Sunday, May 1, 2011

UC Davis Arboretum plant sale

The University of California Davis Arboretum has several plant sales each year, both in the spring and in the fall. I went to one on Saturday morning and finally remembered to bring a camera along. The sales are held at the new Arboretum Teaching Nursery which opened a few years ago, and the variety of plants they offer is impressive. Click here to see a list of the plants that were for sale today; this gives you a good idea of what to expect. Prices are generally in the $18-20 range for a 5 gallon plant, $10-12 for 1 gallon, and $7.50 for 4”.

In addition, the UC Davis Botanical Conservatory has a few tables with succulents, exotic houseplants, carnivorous plants, and other oddities. These plants are a real bargain. For example, I paid $4 this morning for a 2.5” Obregona denegrii cactus. This is a very slow-growing cactus, and a 2.5” specimen is easily 6-8 years old.

If you live in Northern California, I can highly recommend these sales. You’ll find plants that are hard, if not impossible, to find in commercial nurseries.

The UC Davis Arboretum will have a one more sale this spring, arguably the best deal of the season:

May 14 — End-of-Season Clearance Sale: reduced prices on many exceptional plants.

The next one after that is in early fall:

September 24 — Plant Faire: celebrating the Arboretum’s 75th Anniversary Diamond Jubilee.

In addition, don’t miss the plant sale at the San Francisco Botanical Garden on May 7th. Click here for more information. The selection is going to be amazing.

110430_UCD_Arboretum_plant_sale_01
Lots of people trying to decide what to buy
110430_UCD_Arboretum_plant_sale_04
These are all 1-gallon plants in the $10-12 range
110430_UCD_Arboretum_plant_sale_06
Agave ‘Blue Glow’, for sale at $7.50 for a 4” container
110430_UCD_Arboretum_plant_sale_08
Succulents for sale by the UC Davis Botanical Conservatory; these are great bargains
110430_UCD_Arboretum_plant_sale_09
$4 succulents
110430_UCD_Arboretum_plant_sale_10
Half barrels demonstrating various themes. This barrel showcased “Color”…
110430_UCD_Arboretum_plant_sale_11
…and this one “Texture.”
110430_UCD_Arboretum_plant_sale_19
Along the outer perimeter of the Teaching Nursery there are beautifully landscaped beds showcasing the Arboretum All-Stars, “100 tough, reliable plants that have been tested in the Arboretum, are easy to grow, don’t need a lot of water, have few problems with pests or diseases, and have outstanding qualities in the garden.”
110430_UCD_Arboretum_plant_sale_15
Our haul this morning (I went with a friend)

Saturday, April 30, 2011

Yet another plant trade

Only a week after my last plant trade, another goodie box arrived yesterday. It was just a small box, 8½" x 5½" x 1½", but it was crammed with a bunch of plants. After I tore open one side, I got a first glimpse of what was inside. The spotted leaf shown in the photo below was a tantalizing teaser!

110428_box_from_sl
First peek of what’s in the box

Trying to be as careful as I could because the plants were packed tightly, I extracted the contents from the box. After I laid everything out, I couldn't believe that all these plants had come from that small box.

110428_goodies_from_sl
Contents of box

The variety really is astounding: We have an angel wing begonia, two bamboo seedlings, three Epiphyllum and two Hylocereus cuttings, three sempervivums, and a ghost pepper seedling!

110428_angel_wing_begonia
Angel wing begonia potted up

I’ve wanted a spotted angel wing begonia for a long time, and I’m glad I now have one. Here is an in-depth description of this hybrid that was created back in the mid-1920s. There are many different cultivars, but this spotted one is my favorite. It is a truly tropical plant, not taking any frost, so it’ll live inside in the winter. (I guess I’m turning into a houseplant guy by default.) I plan on leaving it outside in a bright and warm location away from the hot afternoon sun.

110428_succulents
Three kinds of succulents:
Epiphyllum, Sempervivum, and Hylocereus (dragon fruit)

On to the succulents that were in the box: In addition to three small sempervivum offsets (or hens-and-chicks, as they are often called), I also received cuttings from two fruit-bearing cacti: Epiphyllum and Hylocereus.

