches that indigenous cultures have practiced for millennia. These existing eco-cultures honor the unity of people with the rest of nature.

This brief article is not the place to enumerate specific eco-cultures of the world. For the present, it is sufficient to acknowledge that many groups, through many generations, have followed their instincts to achieve sustainability.

Working in harmony with nature is not a new idea. We see applications of that principle in gardening organically, conserving water wisely, consuming natural foods, exercising regularly to maintain body health. These are integrative practices that we can adopt readily as individuals.

As we increase the scale of human activities, however, and consider policies affecting groups of people, distractions and barriers come into play. The academic disciplines might not always support the connectedness of real objects, but they can serve as the basis of developing ecocultural practices. Indeed, many examples of cross-disciplinary and multidisciplinary initiatives can be cited. More would be helpful.

The work that lies ahead involves applying ecocultural concepts widely, in many (perhaps all) areas of human endeavor. The work includes adapting successful practices from the distant past to succeed in today’s fast-paced, complex society.

This work begins with individuals who grasp the concept and help to shape policies that will help to sustain life. It begins with you.

The world needs many conversations to advance the ecocultural perspective.

The Garden Faire supports one of those conversations for the Monterey Bay area, together with expert speakers on eco-culture, as well as gardening, water conservation, and nutrition. There’s much more: garden-oriented exhibitors, small farm animals, a krauting party, yoga and both familiar and exotic music.

***

Tom Karwin is president of the Friends of the UC Santa Cruz Arboretum, president of the Monterey Bay Area Cactus & Succulent Society, and a Lifetime UC Master Gardener (Certified 1999-2009). Visit ongardening.com for links to information on this subject, and send comments or questions to gardening@karwin.com.

IF YOU GO

What: The 11th Garden Faire

When: June 18th, 2016, 9:00 to 4:00, music continues to 9:00

Where: Skypark, Scotts Valley – free admission

Information: http:/ /thegardenfaire.org

Landscape Uses of Plant Containers

Plant containers are popular as decorative elements in the garden. A well-placed large pot can provide a focal point, and a strategically arranged series of pots can lead the eye throughout a planned tour through the garden.

The color of a container can also contribute to the aesthetic of landscape by complementing plants in or near the container or by creating a visual exclamation point in a primarily green environment. Many containers in the garden marketplace are neutral in color, but bright hues are readily available as well, and color patterns have been appearing in recent years.

Containers provide familiar artistic forms in the garden, and can also support plant growth. Empty containers can stand alone as artworks, as well. Containers of all sizes can function like sculptures at more affordable prices.

Gardeners also experiment with other low-cost alternatives to sculptures: bowling balls, wine bottle trees, farm equipment, and porcelain accessories of the home have been striking and even unforgettable sights in some gardens.

A novel use of plant containers could be as elements of a thematic landscape.

In these columns, I have from time to time advocated a thematic approach to garden design. Many possible themes could provide an identity for some or all of a garden, and thereby support a rationale for plant selection.

Garden themes oriented to a single plant genus, e.g., roses, irises, dahlias, are quite familiar. Other themes emphasize a color combination, or one color, like the historic white garden of England’s Sissinghurst Castle.

My garden has several thematic beds. The largest beds are dedicated to each of the world’s five summer-dry climates: the Mediterranean basin, South Africa, southwestern coast of Australia, the central coast of Chile, and coastal California.

These beds might need to be identified for visitors, because most will not immediately recognize the origins of plants. I have considered placing an identifying sign in each bed, but would rather avoid that institutional look.

Another method for identifying a geographically defined bed might be to place in the bed a large container from that part of the world. Assuming that the visitor will recognize the container’s country of origin, it might serve to identify the bed.

To date, that idea has succeeded in exactly one instance. A Talavera pot now marks a bed of succulent plants from Mexico, which is not one of the world’s summer-dry climates.

The accompanying photo shows this pot with a young specimen of Agave applanata ‘Cream Spike’, from Mexico.

Cream Spike Agave

Many garden centers have at least a few Talavera pots. Authentic Talavera pottery comes only from the very old city of Puebla, in southeastern Mexico, but many products come from other sources. Regardless of authenticity, Talavera pottery is strongly associated with Mexico.

A fairly good marker for the bed of plants from the Mediterranean basin is a terra cotta container that suggests a Mediterranean style, confirmed by an image search of the Internet. The casual visitor, however, might find its message to be ambiguous.

Garden centers offer a good variety of plant containers, but few refer clearly to a country of origin. For example, the city of Pomaire, south of Santiago, is famous for its pottery, but when taken out of context, the pots do not identify as Chilean.

My search for thematic plant containers has yielded information about the world’s pottery traditions, and concluded that there is no good substitute for a sign. My next step is to try hanging clay nameplates on the pots. I’ll report on that approach in a future column.

Gardening can lead us in unexpected directions!

Garden Exchanges, Alstroemeria

My recent garden exchange experience generates thoughts about the ways in which gardeners share plants and other garden items.

In some Monterey Bay area communities, garden exchanges are infrequent occasions. There are successful events in Monterey and Seaside (and perhaps other communities) that local groups organize once a year. Santa Cruz has a low-key monthly exchange that is popular during the growing season.

Exchanges generally focus on plants as cuttings, bare-root specimens, seedlings (also called “starts”) in four-inch plastic nursery pots, and larger plants in one-gallon (or even five-gallon) pots. Empty pots and sometime other garden items also appear occasionally.

