All posts by Jan Nelson

I am a landscape designer and consultant in the Santa Cruz mountains in California. I write a weekly gardening column for the Press Banner newspaper. I am also a Calif. Advanced Certified Nursery Professional and managed The Plantworks Nursery in Ben Lomond, Ca. for 20 years.

Succulents for the Santa Cruz Mtns

Earlier this year I had so many deer browsing in my garden, I thought the term "deer resistant" was a cruel joke. Don’t they read those lists anymore? My succulents, however, were never victims. If you haven’t paid much attention to these old standbys for a while, it’s time for another look.

There are succulents that thrive i shade as well as sun. That’s because they originate from many different environments. Many come from the deserts of the world while others developed in the cold, windy alpine regions of Europe in poor, rocky soil. A surprising number os succulent plants are native to the Rocky Mountains and Peruvian Andes. Still others evolved on the shores of salt water lakes and oceans where they adapted to high salt concentrations. Almost any environment is suitable for growing some kind of succulent, it merely depends on choosing the right one.

Many of the gardens in this area are frosty in the winter. The common winter hardy succulent varieties most resistant to cold are sedum, sempervivum, echeveria, crassula, agave, dudleya and yucca.

To ensure success when growing succulents, make sure your soil is fast draining. Our winter rains can rot even the toughest plants when their feet sit in soggy soil. Add sand and gravel to your soil or plant on mounds to increase drainage.

Sempervivum and echeveria, both low growing ground covers, are also known as hens-and-chicks. They spread by producing identical offsets that surround the mother plant like chicks. Due to extensive breeding you can choose from more than 4,000 named varieties. Some are tightly clustered, others more open with smooth or velvety leaves in shades ranging from near black to pinks, purples, lavender, apricot and every shade of green. A metallic sheen glints off the leaves of some types, while others like Silver King and Red Ruben have leaves outlined in fuzzy, white hairs. The colors change through the seasons and in summer, starlike flowers bloom atop fat, tall stems.

While the distinct rosette forms of hens & chicks are easily recognizable, in their shape and colors. Low growing varieties include sedum makinoi Ogon, on my my favorites, for their tiny carpet-like golden foliage. Coppertone grows 12" tall with thick coppery colored leaves. Sedum tricolor makes a nice ground cover in sunny areas. Sedum Autumn Joy’s rosy pink flower clusters look beautiful in large swaths combined with pheasant tail grass and Santa Barbara daisy.

There are many other sedums to choose from that do well in our area. All are reliable perennials in our climate. They will not take foot traffic but are otherwise tough, low maintenance plants.

Succulents can be used in so many ways in the garden. Use them in pots or in the front of the border where they provide texture. They can be used to fill in between shrubs or clumps of perennials.

Every garden has a problem spot- one that is too hot, too dry, awkward or shallow for other plants. That’s where succulents come to the rescue.

Help Bees Help You

Bees are getting a lot of press lately, Most fruits and vegetables, except crops like corn, wheat, tomatoes, peppers, eggplant, beans and beets, need bees to pollinate them. Of the 3 million hives in this country about 600,000 have disappeared. Our bees are at risk and research has not found the smoking gun for colony collapse disorder ( where bees leave the hive and mysteriously never return ). In the 1980’s a mite caused a huge die off but now researchers are looking to a virus from Israel that might causing a decline in the bee’s immune system, like AIDS for bees. Pesticide are also contributing to the decline. Maybe these interfere with the bees ability to find their way home. It may be that there are several reasons that are causing our bees to be at risk.

What can we do to help?  For one, we can attract native bees to the garden. Native bees are solitary, meaning they do not make a hive but make nests underground, one female per nesting hole, where she lays her eggs. Some of the things we do in our gardens, such as mulching, is good for the soil and deterring weeds but not helpful for ground nesting bees.  The key is to leave some unmulched sections near your flowering plants for them to burrow.

Native bees won’t sting you. It’s not that they don’t have a stinger, they just don’t use them on people. Also most of our 1,600 species of native bees are too small to be able to sting.  Native bees are solely responsible for keeping many native plants pollinated. To help bees and other pollinator insects—like butterflies—you should provide a range of plants that will offer a succession of flowers, and thus, through the whole growing season. Choose several colors and shapes of flowers, plant flowers in clumps and plant where bees will visit- in sunny spots sheltered from strong winds.