Epiphyllum flower
Image courtesy of Wikipedia

Epiphyllum is a genus of cacti from Central America that grow epiphytically, i.e. attached to other plants (typically trees) instead of in the ground. Commonly known as orchid cacti, they are popular as houseplants because of their large and fragrant flowers that bloom for a single night only. They produce small, edible fruit similar to the dragon fruit from the closely related genus Hylocereus.

Hylocereus is a genus of vine-like epiphytic cacti native to the Americas but cultivated in many Asian countries for their fruit. With its distinctive look, both outside and inside, and its sweet and refreshing taste, dragon fruit (or pitaya) is a standout. Fortunately, it’s becoming more available here on the West Coast. Check out this Wikipedia article for photos and more information about this intriguing plant.

Dragon fruit (pitaya)
Image courtesy of Wikipedia

I really don’t hold out hope for my own crop of dragon fruit since I’m not sure that we have the necessary pollinators (bats and moths) in our yard, but I will enjoy the fragrant flowers. Both Epiphyllum and Hylocereus are tropical plants and will need to overwinter inside in our zone.

110428_bhut_jolokia
Ghost pepper or bhut jolokia (Capsicum chinense x frutescens)

The next plant is not an ornamental but a vegetable. It’s a ghost pepper, also known as Naga Jolokia or Bhut Jolokia. The 2007 Guinness Book of World Records listed this Indian hybrid as the “world’s hottest chili pepper,” more than 400 times hotter than Tabasco sauce—which to many people is already spicier than they care for. Since then, two other peppers have been rated hotter, but that doesn’t diminish the fact that this is a puppy with a big bite. (Here’s a detailed listing of where various types of peppers fall on the Scoville scale.)

The real question is: What am I going to do with the peppers? The honest answer is: I don’t know yet. But it’s kind of cool growing such a racy plant.

110428_Fargesia_nitida_left_Phyllostachys_kwangsiensis_right
Fargesia nitida (left) and Phyllostachys kwangsiensis (right)

The final two plants in this box were bamboo seedlings my trading partner had started himself: a clumping (Fargesia nitida) and a running bamboo (Phyllostachys kwangsiensis). Both species are very cold hardy (below 0°F) and both flowered in the last few years, which is why seeds had become available.

Bamboos flower very sporadically; depending on the species, many decades can go by between flowering. The mechanism is poorly understood; Wikipedia lists a few intriguing hypotheses. In many species, mass flowering leads to the death of the plant, while other species recover. I wrote last fall about a few bamboos in my collection that were (and still are) flowering.

Since seeds are so rarely available, bamboos are typically propagated by division (i.e. a piece is removed from the mother plant) or in a laboratory via tissue culture. This results in plants that are genetically identical to their “parent.” Therefore, if the parent starts to flower, its children will flower, too. Plants grown from seeds, on the other hand, represent a new generation whose internal flowering clock has been reset so it will not flower for many years to come.

Beautiful specimen of Fargesia nitida 'Nymphenburg' (commonly known as “fountain bamboo”) at the entrance to Bamboo Sourcery in Sebastopol, CA

Fargesia nitida is a very popular clumping bamboo that has shown outstanding cold hardiness. According to several sources, it has been grown with success in Tromsø, Norway, north of the Arctic Circle. Fargesia nitida started to flower all over the world beginning in the late 1990s (the first time since the 1880s), leading to the demise of untold plants. Fortunately, copious amounts of viable seed was produced and a new generation of seedlings has been established, which in all likelihood won’t flower until well into the next century.

Phyllostachys kwangsiensis is a running bamboo that was only recently introduced into the U.S.  Dubbed “Moso of the north” for its resemblance to Phyllostachys edulis (the famed Moso bamboo of China, seen for instance in the movie Crouching Tiger, Hidden Dragon) and its size potential, it promptly began to flower—much to the chagrin of the few collectors that had managed to get a hold of a specimen. My trading partner was able to get seeds and successfully germinated them. My seedling is still small and it’ll be a few years before it needs to be put in the ground. When the time comes it will join the growing bamboo collection at my in-laws’ property in the mountains of Northern California.


