There are various varieties of California lilac for use in landscaping. While some are low-growing, compact groundcovers that rarely grow higher than 6 inches (15 cm), others are upright bushes that reach heights of 8 or 9 feet (2 to 2.5 meters). The vivid to light blue flowers on evergreen plants with small to medium-sized glossy green leaves serve as a decorative accent. In addition to Oregon, California, and Washington, several species of California lilac can also be found as far away as Guatemala.
The Pacific Northwest is home to 12 different species of Ceanothus. For the greatest flowers, these plants demand dry soil and full sun. If you reside in a region where deer are present, protection is necessary because they enjoy California lilac particularly.
The lustrous foliage of ceanothus plants has three parallel leaf veins that give them their distinctive look. While smaller leafed shrubs have serrated, almost holly-like leaves, larger foliaged plants have whole margins.
One of the crucial characteristics of California lilac is its capacity to fix nitrogen in the soil, which benefits both home gardeners and the environment. The real star of the show are the flowers. While the majority have deep blue flowers in terminal clusters, certain varieties may have lighter blue, lavender, or even white flowers.
Does Oregon have good lilac growth?
Lilacs are bushes that resemble trees, but in April and May, they burst into color and scent, earning them a place among the riches of spring.
Lilacs, according to some, are the symbol of spring. No surprise. They can be a short joy, like a warm spring day in the Willamette Valley, with their strong fragrance and sprays of vibrant blooms. Only two to four weeks pass while the common lilac (Syringa vulgaris) is in full bloom. But according to Harold Greer of Greer Gardens, these tough, tree-like shrubs thrive in the Willamette Valley and their mid-spring burst of beauty and scent merit a place in the garden.
About 17 cultivars are offered in the Greer Gardens catalog, with bloom hues ranging from white to deep purple, yellow, and, well, lilac.
By growing a few different types, gardeners could even be able to extend the duration of lilac blooms, according to Greer. His favorites include “Sensation,” which has deep purple, single flowers with white edges, “Primrose,” which is the only known variety of pale yellow or cream, and “Miss Kim,” a Korean cultivar of Syringa pubescens that only reaches heights of 5 feet and a width of 5 feet. It has very fragrant single blossoms that bud deep purple and mature to an unusual icy blue.
According to Stephanie Scandlyn, retail manager at Bloomer’s Nursery in Eugene, lilacs are not difficult to grow. According to her, most will grow to be 8 to 10 feet tall and 6 to 8 feet wide. Therefore, it’s crucial to plant them with plenty of room. To blossom well, they will require well-drained soil and substantial amounts of daily sun.
Blight issues can arise in cold, wet springs, but Greer notes that nurseries are typically more at risk. A lilac is less vulnerable once it is large enough to plant in the garden, according to him. Lilacs can endure dry circumstances once established but require a lot of water while in bloom (approximately 1 inch per week).
Although many gardeners choose to buy and plant lilacs in the spring when they can see the flower color, Scandlyn advises that the optimum time to do so is in the fall. According to Scandlyn, Bloomer’s offers roughly seven different kinds, the majority of which are purple with some white. It will take two to three years for plants that are 2-3 feet tall when they are bought and planted to reestablish themselves and begin to blossom.
Only 30 minutes north of Portland, in Woodland, Washington, is a Northwest icon for lilac enthusiasts and budding gardeners. The Hulda Klager Lilac Gardens are a tribute to an extraordinary woman who started lilac hybridization on her ancestors’ farm in the early 1900s. According to volunteer Rebecca Roberts, the 4-acre property, a National Historic Landmark, organizes “Lilac Days” every year to showcase its 450 lilac bushes in a “garden fairyland.”
At the age of 2, Hulda Klager moved to Woodland with her family after leaving Germany. According to Roberts, she started breeding lilacs after Luther Burbank, eventually producing more than 100 different types. The Hulda Klager Lilac Society now cares for the historic home and gardens and carries on Klager’s 1920 practice of giving annual garden tours in order to protect her gardens and heritage.
Only during Lilac Days, which this year run from April 17 to May 9, may guests view the farmhouse, according to Roberts. The grounds are accessible all year long. Klager’s parents constructed the home in 1880, and it is in “fantastic shape,” according to her, with period furniture that include many of Klager’s personal belongings. The only time of year to visit the gift shop, which sells a number of the more popular, historically significant cultivars created by Klager, is during Lilac Days. The gardens’ and gift shop’s daily hours are 10 a.m. to 4 p.m.
