Tag Archives: perennials

Tranquil Blue in the Garden

With the heat of summertime upon us I’m drawn to those areas in my garden that have blue, white and lavender flowers. A hot day just seems cooler there.

Washed out magenta is nature’s favorite go-to color and the shade that hybrids will revert to it if allowed to go to seed. Among gardeners, red is a favorite color. Orange and yellow come next, then pink and purple with blue and white both comparatively rare in nature last on the list.

geranium ‘Orion’

So naturally, most of us gardeners want the elusive blue flower in our gardens. Knowing that cool colors recede, place them around the edges or at the back of a garden to make your space appear wider or deeper.

True blue flowers are rare. We use words like cerulean, azure, cobalt, sapphire, turquoise, electric blue or steel blue when describing blue flowers. Hybridizers have tried for years to produce a true blue rose or blue daylily. Blue plant pigment is hard to manipulate. It occurs in the daylily as a sap-soluble pigment and is difficult to segregate. Lilacs, purples, orchids and mauves we have and working with them hybridizers may eventually get near blue, but pure blue probably never. Recently, some companies have found a way to insert some blue in the center of their daylily flowers but a totally blue daylily has never been produced.

Rose hybridizers striving for true blue have come close by

hydrangea macrophylla

crossbreeding lavender hybrid teas in order to produce offspring having optimum amount of cyanidin, the pigment that imparts purple or magenta tones and flavone, the pigment that gives light yellow tones.The results have been more of a silvery lilac or mauve. A blue rose is still in the future although labs in Australia and Japan are genetically modifying the pigments from petunias to produce a blue rose. Their results are not yet perfected and these roses are more of a lilac in color and can not survive conditions outside the lab. It is apparently very difficult to isolate the pigment cyanadin. Delphiniums have a monopoly on it.

omphaloides

The color blue is calming and tranquil. It is the color of serenity and peace and is said to slow down the metabolism and reduce the appetite. When brightened with white or combined with yellow or orange in a complementary color scheme the results of blue in the garden are breathtaking. The great English gardener Gertrude Jekyll used plants with golden leaves or clear yellow flowers to spice up blue gardens. Just remember that blues and purples are the first flowers to fade as darkness falls so be sure to have those whites and yellows to carry your garden into evening.

There are many blue perennials as handsome as they are durable that we can enjoy in our gardens today.
Some of my favorites are old fashioned hydrangeas, violas and campanula. Both are valuable in the shade garden along with omphaloides and brunnera. The blue spikes of a long blooming peach-leaf campanula just go together with the white and green variegated foliage of Jack Frost Siberian bugloss.

agapanthus africanus

In early spring we are dazzled by our native ceanothus which bloom with deep blue, sky blue or electric blue flowers. Emerald Blue phlox subulata carpets the ground in spring with clear blue flowers that top creeping stems. Penstemon Blue Springs, a California native hybrid, carries dense spikes of bright blue, bell-shaped blossoms.

Make sure your garden has a blue section to cool you on a hot day.

Late Summer Tasks for the Garden

It’s darker in the mornings now with the sunset coming earlier each evening. All that time I thought I’d have back in June to get things accomplished in the garden has vanished in what seems like a wink of an eye. Still the weather these days is perfect for being outside and pecking away at my to do list. There are also some late summer/early fall tasks that need attention.

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Alstroemeria ‘Rock & Roll’

Now through October, divide summer blooming perennials like alstroemeria, agapanthus, coreopsis, iris, daylily, yarrow, rudbeckia, calla lily, aster and penstemon that are overgrown and not flowering well. You can also divide spring blooming perennials like candytuft, columbine, astilbe, bergenia and bleeding heart although they don’t always bloom the first spring afterwards due to the energy they use re-establishing themselves. Start perennial flowers seeds now so that they will be mature enough to bloom next year.

This is the perfect time for transplanting or adding new plants to your garden. Why? Cooler air is kinder to plant foliage and soil temperatures are still warm which creates an excellent environment for new root growth. In the fall many plants and trees, even broadleaf evergreens, are entering a period of dormancy. With no need to allocate resources into foliage, plants are transferring all their energy into roots and storing nutrients for the cool months ahead. By spring, the new roots system should be well established.

Perhaps it’s time to remove or reduce lawn. Replant with more drought tolerant ornamental grasses or perennials.

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Achillea millefolium

Fertilize shrubs lightly one last time with an all-purpose organic fertilizer or layer of compost. This advice doesn’t apply to California natives. They like compost only around the roots during the winter while they get ready for their growing season.