While I admit that having a gardening blog makes it easier to find people to trade with, I bet it won’t take you long to find like-minded gardeners in your area who have something you don’t have yet. I encourage you to share plants and spread your knowledge, thus contributing to the spirit of openness and generosity so prevalent in the gardening community.

Related posts:

  • A few updates (10/23/11)
    See how the angel wing begonia has grown

Friday, April 29, 2011

What caught my attention in our backyard today

Even though our property is on the small side, I go exploring every day—sometimes twice a day—to see how things are coming along. Changes are coming fast and furious at this time of year, and I’m finally making a systematic effort to document as much of it as I can.

110428_hosta_june lamium
While our climate isn’t really conducive to hostas, they are among my favorite shade plants so I keep trying. This is a cultivar called ‘June,’ surrounded by a sea of Lamium maculatum .’Purple Dragon’.
110428_hosta_sagae
This hosta ‘Sagae’ just came up a few weeks ago—really late because of the cooler than usual weather. To the right is a variegated farfugium (Farfugium japonicum ‘Argentea’) just planted this spring.
110428_hakone
My favorite shade-loving grass, bar none: Japanese forest grass (Hakonechloa macra ‘Aureola’). After four years in the ground, it’s finally put on some size (about 15 inches high).
110428_meadow_rue
Meadow rue (Thalictrum aquilegifolium) starting to bloom
110428_columbine_mckanas_giant
First flowers on this columbine ‘McKana’s Giant’ (Aquilegia caerulea ‘McKana’s Giant’)
110428_nasturtiums2
Trailing nasturtiums (Tropaeolum majus) in all their glory.
They reseed reliably every year.
110428_nasturtiums
Nasturtiums in our backyard succulent bed.
110428_elderberry_black_lace
‘Black Lace’ elderberry (Sambucus nigra ’Black Lace’). Planted three years ago from a 4” container, it’s finally coming into its own. Very difficult to photograph because of its purple-black foliage against the redwood fence. It’s just now starting to bloom, and the flowers are stunning.
110428_elderberry_black_lace2
‘Black Lace’ elderberry flower head.
This is one of my wife’s favorite plants.

I can’t wait to see what I might discover tomorrow!

How often do you check for progress in your garden?

Thursday, April 28, 2011

Ice plants lighting up the garden

Three years ago I planted some trailing ice plants (Delosperma cooperi) in a hot and dry spot in our front yard where previously nothing much would grow. This area is at the bottom of a slight slope which used to be dominated by a mistletoe-infested Bradford pear. This tree hogged all the water and nutrients it could, making it difficult for other plants to thrive near it.

110426_Delosperma_cooperi_05
Delosperma cooperi bordering a sea of yellow:
Jerusalem sage (Phlomis fruticosa) at the top left,
Cape balsam (Bulbine frutescens) below it

Fortunately, this tree was removed by the City of Davis in January of 2010 and we replaced it with a giant clumping timber bamboo (Bambusa oldhamii). This area is now completely transformed. Not only is the bamboo thriving, all the other plants are as well. This includes our trailing ice plants. They have more than quadrupled in size and at the moment are lighting up this part of the planting strip with a color so intense, it almost looks unreal.

110426_Delosperma_cooperi_06
Delosperma cooperi in full bloom
110427_Delosperma_cooperi_02
The flowers only open up when exposed to strong sunlight. This is what they look like in the morning and evening, or on cloudy days.

Delosperma cooperi is one of many plants that go by the moniker “ice plant.” Native to South Africa, it is a drought-tolerant creeper with very small leaves—significantly smaller than the sea fig (Carpobrotus chilensis), for example. It needs full sun and well-drained soil but does tolerate a bit more water than many other ice plants. It blooms from spring to fall, although in my experience the initial burst of flowers is by far the best.

