Euphorbia, one of the most striking plants for your garden, comes in a variety of heights, forms, colors, and habits. More than 2,000 species of herbaceous perennials, annuals, biennials, as well as evergreen and deciduous shrubs and trees, make up the large genus. Here in the Pacific Northwest, perennial plants come in a wide variety.
Perennial Euphorbias begin the show with a burst of blooms when winter gives way to spring. Long into May, the landscape is punctuated by fluffy spires of chartreuse, apple green, cream, or gold that are tinged with scarlet. Euphorbia ‘Excalibur’ sprang into color with its vivid foliage and golden blossoms as the evergreen Euphorbias started to fade.
From the 4-5′ E. characais ‘Wulfenii’ to the 12-18″ ground cover E. polychroma, spurges come in a range of sizes. These adaptable perennials can be used in borders, containers, mass plantings, rock gardens, and as a specimen plant. They are especially beneficial for hot, dry places because they are primarily evergreen and can withstand drought.
It’s crucial to know that when cut or broken, euphorbias exude a white sap. The skin and eyes are poisoned by this substance. When handling euphorbia, gloves should always be used. Euphorbia are resistant to deer because they are poisonous if consumed.
The whorled leaves of euphorbias, which range in hue from bluish-green to variegated green to dark bronze-purple, are prized for their beauty. Common perennial Euphorbias need a sunny spot with well-drained soil that is shielded from wind and freezing temperatures. Because of its dry summers, the Pacific Northwest has been compared to a Mediterranean environment and is a wonderful site to cultivate euphorbia. They go well with Gaillardia, Verbena, decorative grasses, and sedums.
It’s important to note that some euphorbia varieties self-seed profusely. Donkey tail spurge, Euphorbia myrsinites, reseeds so profusely that it is listed as an Oregon noxious weed and is therefore sold in Oregon nurseries.
Euphorbias change season?
A very broad plant genus called Euphorbia (Spurge) contains a wide variety of flowering plants in different colors and sizes. They include shrubs, trees, annuals, perennials, evergreens, and deciduous plants. The majority of euphorbias are low maintenance plants with excellent heat and drought tolerance that are incredibly beautiful, robust, and simple to manage. They always produce a lovely display in the garden and are perfect for beds, borders, or rock gardens.
Where would be the ideal location to plant a Euphorbia?
In general, euphorbias need a sunny location and rich, well-drained soil. Light types, meanwhile, can tolerate some shade and do well as ground cover around shrubs and trees.
How to plant euphorbias
Dig a deep hole when planting euphorbias that have been cultivated in pots and fill it with compost or leaf mould. Euphorbia should be planted firmly, then it should be watered well and mulched to keep moisture in and weeds out.
Here, Monty Don proposes two exceptional euphorbia species and provides planting instructions. Additionally, he offers advice on how to grow euphorbias from cuttings.
How to care for euphorbias
As long as the growing environment is favorable, euphorbias don’t need feeding or special care. After the blooms have faded, blooming stems should be pruned. However, gloves must always be used when working with euphorbias because their milky sap is hazardous if consumed and irritates the skin and eyes.
How to propagate euphorbias
Euphorbias can be grown by taking springtime cuttings. Wear gloves to protect your hands from the sap.
By collecting cuttings of Euphorbia characias subsp. wulfenii in the spring, you can learn how simple and gratifying euphorbia propagation is. Monty Don offers advice on how to maintain the cuttings’ viability, plant them, and shield your hands from the irritating sap:
Is Euphorbia winter-hardy?
My new succulents, which I planted in containers over the course of last summer, have practically turned to mush as a result of the most recent cold spell, Howard writes.
The succulents’ growing zones in my garden saw temperatures as low as 27 degrees Fahrenheit.
Do any succulents have the ability to withstand colder temperatures? What can I do going forward to prevent freezing damage to the plants? Additionally, do you have any helpful suggestions for extra growing techniques? I’m not prepared to give up on the “succulent challenge” just yet.
I spoke with Charolett Baron, an expert succulent and cactus aficionado, and I inquired about how her collection of succulents had fared through our abnormally cold conditions.
She also revealed some of the hard lessons she had to learn about cultivating succulents after she too lost some of her favorite specimens in a prior cycle of extremely cold temps.