Roses especially appreciate a bit of fertilizer now, encouraging them to bloom another round in the fall. To keep them blooming make a habit of pinching and pruning off old flowers. Always cut back to an outward facing branchlet with five leaves. There are hormones there that will cause a new flower bud to grow much sooner than if you cut to one with only three leaves.

Plant cool season veggie starts like broccoli, cabbage, cauliflower, chard, lettuce, spinach, brussels sprouts, onions and leeks in soil enriched with 4-6″ of compost as summer vegetable crops will have used up much of your soil’s nutrients.You can sow seeds of beets, carrots, radishes, spinach, arugula, mustard and peas directly in the ground.

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Soil builder cover crop mix

If you aren’t going to grow vegetables in the garden this fall consider planting a cover crop like crimson clover, fava or bell beans after you’ve harvested your summer vegetables.

Cut back berries vines that have produced fruit. Canes of the current season should be trained in their place.

Spider mites are especially prolific during hot, dry weather. Sometimes you don’t even know how bad the infestation is until all your leaves are pale with stippling. Periodically rinse dust and dirt off leaves with water. Spray the undersides of infected leaves with organics like insecticidal soap switching to neem oil if they build up a resistance to one of the pesticides.

And whatever you do, enjoy being outside in this beautiful place we call home.

What’s Old is New Again in Garden Plants

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Pittosporum tobira fragrant flowers

I remember walking with the main horticulturalist at Filoli Garden many years ago and hearing her extol the virtues of the established plantings that have survived drought and neglect with no pest problems for a very long time and are still growing beautifully in the garden. It’s not always the latest cultivars that have staying power. Some of the newer varieties are better but some are not as vigorous, some of those lovely variegated, striped or dark foliage plants revert over the years, some are prone to pests and diseases. Don’t overlook using been-around-for-ages workhorse plants in your garden.

Some of the survivors at Filoli Gardens over the years are California natives and others are just tough plants from other parts of the world. Take the common pittosporum you see in most every old garden. This plant makes a fine hedge, focal point or ground cover depending on the genus with a sweet fragrance in the spring while providing the bones or structure to your garden.

All of the various types of pittosporum are hardy in winter, grow in sun or shade and have low water needs. Pittosporum tobira flowers are scented like orange blossoms. Pittosporum eugenoides and tenuifolium – commonly grown as a hedge or small tree – have highly fragrant blossoms as does the ground cover ‘Wheeler’s Dwarf’.

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Lithodora ‘Grace Ward’

On a recent trip to the Gig Harbor, Washington area, lithodora ‘Grace Ward’ caught my attention in many gardens. With those electric blue flowers covering this ground cover it’s quite the show stopper. Lithodora is used more extensively than creeping rosemary in the Pacific Northwest as it can survive temps down to 0 degree or less. Growing with only moderate to occasional irrigation give this plant a try in your own garden.

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Agapanthus africanus

Next plant on my bring-back-the-old-favorites list is the lowly agapanthus or Lily of the Nile.  Sure you see it at every fast food restaurant and hotel you pass but the reason is that it grows and blooms so reliably with little care. This is one plant where the new cultivars are proving to be just a tough as the standard agapanthus africanus.

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Agapanthus ‘Storm Cloud’

Agapanthus ‘Storm Cloud’ produces luxurious green foliage that tinges purple-red in the winter months. In summer large umbels of very deep blue flowers rise above the foliage on tall blackish stems. This variety takes a couple years to establish but blooms reliably from then on.

Two smaller types of agapanthus are ‘Queen Anne’, a semi-dwarf variety and the dwarf ’Peter Pan’. Both are available with blue or white flowers. There is also a variegated dwarf called ‘Tinkerbell’ which grows well also. All agapanthus tolerate frost and neglect and require only moderate watering.

So in addition to all the ceanothus- a California native- that grow so reliably don’t overlook some of these other workhorses. There’s a reason these plants have been grown successfully for such a long time. Be sure you include these old favorites in your garden along with those new cultivars that you just have to try out.

A Visit to the Brook Lomond Iris Farm

Aztec Sun
Aztec Sun

What do you get when you combine a world renowned pottery artist with a reformed corn grower? On California Street in Ben Lomond, the result is the Brook Lomond Iris Farm of Rick and Chris Moran. This fun, educational, inspiring couple recently invited me to admire this year’s crop of tall bearded iris grown with certified organic gardening practices as well as to share their organic vegetable garden, cactus and succulent collection and Chris’ unique pottery. They are getting ready for this year’s annual iris sale coming up April 30th as well as May 1st and 7th from 9:00-4:00 each day when the iris blooms will be at their peak.

