Category Archives: Design trends

Trees for Shade, Wildlife & the Future

Crape myrtles provide summer flowers and fall color.

We don’t plant enough trees. Everyone wants an instant garden but nature doesn’t work that way. When you look out from your windows into your landscaping what catches your eye first? I’ll bet the most majestic and inspiring sight in your garden is probably a tree that frames your house giving it a sense of permanence, welcoming you home and providing a haven for songbirds that serenade you on a summer day.

Large or small, trees make the world go round. They produce oxygen and act as a giant filter that cleans the air we breathe. A mature leafy tree produces as much oxygen in a season as 10 people inhale in a year.

Trees clean the soil by absorbing dangerous chemicals and other pollutants that have entered the soil. They can either store the harmful pollutants or actually change them into a less harmful form. Trees can filter sewage and clean the water that runs off into our streams. They can absorb and lock away carbon dioxide as wood so it is not available as greenhouse gasses.

If you live near a busy street trees can muffle the noise almost as effectively as a stone wall. They also act as a windbreak during windy and cold seasons reducing the drying effect of the wind and keeping it from blowing precious topsoil away.

Trees slow storm water runoff which helps recharge our aquifers. On top of all the beneficial things trees do for us they provide shade and keep us cool in the summer. In the winter they break up the wind reducing heating costs. Trees increase property values. If you’ve been thinking about adding a few trees to your own property here are some of my favorites. Some don’t get enough recognition others are classics. All make great additions to the garden.

I like Forest Pansy redbud for its stunning red foliage, Sango Kaku Japanese maple for its year round interest, Strawberry tree and Tristania laurina ‘Elegant’. Evergreen Dogwood (Cornus capitata) is also known as Himalayan flowering dogwood and lives up to its name in every respect. This variety is slow growing reaching 20 feet tall in sun or partial shade after about 25 years. After flowering, red fruit provides a treat for the birds.

To make your garden more compelling also consider planting a Ginkgo biloba ‘Autumn gold’ or Amelanchier ‘Autumn Brilliance’. Also called Apple Serviceberry it has edible small fruits you can use in jam and grows fast. Chinese Fringe Tree has magnificent clusters of fragrant, fringe-like blooms and is a terrific accent for small yards.

We are all familiar with the huge flowers in late winter of the Saucer magnolia. This beautiful tree also makes a good lawn tree. Oklahoma redbud takes heat and drought but can also tolerate regular garden watering. Chitalalpa ‘Pink Dawn’ grows 12 feet in three years then grows more slowly to 25 feet with a 25 foot spread. Its pink trumpet-shaped flowers are a welcome sight during the summer. Crape myrtle (lagerstroemia indica) also blooms at the same time providing your garden with color when you’re outdoors the most.

The fruitless Swan Hill olive combines beautifully with iceberg roses and rosemary in this garden.

Swan Hill olive produces no pollen or fruit, takes drought conditions and casts light shade. Chinese pistache provides brilliant fall color growing to 35 feet by 30 feet wide.

Plant a tree for yourself and for future generations.

How to Make your Garden More Sustainable

Yarrow (achillea millefolium) collects phosphorus, copper and potassium from the soil and brings it to the surface.

We all want to do the right thing for the environment by reducing our carbon footprint and becoming good stewards of the land. We want to build our landscapes with green products and incorporate sustainable practices in the garden. A good way to do this is to create gardens that offer food and beauty for people while providing habitat and other benefits for the rest of nature.

Permaculture is the fancy name for this approach to garden design. When you garden using organic fertilizers and organic pesticides you reduce pollution in the environment. When you plant edibles like fruits, vegetables and herbs in your yard, you create a more natural landscape that takes better care of itself while yielding a plentiful harvest of plants for food.

You can put these ideas to work in your own garden by using water more efficiently and carefully selecting and siting plants. Deep rooted trees like fig, mulberry, peach and plum help break up heavy soil and shade the plants beneath them. Planting drought tolerant trees creates shade which in turn slows the evaporation of moisture from soil and prevents erosion.

Group plants with similar water needs. Grow thirsty plants in the lowest areas of your garden where more water collects. You might install a rain garden in an areas like this. A rain garden is simply a planted depression designed to absorb run-off from areas like driveways, walkways, roofs and compacted lawn ares. The rain garden acts to replenish ground beds while preventing water from running into storm sewers, streams and creeks.

