
Most delphiniums Delphinium is a genus of about 300 species of perennial flowering plants in the family Ranunculaceae, native throughout the Northern Hemisphere and also on the high mountains of tropical Africa. The genus was erected by Carl Linnaeus.Delphinium
What do delphiniums look like in the garden?
The plant opens tall flower spikes packed with deep blue florets. The white center is known in delphinium talk as a “bee.” Cobalt Dreams grows 4 to 6 feet tall and is hardy in Zones 3-7. Seeing a bed of delphiniums can inspire anyone to garden. These stately plants tower over other bloomers, true aristocrats of the garden.
What kind of delphinium is blue with purple flowers?
Delphinium elatum 'King Arthur' is one of the Round Table Hybrids with 5- to 6-foot-tall flower spikes. It has reddish-purple flowers with a creamy white center, called a bee. 'Dasante Blue' delphinium. Delphinium elatum 'Dasante Blue' is a compact selection with rich blue flowers with light purple tones.
How tall do Delphinium elatum grow?
Delphinium elatum 'King Arthur' is one of the Round Table Hybrids with 5- to 6-foot-tall flower spikes. It has reddish-purple flowers with a creamy white centers, called a bee. Zones 3-7 Delphinium elatum 'Dasante Blue' is a compact selection with rich blue flowers with light purple tones. It grows 34 inches tall and 12 inches wide. Zones 4-7
How tall do delphiniums grow in Zone 7?
Zones 4-7 Delphinium elatum Pacific Giants Series are towering plants with bloom stalks reaching up to 7 feet tall. Colors range from light blue to white, pink, and purple. Zones 3-7 Delphinium grandiflorum 'Summer Blues' offers soft blue flowers in summer. It grows 14 inches tall. Zones 4-7

Does delphinium come back every year?
Delphiniums are herbaceous perennial flowers—meaning that they die back every fall and winter, but their roots remain alive and regrow the plant every spring and summer.
Do delphiniums like sun or shade?
Delphiniums should be planted in an area that receives 6 to 8 hours of sun per day, preferably morning sun. They need shelter from strong winds and rain downpours to avoid damage to the tall flower stalks. Standing water causes crown and root rot, so a well-drained site is a must.
How poisonous are delphiniums?
The delphinium, more commonly called larkspur, is a beautiful and tall flowering plant with toxic amounts of diterpene alkaloids that can cause serious neuromuscular effects in dogs, other animals, and even humans. In fact, just two milligrams of the plant is enough to kill an adult human.
Where do delphiniums grow best?
full sunWhere to grow delphiniums. For best results grow delphiniums in moist but well-drained soil in full sun. Delphiniums are tall plants, so do best at the back of a sunny border. Avoid windy spots, as wind can blow the plants over.
How many years do delphiniums last?
2-3 yearsUnfortunately, delphiniums have an average lifespan of 2-3 years at most.
Is it OK to touch delphinium?
This toxic plant is dangerous, especially the younger parts of the plant. If consumed by humans, it will cause severe digestive issues, and if touched, it can cause severe skin irritation. All parts of the plant contain poisonous chemicals, including various diterpenoid alkaloids like methyllycaconitine.
Do you cut back delphinium?
Cutting back after flowering Early-flowering perennials such as geraniums and delphiniums are cut to near ground level after flowering to encourage fresh foliage and late summer flowering. These are then cut back again in autumn or spring.
What animal eats delphinium leaves?
Leaves of Zinnias, Delphiniums, and many more, and the centers of Coneflowers, fall victim to caterpillars.
Are dogs attracted to delphinium?
Delphinium might be beautiful, but it's a no-no for dogs. In the past we've covered what you can plant to make your four-legged friends happy, but there are certain plants you should never have in your garden if you have a dog– especially if you have one who likes to graze.
What month do you plant delphiniums?
Plant delphiniums in borders and containers in spring and early summer, as they become available in garden centres. However, you can plant any time as long as you water in dry spells and don't plant when the soil/compost is waterlogged or frozen.