Native bees love Ray Hartman ceanothus and toyon, for instance. Also ribes, sambucus, penstemon, echinacea, sedum, salvia, Ca. poppy, buckwheat, willow, sunflowers, lavender, basil, agastache, marjorum, rosemary, erysimum, zinnia and aster.

All species of bees will benefit from these tips.  Let’s lend a helping hand to these vital pollinators.

Zucchini pollination

How can I help you? Welcoming words to a troubled gardener. As summer marches on, I’m regularly asked about problems that crop up in the garden. Here are some tips and advice for situations you also may be encountering.

Zucchini squash, that fasted growing and most prolific of all summer squash, has many uses. Rather than bribe neighbors to take your giant zucchini, check the plants often and harvest them when small – the size of your finger . The flesh of these gourmet delicacies is soft and sweet at this stage.

Zucchini, as with all summer squashes and winter squash such as pumpkins, bear two kinds of flowers on the same plant. The female flower contains the ovary that will develop into the fruit itself. For every female flower, there are at least three male flowers which produce the pollen. Bees do the job of carrying pollen from the male to the female flowers. That’s why it’s important to plant flowers and shrubs that attract bees. Remember not to use pesticides ,even organic neem oil and spinosad , when bees are present.

After the female flower has faded and begins to form fruit, the role of the male flower is over. Your zucchini plant may end up with lots of excess male flowers that are edible and can be prepared in a variety of delicious ways. You may have heard of squash blossom soup or baked stuffed squash blossoms but if you go for simple recipes try making quesadillas.

After cutting the stem from the bottom of the blossoms, spread several in a single layer over half of a large flour tortilla. Top with mozzarella or your favorite cheese, fold the tortilla over and let it heat gradually and both sides. When the cheese is fully melted and the blossom have collapsed, your culinary delight is ready.
 

How to Plant a Vignette in your Garden

Most people want to do the right thing, they just don’t always know what it is- in the garden, anyway. Often when I visit a garden to help with the design, I find lots of great plants scattered about that just need to find the right spot to call home and something to tie them together.

We all do it – over the years buying plants we just have to have with no plan of where they might be used effectively. The garden becomes a collection of mismatched plants and that dramatic border you’ve envisioned just don’t come together.

Where to begin? Picture sections of the garden as separate scenes composed of small groups of plants that look good together because of their complementary and contrasting features.

Start with a strong foliage plant, then add other plants with interesting textures, forms and colors to complete the scene. Don’t simply alternate textures because that could make the garden look too controlled and predictable. Sometimes repeating a bold, course texture makes the planting restful.

Select the first plant in a vignette for its foliage. Because it serves as the main plant, it has to have leaves that look clean year round or from the time they emerge in spring until fall. Avoid plants that become discolored or tattered as the season progresses from weather, disease or pests. You can discover reliable foliage plants by observing other gardens, especially in late summer.

Examples of strong anchor foliage plants for shade include Japanese maple, hydrangeas, dogwood, pieris japonica, camellia, aucuba, rhododendron, ribes sanguineum and viburnum,. Good plants to anchor a sunny garden vignette would be butterfly bush, a tall grass like miscanthus sinensis Morning Light, ceanothus Concha, rockrose, western redbud, bush anemone Japanese barberry and lavatera.

Select supporting plants to balance the main plant in your grouping. Vary the shapes of these secondary plants to create interesting compositions. Too many plant like iris, daylilies or liriope with swordlike leaves, for instance,  would create vertical chaos. You can use one but no more than two plants to add vertical emphasis. Also using more fine-textured plants than course, large-leaved plants seems to work better. Shady medium-sized plants might include hardy geraniums, hosta, carex Evergold, ligularia, coral bells, Pacific coast iris and western sword fern. Good supporting plants for sun include salvia, penstemon, rudbeckia, yarrow, artemisia, eriogonum, blue oat grass and society garlic.

Groundcovers finish a vignette. Look for color cues from your first foliage plant and choose a low grower that complements it. Color can connect plants that differ greatly in form and color. Think of groundcovers as carpeting for your garden. Golden creeping Jenny and lamium Pink Pewter are good choices for a shady area while elfin thyme and dymondia would tie together a group in the sun.

Don’t be afraid to move a plant that is not working where its growing now. Make a note in your journal reminding yourself to transplant it sometime in the fall. Gardening is a dynamic and fluid process. Enjoy piecing  together pieces of the puzzle.
 