Are lilacs indigenous to Oregon?
Origin: Of the roughly fifty species that are endemic to North America, about a dozen are indigenous to Oregon. (The common name is frequently referred to as California Lilac because many others are only indigenous to California.)
Ceanothus species include evergreen and deciduous varieties. The leaves of evergreen species are often tiny, rounded to oval, toothed, and slightly leathery in texture. They are also most often dark green. Deciduous species have larger, softer, rounder to oval, and slightly toothed leaves. Both flower species include attractive, occasionally fragrant clusters or sprays of small blooms that range in color from creamy white to electric blue.
Culture: Grows well-drained in full sun to light shade. prefers arid, lean soil. Most are so resistant to drought that they avoid summer water. These plants are susceptible to “killing with kindness,” and receiving too much water or fertilizer can drastically reduce their lifespan.
Ceanothus is susceptible to aphids, mealybugs, and scale, although is not regarded to be particularly susceptible to these pests. If given too much water in the summer or if the soil is not adequately drained, fungi diseases may develop. Give them the best growing conditions for an ideal lifespan because they are known to live for about 10 years on average.
Lulu may be found in Portland, Oregon.
These lilacs belong to your grandmother. One or two flower types, a wide range of hues, and heavenly scents are only a few advantages of French hybrids. Their challenges include a higher risk of contracting diseases, erratic habits, and foliage that ages by the end of summer.
You have to only care about the blossoms if you want to enjoy this plant. Violet, Blue, Purple, Magenta, Lilac, Pink, White, and Yellow are the color categories used to categorize flowers. They come in single form with only four petals, double, or clustered forms with eight or more petals. Portland often experiences bloom in late April or early May.
Are lilacs indigenous to the Northwest?
Another plant genus that has as many varieties of violet-blue flowers as Ceanothus is hard to imagine. Gardeners can choose from a number of species, although Ceanothus thyrsiflorus is the most popularly grown one (USDA Hardiness Zones 7-10). There are some that are indigenous to Oregon and the Pacific Northwest, but the majority are indigenous to California, where they are frequently referred to as California wild lilacs. These shrubs belong to the buckthorn family, as opposed to real lilacs, which are in the olive family (Oleaceae) (Rhamnaceae). Although different species and types have varied growth requirements, most will flourish once established in our climate in the Pacific Northwest with little care. Generally speaking, providing them with well-drained soil is essential.
Zones:
The majority of lilac types can withstand cold temperatures in zones 3 to 8, although others, like Scentara Double Blue, can (S. hyacinthiflora). There are some cultivars that don’t require a winter chill, like as “Lavender Lady” (S. vulgaris), which is heat tolerant to zone 9. The majority of others do need a wintertime period of cold and dormancy.
Height/Spread:
The common lilac, Syringa vulgaris, reaches heights of 12 to 15 feet and widths of 10 to 12 feet. The majority of dwarf types are smaller and reach maturity at 4 to 6 feet tall and 3 to 7 feet broad. Syringa reticulata, often known as the Japanese tree lilac, grows up to 30 feet tall.
Bloom Time:
The majority bloom in late May, however there are new re-blooming kinds, such the Bloomerang series, as well as early spring, mid-spring, and late-season blooming variants.
Color:
The common lilac (Syringa vulgaris) has gray to gray-brown bark, purple blooms, and dark gray-green to blue-green foliage (with no fall color change). But there are actually seven recognized hues for lilac flowers: white, violet, blue, lavender, pink, magenta, and purple, with several variations of each hue.
Other:
True lilacs, such as the California, mountain, and wild lilacs, are truly members of the genus Ceanothus. Butterfly bushes are frequently referred to as summer lilacs, especially sterile and non-invasive varieties.
Where should a lilac bush be planted?
When the lilacs begin to blossom, it is a solid indicator that spring has arrived for good. While many people only have a limited knowledge of common lilac (also known as French lilac) shrubs that can reach a height of 15 feet or more, there are now a lot more options available than there were fifty years ago. Some varieties that rebloom enhance the garden’s appeal the entire growing season.
How to Choose Lilacs
The common lilac is what you will most likely find when you go plant shopping. This traditional plant comes in a variety of cultivars and variations, each of which yields fragrant spring flowers in pink, purple, white, or even combinations of those hues. Common lilacs are typically the most fragrant variety of lilac and can grow to be rangy and large.