Do slugs eat delphiniums?
Hostas, delphiniums, dahlias, gerberas, sweet peas and tulips are regularly attacked by slugs, and it can be difficult to grow these plants if you have a big slug problem. In the vegetable garden peas, beans, lettuce, celery and potato tubers are often damaged.
Are delphiniums invasive?
Delphiniums are not invasive and in fact, may be planted in place of actually invasive plants such as purple loosestrife.
How do you keep delphiniums blooming?
To keep your delphiniums blooming, you'll need to cut the main stalk once the flower petals start to fall off. Then, fertilize the soil and water the remaining side shoots. Pruning your delphiniums can help them bloom all summer long, and it'll also give you some lovely cut flowers for your home.
Do delphiniums grow well in shade?
planting out delphiniums Choose a site in full sun or dappled shade. Delphiniums need well-drained soil so add plenty of grit to heavy soils to help with drainage. If delphiniums sit wet in their dormant winter season, they can die, so make sure you prevent this with good drainage.
Should you deadhead delphiniums?
Fork it into the soil and water the plants well to encourage a second burst of flowering, though usually with fewer blooms, in late summer or early fall. You should also deadhead single-stem delphiniums once all the blooms have faded.
Do you cut back delphiniums after flowering?
Cutting back after flowering Early-flowering perennials such as geraniums and delphiniums are cut to near ground level after flowering to encourage fresh foliage and late summer flowering. These are then cut back again in autumn or spring.
What color are delphiniums?
Most delphiniums are in the blue and purple range, but they can also be found in pinks and reds. There are some stunning coral-colored varieties, and even some rare ones in yellow. These plants have attractive foliage in a pleasing green, with palm-shaped leaves like a fern.
How tall does a delphinium grow?
These elegant plants add a strong vertical element. Because some varieties can grow up to 6 feet tall, plant these at the back of a garden border.
How tall does Delphinium Grandiflorum grow?
Delphinium grandiflorum 'Blue Butterfly' grows to only 14 inches tall and has deep blue flowers with a hint of purple. It tolerates heat better than other delphiniums, blooming through most of the summer. Zones 4-7
Why do delphiniums need full sun?
Ideally, delphiniums should be planted in full sun for the best blooms and sturdiest stems. In too much shade, especially in humid climates, fungus issues can arise on the foliage.
Do you deadhead a tall plant?
Because these plants are tall, they often need staking or support from neighboring plants. Once their blooms are finished, deadhead them, because you can usually get a small second bloom after.
Do delphiniums like hot summers?
One of the most important things to keep in mind is that delphiniums don't like hot summers; they perform best in mild weather. When it does get hot, plants can melt out and die back to the ground.
How tall do delphiniums grow?
There are dwarf-sized delphiniums and medium-sized as well as tall ones (growing up to 6 feet and higher).
What is a delphinium?
Delphiniums are perennials grown for their showy spikes of colorful summer flowers in gorgeous shades of blue, pink, white, and purple. They are popular in cottage-style gardens and cutting gardens. Delphiniums are a favorite of many gardeners, but can sometimes be a challenge.
How to deadhead delphiniums?
Deadhead by cutting spent flower spikes back to small, flowering side shoots. After delphiniums have finished blooming, cut flower stalks to the ground, and new, though smaller, flower stalks will develop. The flowers will survive the coming cold days and even light frosts. ( See local frost dates .)
How to deadhead a flower spike?
Deadhead by cutting spent flower spikes back to small, flowering side shoots.
How tall are King Arthur's plums?
‘King Arthur’ bears plum flowers with white bees with 5- to 6-foot tall flower spikes.
What does shiny residue on leaves mean?
A shiny residue on leaves could indicate that slugs or aphids are present. Check out our pest pages for information about dealing with them!
When to insert supports for delphiniums?