Orange and Peach color in the Garden

Enjoying a spectacular sunset on a warm evening in the summertime is one of life’s simple pleasures. Peach and orange tones bounce off the bottom of gauzy cirrus clouds as they streak across the sky. Combine these warm colors with varying shades of blue sky and you have he perfect color combo –opposites on the color wheel. We can’t help but ooh and aah,? we have an emotional response to this particular pairing of colors.

If you don’t have a vignette or section of your garden with peach, orange and blue yet, now’s the time to create one. All the tints and tones of orange warm and cheer up our gardens, no matter what the weather. And orange flowers set off every color of foliage, from blue-gray to lime to copper.

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Canna ‘Pretoria’

Here’s a short list of my favorite peach and orange flowers and foliage:
???? Orange hummingbird mint ( agastache aurantiaca ) a drought tolerant, summer-blooming favorite of hummingbirds.
???? Crocosmia – an old garden favorite with long blooming flower spikes that make good cut flowers.
???? Kangaroo paw Tequila Sunrise ( anigozanthus ) – another long blooming hummingbird favorite
???? Canna Pretoria – beautiful variegated gold foliage and orange flowers make this perennial a classic
???? Yarrow Terra Cotta ( achillea millefolium ) – drought tolerant, carefree, generously blooming perennial attractive to both butterflies and their larvae
???? Flowering Maple Tangerine( abutilon )- favorite year-round bloomer of both hummingbirds and yours truly.
???? Fuschia gartenmeister – the orange fuchsia that needs no cleaning. May still be blooming at Christmas time for your hummers.
???? Orange New Zealand sedge ( carex testacea ) – widely arching clumps of beautiful rusty grass

Other inspiring orange flowers your sure to want in your garden are calibrachoa Sunrise or Terra Cotta, gazania, lantana, dahlia, coprosma Evening Glow, orange tuberous begonias and orange daylilies

Combine with blue flowers, stir well and stand back to enjoy your own garden sunset.

 

Fast Growing Trees for Shade

Midsummer heat can be brutal. Without shade from trees, the sun can turn a garden from an oasis into a spot not fit for man or beast.  If you need to plant a tree that grows really fast and will provide shade quickly consider one of the following. They’ll sprout 2-4 feet in a single year with good care.

Tropical looking trees not only provide shade but have a look of coolness about them. Their large leaves ripple in the slightest breeze and beg you to enjoy an icy beverage below their canopy. Catalpa’s are among the few hardy deciduous trees that can complete in flower and leaf with subtropical species. Purple Catalpa has all the bells and whistles. Their huge heart-shaped leaves are 10-12 inches long. Young leaves emerge deep blackish-purple, then turn purple-toned green in summer. Large upright clusters of trumpet-shaped 2" wide pure white flowers are lightly speckled with yellow and purple and bloom in late spring and summer. This tree grows 30-40 feet in sun or light shade and needs moderate water.

What do you get when you cross a catalpa with a chilopsis tree from the desert? You get a  Chitalpa – a rapid growing 20-30 ft. tree that combines toughness with beauty. From late spring through fall, clusters of frilly, trumpet-shaped pink or white flowers appear. Chitalpa’s like full sun and need only little to moderate water.

If you want a good lawn tree that casts light shade, I have two suggestions:  Silk Tree and Golden Honey locust. Albizia – aka Silk tree- aka Mimosa grows fast to 40 ft. tall with a wide canopy. Often it is kept pruned to 15 or 20 ft so it’s pretty powder pink flowers that appear in summer can be enjoyed up close. Birds are also attracted to the flower clusters. Silk trees are especially beautiful when viewed fro an upper deck or window.

Golden Honey locust has beautiful fern-like golden-yellow new foliage which is showy against the deep green of the more mature leaves. Foliage casts filtered shade allowing growth of lawn or other plants beneath its canopy. Fast growing to 35-70 ft. This variety has few or o seed pods and is thornless.

California pepper trees are beautiful in the right spot with gnarled trunks and light, graceful branchlets. Give them room to spread away from paving and other plants. This is a great tree to shade a play area or gravel patio. Fast growth to 25-40 ft. This tree requires little to moderate water.
 
Other fast growing trees are Raywood ash, Evergreen ash, Purple Robe locust and Chinese evergreen elm.

Remember, most trees grow fast when young, then slow down as they mature. Encourage this growth spurt with deep watering and regular fertilizing.