Rebloomers have arrived in the garden center thanks to recent introductions of hybrids between the common lilac and other shrub-type lilacs. Some of these more recent types are a little less fragrant, but they also tend to be smaller, bloom more frequently throughout the growing season, and have fewer powdery mildew issues.
The tree lilac is another common variety of lilac. It can grow to a height of around 20 feet and blooms with cream-colored flowers in the middle of the summer. Though it doesn’t require much trimming, keep in mind that the tree lilac is a tree, not a shrub.
Where to Plant Lilacs
Lilacs should be planted in full light (at least 6 to 8 hours per day), as too much shadow will prevent them from blooming. Lilacs also prefer moist, well-drained soil that is slightly alkaline.
When to Plant Lilacs
Before the ground freezes in the late fall is the ideal time to plant lilacs. After the earth thaws in the early spring, that is the next ideal period to plant. Lilacs will likely need to be planted as soon as you can locate them at the garden center, which is great; if you choose to do so during a warmer season, they might require additional watering.
How to Prepare the Soil for Planting Lilacs
A soil test should be performed prior to planting since lilacs thrive in slightly alkaline (6.5 to 7.0 pH), moist, well-drained soil that is high in organic matter. Lime must be added to raise the pH if it is below 5.5. It’s time to get the soil ready when you’ve obtained the ideal pH. Improve individual planting holes by mixing Miracle-Gro Garden Soil for Trees & Shrubs in a 50:50 ratio with the natural soil to give lilacs a nutrient-rich start. Iron and phosphorus are also present in this garden soil to promote root development and ward off leaf fading.
Are lilacs resistant to drought?
A traditional flower garden, outdoor space, or decorative pot should all contain lilac plants as they are a staple flowering shrub. Zones 3 through 8 are suitable for growing these fragrant shrubs, and they require very little maintenance. Lilacs need at least 6 hours per day of direct sunlight to produce their best flowers. Lilacs benefit from regular watering after initial planting, throughout active growth seasons (spring), and during prolonged dry spells. Lilacs are fairly drought tolerant once they are established.
It is advised to water your lilac plant once every 10 to 14 days from spring till blooming is finished. The ideal irrigation for lilacs is deep, infrequent watering. Make sure the planting space or container has good drainage. These plants don’t appreciate having their feet wet and won’t bloom if they are overwatered. By saturating air pockets with water and reducing soil oxygen levels, excessive water can strangle the lilac tree’s roots. The first indication that the lilac is overwatered is the plant wiggling.
Do lilacs prefer shade or the sun?
Full light and well-drained soil are ideal for lilac growth. Lilacs won’t flower well if they are cultivated in partial sunlight or shade. The bushes can live for hundreds of years after they have established themselves in a new location, even if it may take them three to four years to do so. The plant’s growth may be impacted by the soil pH (alkalinity or acidity of the soil). A slightly acidic to alkaline soil is ideal for lilac growth. Because of their frequent high acidity, New England soils may need to be modified for the greatest lilac growth.
Pruning the blooming stem back to a set of leaves each year will stop seed formation and ensure that there will be an abundance of flowers. Good flowering years may be followed by terrible years if this is not done. Winter trimming will get rid of flower buds since they are generated in the summer before they blossom.
Branch out any diseased, damaged, or dead wood. Renewing pruning is necessary for tall, lanky, and poorly flowering plants; for three years, cut around one-third of the oldest stems at ground level each year. This promotes the development of strong new stems from the base. The plant should have fully recovered after three years, with flowers growing back to nose height.
Despite how resilient lilacs are, they nevertheless require plenty of water as they grow. Lilacs prefer soil that is both moist and well-draining.
Powdery mildew fungus (Microsphaera alni), lilac borer (Podosesia syringae), and scale are the most problematic lilac issues in our region (oyster-shell scale, Lepidosaphes ulmi and prunicola scale, Pseudaulacaspis prunicola). The leaves appear to have pale streaks of powdery mildew on them. Even though it is ugly, it is rarely severe in our environment. In stems and larger branches, often one to two feet above ground level, borers leave 1/8-inch holes. A modest infestation may be disregarded, but more than a few borers require professional diagnosis and treatment. While prunicola scale covers bark with a dusty white mass, oyster-shell scale is appropriately named since the pests resemble 1/8-inch oyster shells on the stems. Control adult scale by chopping off branches that are extensively infested; control microscopic baby “crawlers” with a strong hose spray of water (use a hand lens to see scale). Summer oil and dormant oil both work well.