Insert supports no later than midspring or when the plants reach 12 inches high. Stake the low-growing perennials with twiggy, brushwood support. The taller, large-flowered delphiniums need sturdy stakes.
How tall is a delphinium?
In total, there are over 400 kinds of delphiniums that grow in this country, and the blooms often tower above the plant, which is often 7 feet tall.
How tall does Delphinium Galahad grow?
It has snow-white blooms and dark green leave that stand out. The plant needs full sun exposure to do well and soil that is moderately moist and drains well. It grows to be 4 to 6 feet tall.
What kind of soil does Delphinium Highlander Bolero like?
It will grow best in sandy or loamy soil and full sun. 7. Delphinium Highlander Bolero. The ‘highlander bolero’ is a variety of this plant that has pom-pom flowers that bloom during the summer. These are unique blooms with petals that are white towards the center with dark blue-purple fringes along the outside.
How tall does Delphinium Magic Fountain Lavender grow?
If lavender blooms will make an ideal match for your garden, consider this variation as an option. It is a short plant that only grows to be about 3 feet tall, which makes it perfect for a small garden. It’s a very low maintenance plant that will attract hummingbirds easily.
What is Delphinium Astolat?
Delphinium Astolat Group. This is a group of Pacific Giant hybrids that are tall and sturdy. Typically, these plants have semi-double blooms that are pink or lavender in color. The flowers will bloom from early to midsummer and will attract hummingbirds and butterflies.
How tall does a periwinkle plant grow?
Each bloom has a white center that gives it some contrast. Growing to be 6 feet tall, this plant needs full sun and loamy or sandy soil to thrive. It also brings pollinators to your garden.
How big does a Delphinium Jill Curley grow?
The semi-double flowers are approximately three inches in diameter, and the entire plant will grow to be between 6 and 7 feet.
How much sun does a delphinium need?
Delphinium plants require 6 to 8 hours of sun a day, and gentle morning and early afternoon sun is preferred. The roots need cool, moist shade.
What are the pollinators of Delphinium?
Delphiniums attract pollinators such as bees, butterflies and hummingbirds; resistant to deer and rabbits.
How tall is a dwarves?
Varies by type. The tallest varieties are found within the Delphinium elatum group, with stalks regularly 5 to 6 feet tall (with some reaching 8 feet) and a spread of 2 feet. The D. belladonna group averages 3 to 4 feet tall with a spread of 2 feet. Dwarf varieties, like D. grandiflorum, range 1 to 2-feet tall and 12 to 18 inches wide.
How tall is a D. belladonna?
The D. belladonna group averages 3 to 4 feet tall with a spread of 2 feet. Dwarf varieties, like D. grandiflorum, range 1 to 2-feet tall and 12 to 18 inches wide.
What diseases do delphiniums get?
Delphiniums are susceptible to a host of diseases including powdery mildew, Southern blight, bacterial and fungal spots, gray mold, crown and root rot, rust and others. Planting your delphiniums in a well-ventilated area and keeping the foliage dry will go a long way in preventing disease.
How tall does a grandiflorum grow?
Grandiflorum Group: Also called Chinese or Siberian delphinium, this variety has a compact, bushy habit and grows 1 to 2 feet tall and nearly as wide. Grandiflorums bloom blue or white flowers mid-summer and tend to have a higher heat tolerance than other delphinium species.
How to thin out a new plant?
For best flowering, new plants should be thinned to 2 to 3 good shoots when they are 3 inches high. Established plants can be thinned to 5 to 7 of the best shoots. Cut the main stalk down after flowering to the level of its smaller side shoots, which will bloom secondarily with slightly smaller flowers. To encourage a second, but smaller, bloom in late summer or early autumn, cut the stalks to the ground just after flowering. Prune the entire plant to the ground after it wilts in autumn.
What is the color of delphinium?
Traditionally delphinium delivers gardening's most elusive hue — true blue — but it also unfurls a range of flower colors, including purple, white, pink, lavender and lovely bicolor blends.