Most gardeners have plants that they could bring to an exchange simply because many good garden plants reproduce naturally and sometimes vigorously. While all plants that grow in a given area can be exchanged, this practice began with “passalong plants,” which are thought of as botanical heirlooms that have survived for decades primarily by being handed from one gardener to another. These plants might not be easily found in garden centers because they reproduce so easily that commercial growers choose not to compete with nature.

One example of such a plant is the Alstroemeria, commonly called the Lily of the Incas. This plant is also called the Peruvian Lily, although they are native to either central Chile (winter-growers) or eastern Brazil (summer growers). Central Chile, as you my recall, has a summer-dry climate very much like that of the Monterey Bay area, so these plants thrive locally.

Alstroemeria

Alstroemeria in bloom

The Alstroemeria reproduces by creating clusters of small tubers that are easily shared and grown. Plant the tubers horizontally, about eight inches deep.

This plant’s blossoms are available in many shades of red, orange, purple, green, and white, flecked and striped and streaked with darker colors. It produces long flower stalks and is a very good cut flower. To stimulate blossoming, tug the flower stalks instead of cutting them. They release easily.

The Alstroemeria produces large numbers of tubers, so many that it can be difficult to dig into a long-established bed. This growth habit exemplifies the passalong plant: desirable and prolific.

Steve Bender and Felder Rushing wrote Passalong Plants (2002), in which they describe 117 plants that have been shared for many years in the southeastern states. There are at least as many plants that are traditionally shared by coastal California gardeners, including both natives and imports.

I collected two free plants at last week’s garden exchange:

  • a seedling Tree Tomato (Tamarillo), a native of Chile that is a fast-growing tree that produces egg-shaped edible fruits with exotic appeal. It could grow quickly to fifteen feet, but can be limited by pruning. I’ll try it in my Chilean bed.
  • Mother of Millions (Bryophyllum delagoense), a succulent plant with interesting leaves. It is native to Madagascar that “escaped” to Australia, where is it considered a noxious weed. Each plant produces small plantlets along the edges of its leaves that detach and form new plants. This makes it difficult to eradicate. It is also toxic to humans, pets and livestock. I will not add this plant to my garden. Or share it.

Visitors to the garden exchange also presented a wide variety of other popular plants. These examples suggest that both interesting and troublesome plants might be available, so a brief inquiry on the Internet research is always appropriate before adding an unfamiliar plant to the garden.

The next Santa Cruz Garden Exchange will be at the Eleventh Annual Garden Faire in Scotts Valley, Saturday, June 18th. For information, visit http://thegardenfaire.org.

Acanthus: Love & Hate

Aside

There are plants that most gardeners hate and other plants that most gardeners love. It is a rare plant, however, that provokes both love and hate in the same people.

The Acanthus is one of those rare plants.

Let’s consider why it generates strong reactions, both positive and negative.

The genus Acanthus includes twelve species. Various species are native to Europe and the Mediterranean basin, Africa. South Asia, and Australasia.

Three species from the Mediterranean basin are cultivated in many American gardens: A. mollis, A. spinosus, and A. balcanicus and are popular in Monterey Bay area, where the climate resembles the plant’s native environs.

Acanthus spinosus

Acanthus spinosus (click to enlarge)

These popular species are similar in appearance, with differences primarily in the lobes of the leaves: some have more deeply cut lobes than others. Generally, Acanthus is a clump-forming perennial plant that is grown for its attractive foliage and bold flower spikes. It works best placed behind smaller plants, to provide a lush backdrop for the landscape.

Given a favorable climate and adequate drainage, the Acanthus adapts to various soil types, and is usually pest- and disease-free, except for an occasional snail that tries to nibble the plant’s hard and glossy leaves. It prefers partial shade, but in our moderate climate also does well in full sun. It will grow in one season up to four feet high and wide, with some flower spikes reaching above the leaves.

At the end of the season, the flowers fade and the leaves wilt, and new leaves spring from the base. It’s time to cut the old growth to the ground and welcome a new cycle of growth.

Everything about the plant seems fine, right? Let’s look at the sources of ill will.

Firstly, a relatively minor concern is the plant’s prickliness. The genus name comes from the Greek word akantha, which means spine and refers to the edges of the leaves. When we encounter A. spinosus, we have the addition of the Latin term for spine, and a plant that might be called “Spiny Spiny.”

Actually, the Acanthus’ common name is “Bear’s Breeches.” I have not found an explanation for that odd name.

Secondly, the Acanthus propagates too readily. It develops creeping rootstocks and drops seeds, and has been considered invasive in some agricultural areas, but the progeny are really not difficult to control in a garden setting.

Thirdly (and this is the big negative), a well-established Acanthus is very difficult to eradicate. The smallest piece of root left behind will sprout into a new plant. Gardens change by the gardener’s design or by Nature’s plan, but the Acanthus is forever.

Given the excessive persistence of the Acanthus, we might have mixed feelings about the introduction of a new hybrid form of the plant. But the recent appearance of Acanthus ‘Whitewater’ has generated enthusiasm. This plant has variegated leaves and blossoms in white and cream, aging into pink. A mature clump of this plant in the right setting could be a knockout. (The ‘Whitewater’ photo is from Terra Nova Nurseries.)

Acanthus 'Whitewater'

Acanthus ‘Whitewater’

I have struggled to eliminate A. mollis and found A. spinosus to be better-behaved, so I’m hesitant to plant ‘Whitewater’ in my garden. It’s striking appearance, however, invites a compromise: container planting. The pot should be large enough for the roots, the right proportion for the largish plant, and in a color that complements green and white with a touch of pink. I have begun looking!