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Coiled pottery by Chris Moran

Upon arriving my eyes were torn between the colorful beds of iris on my left and the blooming cactus and succulent collection displayed on the flagstone entry garden on the right. I later learned Chris cut and laid the flagstone herself. Inside the house Chris’s fabulous coiled pottery vases, urns and jugs in their great room were so amazing I had a hard time tearing myself away to start the tour of the back garden and iris beds in the front. Cody, their new dog, was good company as I learned how the Moran’s came to start an iris farm.

When Rick Moran was 13 years old he worked at LoPresti tomato farm in Connecticut. “I hated it,” he laughs. Later when he was a student at UCSC he used to pass by the Chadwick garden and says he “got the gardening bug by osmosis”. After graduation the couple moved to Bar Harbor Maine where they started a community garden. Chris displayed the cactus and succulents she had moved there in a heated porch which was quite the talk of the town for neighbors passing by on a snowy day.

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Organic vegetable garden

When they moved back to this area and found the sunny lot in Ben Lomond, Rick added nine yards of chicken manure mixed with rice hulls and planted corn. He had visions of savoring succulent ears of corn for dinner but quickly realized that the amount of water needed to grow corn was prohibitive. That was after the Chris’ succulent failure. He and Chris wanted to come up with a crop they could make a little supplemental income. She used to sell her cactus and succulents when they lived in Capitola at the drive-in in Santa Cruz many years before but after planting fancy succulents in the front yard and seeing them turn to mush in a Ben Lomond freeze they realized succulents weren’t going to work either.

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Stepping Out

Enter “The Queen of the Garden” as iris are called. The Morans researched these stunning flowers and found them to be drought tolerant and deer and gopher resistant. Having a high water table Iris are the perfect crop. They require no extra water at all with summer being the plant’s dormant season. Chris worked for the City of Santa Cruz for 25 years and started their Home Composing program. They compost all garden waste and kitchen scraps using the compost as the only fertilizer for the iris beds and vegetable garden. They get 15 wheelbarrows of compost a year from their simple bins. Straw is spread as mulch to control weeds between the iris beds’

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Tall bearded iris beds

The iris are starting their blooming cycle now. Some bloom earlier than others. By planting early, mid and late blooming varieties you can extend their colorful show for several months. Iris also make a good cut flower and many are fragrant. Chris told me that you can tell when an iris was hybridized from it’s shape. The early types are not as frilly as modern varieties. She pointed out a bed of Wabash Heritage which was first introduced in the 1920’s- simple with three falls. The lovely sky blue flowers of Striped Zebra iris smelled of Grape Koolaid. Chris explained that the flower scent develops as they sit in the sun. The aroma is not as strong when they first open.

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Bearded iris closeip

The Brook Lomond Iris Farm is located at 10310 California Drive off Highway 9 in Ben Lomond. Just look for the tall flags waving in the breeze and bring your camera. Iris rhizomes for sale are chosen for hardiness in this area and the Morans are always on the lookout and adding the newest varieties available such as the deep purple Dusky Challenger. The Iris Farm is educational as well as beautiful- a place the whole family will enjoy.

What Landscape Designers Grow in their own Gardens

alstroemeria_Inca-Ice.1600It probably won’t come as a big surprise to you that I have a lot of friends that are also landscape designers. We get together to talk plants, garden design challenges and plant problems while enjoying good food along with a little wine thrown in for good measure. Recently I had the opportunity to visit one of these friends and although I was only there briefly to pick up something I couldn’t help but ask about several of the beautiful plantain her own garden. Some of her favorites include those with interesting foliage and texture and that flower over a long season. Maybe some of these plant ideas will work in your own garden.

Being winter and all I was immediately drawn to the hundreds of soft apricot and creamy yellow flowers covering a 3 foot wide Peruvian Lily. This selection of alstroemeria, called Inca Ice, is much shorter and compact that the taller ones that can be somewhat floppy in the garden. Alstroemeria were named by Carl Linnaeus, often called the Father of Taxonomy, for his friend and student Klaus von Alstroemer. Native to South America, the summer growing types come from eastern Brazil while the winter growing plants are from central Chile.

Peruvian Lily spread slowly outward from rhizomes and grow in full to part sun. They are hardy to 15-20 degrees and can tolerate dry conditions although they look best with irrigation. The Inca series grows 2-3 ft tall and can be covered with flowers from spring to late fall or winter if the weather is mild. The flower stems are long enough for cutting. This variety also comes in light orchid, pale yellow and white with red and green markings. What’s not to love about this plant?