Unlike most other ice plants, Delosperma cooperi is very cold hardy, supposedly all the way to zone 5. However, the Missouri Botanical Garden says that in the St Louis area (zone 6), Delosperma cooperi is “at best semi-evergreen and is not reliably winter hardy.”

110426_Delosperma_cooperi_03
 
110426_Delosperma_cooperi_07
 

Delosperma cooperi flowers are typically fuchsia purple, like ours. However, in recent years some hybrids have come out that have different colors. At the top of my wish list is salmon pink Delosperma ‘Kelaidis’, named after Panayoti Kelaidis, Curator of Plant Collections at the Denver Botanic Gardens where it appeared as a seedling mutation. I’m still waiting for this hybrid to make an appearance at our local nurseries; I’m sure it will eventually since it’s distributed by Monrovia under the registered trademark Mesa Verde®.

Apparently, Delosperma cooperi is easy to propagate from cuttings. I will definitely give this a try so I can spread it to different areas of our front yard planting strip.

Some interesting side notes:

In addition to Delosperma cooperi, the name “ice plant” is also used for the sea fig (Carpobrotus chilensis) commonly found along the shoreline on Central California’s Monterey Peninsula, the closely related Hottentot fig (Carpobrotus edulis), as well as many other plants in the genera Lampranthus, Drosanthemum (known as the “vygies”), and Aptenia. Confusion reigns supreme!

Many gardeners on the California coast lump all ice plants together under the moniker “mesembryanthemum.” Today, the genus Mesembryanthemum only contains a few ice plants rarely seen outside South Africa. However, in the past it also contained the ice plants so ubiquitous along the California coast, especially the invasive sea fig, Carpobrotus chilensis, which in spite of its species name is native to South Africa, not Chile. It has become such a common sight that many people—including gardening web sites—think it’s a California native. Massive efforts have been made in the last 20 years to eradicate Carpobrotus chilensis and edulis so native plants have a chance at a comeback. While ecologically sound, this hasn’t been an easy sell to the public since in a floral beauty contest Carpobrotus would beat the coastal natives any day.

Wednesday, April 27, 2011

Orchid Wednesday

Usually I don’t pay much attention to houseplants, but when we were visiting my in-laws over Easter weekend, I couldn’t help but notice my mother-in-law’s orchids. Their beauty was so seductive that I didn’t even try to resist. Out came the camera, and these portraits are the result of our little tête-à-tête.

110424_Phalaenopsis3
 
110424_Phalaenopsis4
 
110424_Phalaenopsis5
 
110424_Phalaenopsis2
 
110424_Phalaenopsis1
 
110424_Phalaenopsis6
 

These are Phalaenopsis hybrids, commonly called “moth orchids” because the flowers are said to resemble moths in flight.They are native to Southeast Asia, and most of them are epiphytic, i.e. they grow on other plants, usually trees. That explains why in cultivation they’re not potted in soil but rather in a coarse medium typically consisting of bark, expanded clay pellets, or sphagnum moss.

There are so many fascinating things to learn about orchids, and if I don’t stop myself now, there’s no telling where it might end!

I will, however, recommend an orchid book that is as spellbinding as a good thriller. It’s called Orchid Fever: A Horticultural Tale of Love, Lust, and Lunacy and was written by journalist Eric Hansen. This book is not about orchid cultivation or care, but rather about the weird, wonderful, and, yes, dangerous subculture of orchid collecting. Be sure to read the reviews on Amazon; you’ll be as intrigued as I was. The book was everything I had hoped it would be.

Tuesday, April 26, 2011

Easter planting at the in-laws

We spent this past weekend at my in-laws who live in Mount Shasta, 215 miles north of here, not only to celebrate Easter with them, but also to deliver a bunch of plants I’d been collecting for them since the fall. Some of them were divisions from plants in our own garden, others I got on close-out, and a few were regular purchases. This is what we hauled in our van:

7 lavenders
22 ornamental grasses
1 dogwood
2 junipers
2 bamboos

110423_plants_in_car
Our van loaded with plants…
110423_bamboo_in_car
…including two bamboos (Phyllostachys bambusoides and Phyllostachys nigra ‘Henon’)

Mount Shasta is in zone 7a and spring is just now starting to arrive there—weeks later than usual because of the longer-than-usual winter. In fact, they’d had fresh snow just last week! While Saturday, our planting day, was cool and drizzly, it was actually fairly pleasant for gardening.

