Big, bigger, the biggest: Grow one of these flowers in your yard.
Plus, many of these bigger blooms also make beautiful cut flower bouquets.
Here are 20perennials, annuals,shrubs, and trees with large flowers for a wide range ofhardiness zones.
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‘Mammoth’ is an heirloom variety that reliably produces 12-inch flower heads packed with oil-rich seeds.
‘Sunzilla’ is a hybrid bred to grow a sturdy 16-foot stalk capable of supporting the giant blooms.
Although sunflowers are drought-tolerant, constant moisture and rich soil will yield the largest flowers.
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Hydrangea
In the world of hydrangea hybridizing, the big blooms just keep getting better.
In addition to the cultivars ofH.
aborescens, varieties ofH.
The Spruce / Gyscha Rendy
macrophylla, H. serrata, H. paniculata,andH.
quercifoliaare all known for their impressive blooms.
A sheltered site with some shade will help your hydrangeas shine throughout the growing season.
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Oriental poppies bloom in late spring to early summer.
Blooms more than 7 inches in diameter are not unheard of, often with coal-black centers.
To pamper your poppies, give them full sun and excellent drainage.
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The 4- to 7-foot tall plants are best planted in the back of a border.
The plants need staking to protect heavy flower spikes from getting knocked over by the wind.
Delphiniums, also called larkspur, are toxic to humans and animals.
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Fireworks Clematis
T. I.
It belongs to Group 2 of clematis.
The bright purple flowers have a reddish-pink central bar.
T. I. / 500px / Getty Images
Clematis is toxic to humans and animals.
Deeply divided foliage adds to the character of these plants.
Hardy Hibiscus
Tropical hibiscus wont tolerate even a whiff of frost.
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Some varieties feature bronze or purple foliage to boost the ornamental value.
The gorgeous ‘Summer Storm’ with pink flowers has a dark magenta eye.
In cold regions, use mulch or straw to protect the roots, especially when the plants are young.
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The flowers sit atop 3- to 6-foot stalks above the water surface.
As striking as sacred lotus is, it is considered a noxious weed in some Midwestern states.
This plant is mildly toxic to animals.
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Like most lilies, orienpet lilies are best planted in late fall or early spring.
In neutral or alkaline soils, water with an acid-enhanced fertilizer to help them thrive.
Lilies are toxic to animals.
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It blooms in late spring to early summer.
The flowers are bright white with a pink-purple center and are fragrant.
The tree is native to the southeastern United States and grows 30 to 40 feet tall.
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For the biggest flowers, plant a cultivar of theCamellia japonicaspecies such as ‘Don Mac’.
The plants are slow to grow and get established but they are long-lived.
Depending on the variety, the flowering period may start as early as October and last until March.
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Dinner-Plate Dahlia
The term dinner-plate dahlia is used to describe any variety of dahlia (Dahliaspp.)
with large, impressive flowers measuring at least 8 inches across.
Most commercially available dinner-plate dahlias are hybrid cultivars.
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Like many large flowers, dahlias like more of everything: more sun, more water, more feeding.
Remove side buds to enable plants to direct their energy into producing a few giant flowers.
Stake plants for support, and expect the blooms to mature in late summer.
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Dahlias are toxic to animals.
Amaryllis
For an indoor plant with large flowers, you cannot go wrong with amaryllis.
This popular holiday plant comes in many different colors and forms.
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Theamaryllis bulbssold commercially are cultivars derived from hybrids of variousHippeastrumspecies.
Double Record' with red and white streaking produces 8-inch flowers.
Larger bulbs produce larger plants and flowers, so splurge on premium bulbs from trusted vendors.
Martin Siepmann / Getty Images
Amaryllis is toxic to humans and animals.
The artichoke-like flowers can grow up to one foot across.
Parts of this plant (flowers, seeds, and nectar) are toxic to humans and animals.
The Spruce / Adrienne Legault
It will grow quickly, often between 24 to 36 inches per year.
The flowers are 4 to 6 inches in diameter on plants that grow 2 to 3 feet tall.
Like all zinnias, they are heat-tolerant and deer-resistant, and the flowers attract pollinators.
The National Garden Bureau
The large flowers are also great for cutting.
Moonflower
Only night owls will appreciate the nocturnal blooms of moonflower(Daturaspp.
), which swirls open at dusk to reveal 6-inch white flowers.
The Spruce / Adrienne Legault
Blooms stay open all night.
If you nick or soak the seeds, germination can occur in as little as a week.
Combine the fast-growing plants with morning glories, and you will yo hummingbirds and hummingbird moths alike.
The plant may reseed rampantly in some regions so check with your local Extension Office before planting.
Moonflower is highly toxic to humans and animals.
The largest flower is Rafflesia arnoldi, also known as monster flower or corpse flower.
Other, more common, plants with big flowers include bigleaf magnolia, sunflowers, and water lilies.
Rafflesia arnoldi can be found in the Malaysian and Indonesian rainforests.
Delphinium.North Carolina State Extension.
Skin problems from outdoor plants.
Sacred Lotus.Wisconsin Department of Natural Resources.
Our Top Three Summer Garden Safety Tips.ASPCA.
Which Lilies Are Toxic to Pets?ASPCA.
Amaryillis.University of Arkansas Division of Agriculture.
Guide to Poisonous Plants.
College of Veterinary Medicine and Biomedical Sciences.
Datura.Wisconsin Horticulture, Division of Extension, University of Wisconsin-Madison.