Where do delphiniums grow?
Delphiniums like a frosty winter. They're native to the northern hemisphere and higher elevations of mountain regions in Africa. To germinate, their seeds need a period of cold in winter that delivers near or below freezing temperatures. In general, delphinums are perennial in zones 3 to 7 and don't thrive in regions with constant heat.
How to grow delphiniums from seed?
The trick is to provide moist cold or stratification. Tuck seeds into a damp paper towel in a plastic bag, and stash it in the fridge for 24 to 36 hours.
How tall does Cobalt Dreams grow?
The white center is known in delphinium talk as a “bee.”. Cobalt Dreams grows 4 to 6 feet tall and is hardy in Zones 3-7. Photo by: Walters Gardens at PerennialResource.com. Walters Gardens at PerennialResource.com. Seeing a bed of delphiniums can inspire anyone to garden.
How long does it take for delphinium seeds to germinate?
Stash this in the fridge for 24 to 36 hours. If seeds start to germinate on the moist surface, just cut them apart and plant the seed and the towel (which will decompose).
What stakes do delphiniums use?
A grow-through hoop stake works well with delphiniums. As stems grow, they pass through the hoops, which provide support for the stems.
How tall do mini stars grow?
‘Mini Stars’ Delphinium. ‘Mini Stars’ delphinium is a dwarf type, with plants growing 18 to 30 inches tall. The shorter stature means plants typically don’t need staking, except possibly in the windiest locations.
What flowers do delphiniums produce?
They produce spikes of stunning small flowers in blue, deep indigo, violent, pink, and white. Delphinium is popular for cut flowers and cottage style gardens, but they do require a good deal of work. If you’re prepared to put in the time, start with seeds.
How long does it take for Delphinium to grow?
Delphinium seed planting should lead to seedlings in about three weeks. Make sure they get plenty of light at this point if indoors. The seedlings should have two or more pairs of true leaves before they are transplanted outdoors.
How to grow delphinium indoors?
Whether you’re sowing delphinium indoors or out, cover the seeds with about an eighth of an inch (one-third cm.) of soil. Keep the soil moist and at a temperature of about 70 to 75 degrees F. (21-24 C.).
Can you grow delphinium from seed?
Growing Delphiniums from Seed. Delphinium plants are known for being high maintenance, but they reward you with stunning flowers. Knowing how and when to sow delphinium seeds will set you on the right path to growing tall, healthy, flowering plants.

Cultivation
Risks
- Plant delphiniums in humus-rich, well-drained, organic soils. While it's important to keep the plants consistently moist (they don't handle drought well), be sure that the soil has proper drainage. Standing water can lead to crown rot, which causes the whole base of the plant to rot, which will eventually lead to death.
Management
- Ideally, delphiniums should be planted in full sun for the best blooms and sturdiest stems. In too much shade, especially in humid climates, foliage fungus issues can arise. Powdery mildew, botrytis, and leaf spot are all common problems that delphiniums deal with. The best fungal control method is prevention, so make sure plants are in well-ventilated areas and full sun to kee…
Varieties
- Delphinium elatum 'King Arthur' is one of the Round Table Hybrids with 5- to 6-foot-tall flower spikes. It has reddish-purple flowers with a creamy white center, called a bee. Zones 3-7 Delphinium elatum 'Dasante Blue' is a compact selection with rich blue flowers with light purple tones. It grows 34 inches tall and 12 inches wide. Zones 4-7
Description
- Delphinium elatum Pacific Giants Series are towering plants with bloom stalks reaching up to 7 feet tall. Colors range from light blue to white, pink, and purple. Zones 3-7
Types
- There are hundreds of different types of salvias, commonly called sage. They all tend to share beautiful, tall flower spikes and attractive, often gray-green leaves. Countless sages (including the herb used in cooking) are available to decorate ornamental gardens, and new selections appear annually. They are valued for their very long season of bloom, right up until frost. All are not hard…