The following photo shows the hill in front of their house where we planted everything except for the two bamboos and the holly. The section on the right (not visible in the photo) is studded with trees and hence shady, but the area you see below gets a good 6 hours of direct sun in the summer. Right now, the hillside is covered with periwinkle (Vinca minor), some irises, and the occasional Western redcedar (Thuja plicata) seedling.

110423_hill0
Hillside before replanting

In their 1-gallon nursery containers, the lavenders and grasses looked to be of decent size, but once planted out, they seem to disappear into the carpet of conifer needles and periwinkle. Eventually they will dominate the hillside—especially the grasses in the 5-7 ft. range—but for now the fruits of our labor seem disappointingly meager. I’m so used to gardening on a small (sub)urban plot where even one plant makes a difference that I was a bit stunned to not see a more dramatic improvement right away.

110423_hill1
 
110423_hill4

In addition to grasses and lavenders, we also planted three shrubs on the hill: two ‘Old Gold’ junipers (Juniperus x media 'Old Gold'), a compact spreader to 2 ft. in height; and a variegated Siberian dogwood (Cornus alba 'Elegantissima'), renowned for its red stems which provide winter interest. The dogwood should look stunning with a blanket a snow.

110423_hill3
‘Old Gold’ junipers (Juniperus x media 'Old Gold')
and  variegated Siberian dogwood (Cornus alba 'Elegantissima')

The following drawing shows what went where. It’s mostly for ourselves so we’ll be able to identify the plants later on. Many of the grasses are new to us, especially the switchgrasses (Panicum virgatum sp) and Indian grass (Sorghastrum nutans 'Indian Steel'). These grasses are native to the tallgrass prairie that once covered large portions of the Midwest. They are very cold-hardy, and I’m hoping they’ll do well here in the Northern California mountains.

110423_hill_planting_scheme

We also found a home for this holly that I bought on clearance at Lowe’s in January. It’s actually a matched pair of a female (Ilex x meserveae 'Blue Princess') and male plant (Ilex x meserveae 'Blue Prince').

110423_holly
Holly ‘Royal Court’ ((Ilex x meserveae 'Blue Princess'
and Ilex x meserveae 'Blue Prince')

The final two plants we put in the ground were running bamboos of the genus Phyllostachys. The first one, Phyllostachys nigra ‘Henon’, went on another hill across the driveway from where we put the ornamental grasses and lavenders. Here it will have room to expand. ‘Henon’ is a timber bamboo with the potential to produce 4” culms that grow 55 ft. tall. It’s the all-green version of the popular black bamboo (Phyllostachys nigra), and has small and elegant leaves just like its relative.

110423_henon_h2
Phyllostachys nigra ‘Henon’, looking lost now,
but it will come into its own in a few years

The 2nd bamboo was a Phyllostachys bambusoides, also known by its Japanese name madake. It is a true giant (70 ft., 6” culms), with extremely sturdy culms that live 20+ years. It is a highly valued construction material in Japan, but it establishes much more slowly than other timber bamboos like ‘Henon‘. I don’t know how well it will do in Mount Shasta since it’s only hardy to 5°F, but the plant I had didn’t represent a great financial investment, so it’s worth a try.

I should add that the hole for the madake was dug in no time at all by my father-in-law using his trusty backhoe. In fact, the very first post I ever published on this blog was about transplanting a black bamboo (seen in the upper left quarter of the photo below) using this very backhoe. Click here to read this post.

110423_bambusoides
Phyllostachys bambusoides

All in all, it was very productive Saturday, and we left behind an impressive jumble of empty nursery pots.