Here are some of her tips for choosing succulents that can withstand freezing weather as well as what she does to safeguard her collection of succulents and cacti:
She has discovered that the agave, “After Glow,” is more tolerant of freezing temperatures and that the yucca, “Wall Bright Star,” is resilient to 0 degrees. These examples were discovered by Baron at Petaluma’s Cottage Gardens.
Specimens with variegation appear to be less robust. Frost is not tolerated by euphorbias. Despite the fact that they are supposedly hardy to, say, 30 degrees, container plants are more sensitive to lower temperatures.
Crassula sarcocaulis can withstand temperatures as low as 10. Hens and chicks, often known as sempervivums, can endure freezing temperatures. Stonecrops, commonly known as sedums, survive the freezing temperatures with little obvious damage.
Baron advises covering ALL of your succulent plants in breathable, frost-protective cloth that enables moisture and sunlight to pass through.
Although they must be removed during the day, thin sheets thrown over the plant in cold weather also works nicely.
Place the containers in sheltered spots like eaves. Wait until the weather warms up before going out on the water.
Run some low-voltage lights in your mini-greenhouse or bigger structure for added warmth, and keep the pots lightly covered in floating row covers—a frost-protective material—until no longer necessary.
Finally, her own succulent plants have survived because she covered them, including those in her greenhouse, in the ground, and in pots.
When the temperature dropped to 28 degrees, the sedums, sempervivums, Orostachys, Senecio mandraliscae, Crassula cocinea ‘Campfire,’ Rhodiela, and Aloe nobilis in my garden were unharmed.
Read the plant label before buying succulents because it will usually indicate whether or not the plant is cold-hardy. Some species within a given genus may be more resilient than others.
A protracted rainy period like the one we had will also reduce hardiness, as will the number of days with low temperatures.
The slightly more fragile succulent variety can be successfully grown by readers who live in a warmer area.
Surprisingly, visiting nearby neighbors who have had little to no plant frost damage will also assist you choose which succulents will do well in your own garden.
“Succulent Container Gardens, Design Eye-Catching Displays with 350 Easy-Care Plants” by Debra Lee Baldwin is a fantastic resource for all succulent fans.
This book provides answers to many queries regarding the cultural requirements of succulents, the hardiness of specific plants, and attractive container arrangements that use color, texture, and size that are appropriate for each container.
What distinguishes a yucca from an agave in terms of appearance, queries Cynthia?
Yuccas are mounding succulents that grow 2 to 3 feet tall and feature spiky foliage with stringy hairs along the margins. In the early or middle summer, they produce flowers on stalks.
Agaves grow in clumps and have leaves that are about 18 inches long, 3 inches wide, and have sharp, pointed points. Agaves, commonly referred to as century plants, don’t flower often, but when they do, it’s usually on stalks that extend several feet above the clump of foliage.
Is it acceptable to graft a citrus tree onto a camellia? asks Jess S. If it is not required, avoid removing the camellia’s root system.
Is Euphorbia a perennial plant?
In the fall, cut the entire plant back to the ground. After flowering, perennial herbaceous euphorbia require deadheading. Before the first frost, cut the plant back to the ground so that it won’t come back the following year.
When ought Euphorbia to be pruned?
Trim away any winter damage as soon as spring arrives. In order to prevent disease and pest infestation, it is a recommended grooming practice to remove dead and broken stems from the plant’s base. Some cultivars require the removal of all old growth at the base as they die to the ground each winter in order to reappear from the roots.
Only the tips of stems that sprouted the previous year are where the majority of euphorbia species bloom. Throughout the spring and summer, trim back euphorbia stems to their base right after bloom to ensure that the plant doesn’t become overloaded and produces flowers on a regular basis. Use clean hand pruners to cut off a blossoming stem at the base as it begins to turn yellow, and then compost the clippings. Pinch the tips of kinds that have a tendency to become lanky and flop over as they get taller when new stems emerge. Shorter stems are the consequence, which are better able to support blooms.
Are euphorbias contagious?