Tucked next to the blooming Inca Ice Peruvian Lily, a clump of bright, Festival_grass-leucodendron.1600burgundy red Festival grass complemented the soft yellow of a Leucodendron discolor and a variegated Flamingo Glow Beschorneria. I was not familiar with this variegated agave relative with its soft-tipped chartreuse striped leaves. I found out this beautiful plant is drought tolerant, hardy to 15 degrees and will bloom with 5 foot pink stalks with reddish pink bracts.

Other plants that boast more foliage color than flowers brought this winter garden to life. Several varieties of helleborus just starting to show pink, white and rose color were surrounded by the brilliant chartreuse-yellow foliage of sedum Angelina ground cover. A variegated Japanese Lily-of-the-Valley shrub grew nearby getting ready to bloom soon.

Beautiful bright pink, cream and green variegated Jester Leucodendron bordered the driveway. I’ve seen this plant also called Safari Sunshine in nurseries. With its smaller size of 4-5 feet this evergreen shrub has showy, rich red bracts that sit atop the branches now in late winter and lasting into spring. Drought tolerant like Safari Sunset and deer resistant, too, leaucodendron are hardier than other protea.

Every interesting garden has good bones. It has focal points, texture, repetition and unity among other elements. My friends garden is no exception. A lovely caramel colored New Zealand Wind Grass dominated another area allowing my eye to rest for a while. I wish they would quit renaming this plant that used to be stipa arundinacea but is now anemanthele lessoniana. The name doesn’t exactly roll off the tongue but the effect is beautiful in the garden. I’ve always called it Pheasant Tail grass but I could find no reference as to why this common name is used. Life used to be simple before DNA sequencing!

So if you’re in the mood to add a couple of interesting plants to your garden, take a tip from what a landscape designer grows in her own garden.

Treats & Tips for the September Garden

salvia_m_Hot-LipsYou can feel the weather changing as summer winds down. It’s more than just the passing of the Labor Day holiday and the school year starting. The nights are longer and cooler. The days are not quite so hot and the flowers in the garden seem brighter and more colorful. I look past the soft blue and lavender blossoms and am drawn to the warm shades of gold, rust, orange, hot pink and red. They shout autumn is on the way.

There’s nothing quite like adding a few new perennials to brighten up the garden. There are many that don’t require a lot of water after they become established. I recently visited a garden where the irrigation was reduced to the point that that most of the plants were barely hanging on. But there among the crispy plants were two Hot Lips salvia blooming as big as you please. This plant is popular for a reason. Hummingbirds, butterflies and bees love it and it blooms for a long time. It stays compact and is a great carefree shrub for water wise gardens.

Daisy flowers always bring a smile to my face. As members of the composite family they have echinacea_Wild_Berrya flat landing surface for butterflies to land on. Coneflowers are one of my favorites. When they start blooming in the early summer I enjoy them both in the garden and as cut flowers inside. Some have a slight fragrance. Hybridizers have introduced beautiful shades of gold, yellow, orange, burgundy and coral in addition to the traditional purple and pure white. Because they are dormant in the winter they are good candidates for the garden that has summer sun but winter shade. They are not attractive to deer and are good additions to the low water garden.

gaillardiaAnother perennial that blooms throughout summer and fall is gaillardia also known as blanket flower. I’ve seen this tough plant grow in neglected gardens that the owner swears does nothing to keep it going. They are covered with dozens of large reddish-orange flowers with yellow edging and bloom over a long period. This plant also attracts butterflies. You can start perennials from seed at this time of year for next year’s bloom.

Don’t overlook the color of other foliage plants like Orange Libertia, Abelia ‘Kaleidescope’, New Zealand flax, red fountain grass and Japanese bloodgrass in the garden.

Now through October, divide summer blooming perennials like agapanthus, coreopsis, daylily and penstemon that are overgrown and not flowering well. You can also divide spring blooming perennials like candytuft, columbine, astilbe, bergenia and bleeding heart but sometimes they don’t bloom the first spring afterwards due to the energy they use re-establishing themselves.

Another thing to do while out in the garden this month is to cut back berries vines that have produced fruit. Canes of the current season should be trained in their place.

Spider mites are especially prolific during hot, dry weather. Sometimes you don’t even know how bad the infestation is until all your leaves are pale with stippling. Periodically rinse dust and dirt off leaves with water. Spray the undersides of infected leaves with organics like insecticidal soap switching to neem oil if they build up a resistance to one of the pesticides.

Soon it will be time to start cool season veggies or plant cover crops in the garden. It’s never too soon to start planning for erosion control in those areas that caused you problems during last spring’s storms. But for now add some early fall color and have fun in the garden.