110423_empty_pots

Monday, April 25, 2011

Planting tomatoes (and some other veggies)

Over the years we have grown many different vegetables but there are a few kinds that seem to do better in our garden than anything else: summer squash (yellow crookneck, zucchini, etc.), cucumbers, and tomatoes. While I’m not fond of summer squash myself, my wife likes it so we always get one plant (which, I might add, produces all the squash we need). Cucumbers, on the other hand, I do like, especially in refreshing dishes like Greek tzatziki or sliced with a simple vinaigrette.

However, summer vegetable gardening for me is all about tomatoes. The Sacramento area is a major producer of tomatoes, especially for canning. In fact, one of Sacramento’s nicknames is “Sacratomato.” Our weather is just about perfect: lots of sun and heat, and low humidity. While not drought-tolerant by any means, tomatoes don’t need to be watered every day either, like lettuce and other more sensitive veggies might. I find a deep watering every 3 days or so is sufficient. Our vegetable beds are on a drip which we run every three days for 30 minutes.

This spring has been much cooler than usual so we’re actually quite late putting out vegetables. We started on Friday with a couple of squash and cucumbers, a jalapeño to go with the Mexican chile peppers I started from seed the other day, and a bunch of tomatoes.

Two of the tomatoes are commercial varieties from our local Ace Hardware garden center: Sun Gold and Yellow Pear. These are small tomatoes with a concentrated flavor that in my mind are perfect for eating fresh and for cooking (I’m not into huge beefsteak tomatoes).

Sun Gold
Photo from TradeWindsFruit.com
Yellow Pear
Photo from TomatoGrowers.com

We also planted a bunch of heirloom tomatoes a friend of ours had given us. Every year she supplies us with seedlings of rare and unusual varieties, and we love the suspense of not quite knowing what we’ll get. This year we have Amish Gold, Black from Tula, Gary Ibsen’s Gold, Japanese Black Trifele, and Oaxacan Jewel. Our friend gets her seeds from Gary Ibsen’s TomatoFest, and the photos and descriptions below are from that site as well. It certainly looks like a very interesting bunch!

Amish Gold
“Cross between Amish Paste and Sungold. Fruit has the gold color and flavor of the Sungold, the meatiness of the Amish Paste and delicious sweet/tart tomato flavors.”

Black from Tula
”Russian heirloom from Tula. Largest of the black tomatoes with 3-4", slightly flattened, oblate, dark brown to purple fruit with deep green shoulders. Deliciously outstanding, rich, slightly salty, smoky-fruit flavor.”

Gary Ibsen’s Gold
”Very juicy, 14 oz. , brilliant orange-gold globes with tropical fruit flavors with enough acid balance to guarantee a burst of tomato delight.”

Japanese Black Trifele
”Prolific quantities of 6 oz. fruit that looks like a beautiful mahogany-colored Bartlett pear with greenish shoulders. Very tasty flesh with a meaty core that produces luscious fruit all summer long.”
Oaxacan Jewel
“Beautiful 1/2 pound, yellow beefsteak tomato with red streaks throughout the fruit. Wonderfully rich, sweet flavors.”

Over the next few weeks we’ll add a few more things to our veggie beds, including beets as well as herbs like basil and cilantro which we consume in great quantities in the summer. On a hot summer day, I love nothing better than a Caprese salad, fresh bread, and a slushy blended margarita.

Here are the two beds we planted the tomatoes in. The big leafy plant in between the two beds is a rhubarb in a half barrel. It’s almost time to start harvesting it. Rhubarb compote and strawberry-rhubarb pie, I can’t wait!

110422_veggie_bed1
 
110422_veggie_bed2
 

We also planted a couple of things in a container next to the left-most of our four raised vegetable beds. It’s what my younger daughter sees from the window in her room, so we call it “her” barrel. Last week I sowed some cosmos and rudbeckia seeds (they’re already germinating), and just today we added this gerbera daisy and a strawberry that my daughter had picked out.

110422_els_barrel
 

It’s great to see this corner of the back yard finally come alive!