The ideal plant for growing beneath large trees is Euphorbia amygdaloides var. robbiae, one of the few species that grows in poor, dry soil in shadow. It grows through subterranean runners and finally forms a low carpet that smothers weeds. From spring to early summer, it produces erect spikes of lime green blooms in contrast to the dark glossy leaves. It serves as a good evergreen foil all year long for other shade-loving plants. It has received The Royal Horticultural Society’s esteemed Award of Garden Merit (AGM).
Grow Euphorbia amygdaloides var. robbiae in partially to completely shaded, well-drained soil. Trim back fading flower stems in the fall. Every spring, as part of routine border maintenance, remove undesirable seedlings.
Wear gloves whenever handling euphorbias. The creamy sap irritates the skin.
Euphorbias can reach what heights?
Growing conditions and plant size should be used as the primary selection criteria for euphorbia. The majority of euphorbias have green leaves and lime or acid yellow flowers that bloom in the early spring or in the early to mid summer, but there are a few options with burgundy (Eurphorbia amygdaloides ‘Purpurea’), blue (E. rigida and E. charcias subsp. wulfenii), or even variegated (such as E. characias ‘Tasmanian Tiger’
Check the plant label before you buy because habits and size can differ. They range in size from plants that are approximately 10 cm (4 in) tall and fit in the front of borders to those that are more than 1.8 m (6 ft) tall and fit in the back.
When deciding what euphorbia to put where, consider whether you can provide a sunny or shady position as well as how well the soil drains. In the garden, there is a euphorbia for almost any position. Here are some instances:
- For a sunny border that works with the majority of non-waterlogged garden soils: E. cornigera, E. donii, and E. schillingii ‘Amjillasa’
Euphorbias are they invasive?
Northern California is home to isolated occurrences of Euphorbia esula, which is displacing native plant species. Prairies, grasslands, and pine savannahs are just a few of the vegetation types it can invade and take over.
How cold are euphorbias tolerant of?
The majority of euphorbia species can withstand extreme heat and really prefer it when the average daytime temperature is around 80 degrees Fahrenheit. Each species has a different threshold for cold. Others don’t grow well in temperatures below around 55 degrees Fahrenheit, while some can tolerate a slight frost.
How does euphorbia survive the winter?
The sensitive perennial Euphorbia “Diamond Frost” is frequently used in pot and container displays. It can be planted in large groups for dramatic effect or alone to compliment other plants with its frothy foliage and flowers.
This dependable plant blooms for a very long time, from late spring until the first autumnal frosts. Additionally, it doesn’t require deadheading, and as the weather rises, you’ll discover that it is drought-tolerant.
Grow Euphorbia “Diamond Frost” in rich, moist, well-drained soil in either full sun or light shade for the greatest results. Either treat it like an annual and compost it once it has reached the end of its useful life, or overwinter it by relocating it to a bright, frost-free location.
How are euphorbias made bushy?
One of the uncommon succulents that can bloom for the majority of the year is the Crown of Thorns plant. It also happens to be one of the easiest plants to cultivate indoors because it likes warm environments just like humans do.
Its strong, thorny stems are covered in bright-green leaves. As a plant matures, its lower leaves will fall off naturally and won’t regrow. You can cut your plant back by half in the spring if it becomes too tall and lanky. It will splinter off as a result of this. This succulent will become bushy and lush because new stems will develop from where the pruning cuts were made below.
Its flowers are really bracts that endure for a few weeks and put on a consistent display of color for months. They come in vivid pink, salmon, peach, red, white, or yellow bracts.
More flowers, even bigger ones, are produced by modern hybrids than ever before. When they receive enough light, Crown of Thorns consistently bloom. Typically, spring and summer are the greatest times to see a lot of blossoms. With enough of bright light, you can, however, keep this peculiar succulent in bloom well into the fall.
Give the winter season to Crown of Thorns. The plant will develop more slowly in the fall because of the shorter daylight hours. During the winter, place your plant in a cooler location with sunlight and give it only occasional waterings. (See the instructions below for “Temperature” and “Water”).
They prefer slightly dry, sandy soil and are drought-tolerant and simple to grow. This succulent requires less watering than other house plants because it retains water in its thick stalks, just like a cactus. Reduce watering if the leaves turn yellow and drop off.
WARNING: When touching this plant, use strong gloves because the thorns are very sharp! Watch out for its milky, toxic sap as well, which can irritate your lips, eyes, and skin.