Bee’s Bliss salvia is a good low water use ground cover that shades the
soil and conserves moisture as does ceanothus ‘Heart’s Desire’.

Plant dry climate plants like lavender, rosemary and sage in open, sunny areas and drought tolerant ground covers like Bee’s Bliss salvia and ceanothus ‘Anchor Bay’ or ‘Heart’s Desire’ to shade the soil and conserve moisture. Use less turf grass and more walkable ground covers where possible.

Place hardy perennials like artichoke, butterfly bush and rhubarb under tree canopies to conserve moisture. In general, use deep-rooted, low maintenance perennials that provide food and also shade for plants underneath.

For food, plant fruit trees, berries, nuts, herbs and vegetables. To create habitat, plant fennel, spearmint and yarrow for beneficial insects; butterfly bush and sage for pollinators such as bees and hummingbirds, ceanothus and other native shrubs and trees for birds and other wildlife.

To improve soil structure, plant deep rooted plants to break up heavy soils and add organic matter. You can plant rhubarb, bear’s breech or other large leaf plants for a living mulch. Using wood based mulch on garden beds helps contain moisture in the soil, too. To provide soil with nitrogen, plant ceanothus, clover, legumes like beans, and peas and lupine. To supply minerals as compost or mulch plant chives, comfrey, garlic and yarrow. Yarrow is often planted in young orchards to bring nutrients near the top of the soil for young trees to use. S

Sustainable landscapes do not have to look like a weed patch. With a little planning your garden can be beautiful and productive.

Give A Hardy Geranium a Place in Your Garden

Geranium ‘Orion’

On my daily walk near the Boulder Creek Golf Course I see my neighbor has planted their partly shady bank with blue hardy geraniums. Already starting to bloom this large swath of color is going to be breathtaking very soon. True geraniums are becoming more popular. They are the work horses of the perennial border – hardy, versatile, long blooming plants for edgings, borders and ground covers.

Most people use the common name geranium to describe what is actually a pelargonium. Ivy geraniums, Martha Washington pelargoniums and zonal geraniums are all pelargoniums. Hardy geraniums, also called cranesbill, look very different. Leaves are roundish or kidney-shaped and usually lobed or deeply cut. Flower colors include beautiful blue, purple, magenta, pink or white and often completely cover the plant with color. I’ll bet if you visited a garden on a tour or admired a picture in a garden magazine it contained true geraniums. Here are just a few strong performers available among the dozens of species.

Blue flowers in the garden are always a hit as they combine so well with other colors. Geranium Orion’s abundant clear blue flower clusters bloom over a long season. Use this 2 foot spreading plant in sun or part shade in a mixed border or as a groundcover. There are other blue flowering geraniums. I use to grow geranium ‘Brookside’ in my own garden. It’s large bright blue flowers are larger than ‘Johnson’s Blue’. ‘Rozanne’ is another common favorite with stunning blue flowers.

Another fast growing variety is geranium incanum which covers itself spring through fall with rosy violet flowers. Cut back every 2-3 years to keep neat. This variety endures heat and drought better than other types but needs some summer water. It self sows profusely which might be exactly what you want as a groundcover in a problem area.

Geranium ‘Biokovo’

If pale pink is your color, plant geranium x cantabrigiense ’Biokova’. This excellent groundcover spreads slowly. The numerous one inch flowers are long lasting and cover the plant from late spring to early summer. Their soft pink color is indispensable when tying together stronger colors in the border and the lacy foliage is slightly scented.

Karmina geranium

Another geranium in the same family is ‘Karmina’. I’ve been using this deep rose flowering variety for several years in designs in areas that receive moderate irrigation. With lush green leaves on a low spreading plant it’s pretty even when not in bloom.

There are a couple other varieties that are popular and deserve a try. They are Award Winning Mavis Simpson’ and Russell Pritchard’. Both have bright pink or purple flowers and make good additions to your perennials.

Geranium maderense grows best in shade. This dramatic native of Madeira is the largest geranium with huge 1-2 foot long leaves shaped like giant snowflakes. Clusters of thousands of rose tinted flowers form on a 3 foot trunk. This perennial is short-lived but self sows freely. Add some of these architectural plants to your border for color and structure.

Give a hardy geranium a place in your garden.