If you’re looking for flower names that start with the letter O, then you’ve come to the right place! In this article, we will explore a wide range of flower types that all begin with the letter O. From options such as orange cosmos and oxeye daisy to more exotic varieties like oxalis and Ornithogalum, you are sure to find the perfect option for your yard or special occasion.

Obedient Plant

Flower names that start with the letter O are quite diverse and can provide lovely accents to any yard. One of the most well-known is the Obedient plant (Physostegia virginiana), an easy-to-grow perennial that can add charm and color to nearly any landscape. This unique bloom has long been a favorite of gardeners, who enjoy its bright spikes of flowers in shades of pink, white, and purple. Obedient plant acquired its name from the unique trait of blooms that remain in position when pulled or twisted around the stem.

The Obedient plant is native to North America, where it’s found in moist soils along stream banks and ponds. It’s hardy in zones 3a-9b and prefers partial shade or filtered sunlight for best performance. Growing up to four feet tall with a spread of two feet wide, an Obedient plant can be divided every few years for propagation or simply left alone for a more natural look in your garden bed!

Oriental Lily

The Oriental lily is known for its captivating, sweet scent and large petals. It typically grows to be around 1-3 feet tall and produces large multiple-colored petals, ranging from light pink to a deep red hue. The blooms of an Oriental lily can often reach up to 6 inches in diameter and its leaves measure about 4-7 inches long.

This stunning flower has a long history dating back as far as 2,500 years ago. Oriental lilies were originally cultivated by ancient Greeks and Romans, who used them as decoration for their homes and gardens.

Ornamental Onion

If you’re looking for a flower that starts with the letter O, then the Ornamental onion is a great option. This vibrant bloom is an edible flower and can add texture and color to any garden. It’s also easy to care for, requiring only good soil drainage and full sun. In addition to attracting pollinators, Ornamental onions repel deer and other mammal pests and make wonderful cut flowers.

The Ornamental onion grows in clusters of star-shaped flowers atop tall stems which are covered in thin hairs. The flowers themselves are small and range in color from purple to pink to white. Their petals have thick ruffles that give them an exotic look. They thrive in areas such as rock gardens or wildflower beds where they can get plenty of sunlight and air circulation. Although Ornamental onions may tolerate partial shade, they prefer full sun and should be planted in well-draining soil. Once planted, these flowers will come back year after year with minimal effort from their gardener!

Oyster Plant

When it comes to flowers that start with O, one stands out: the Oyster plant (Mertensia maritime or Acanthus mollis). This unique and beautiful flower, also known as sea-lungwort, is native to the coasts of Europe and North America. It is a perennial that grows in rocky areas near the ocean, earning its unique name from its fleshy foliage, which resembles an oyster shell.

The Oyster plant is a small perennial with scalloped leaves that resemble those of a lilypad. Its blue or pink flowers bloom in early spring and can be used for cut flowers or dried arrangements. The blossoms of Acanthus mollis are held on erect stems up to two feet tall. Other varieties of the species grow along coastal regions in the US from Virginia to Alaska, ranging from annuals to perennials, depending on their location.

Orchid

When it comes to flowers that start with O, one of the most popular choices is Orchid. Orchids are the largest family of flowering plants, and within this family, there is a vast array of species. This beautiful and exotic genus of blooms has been cultivated for centuries, and there are thousands of species around the world today. The Orchid family contains many types of flowers, all beloved for their unique shapes and colors.

The classic Orchid is often found in shades of pink, purple, white and yellow. These lush blooms symbolize love and beauty, making them a great choice for special occasions or romantic gifts. There is a huge variety of sizes, from tiny miniatures to large, showy varieties. No matter what type you choose, Orchids make an excellent addition to any yard or home décor setting.

Oriental Poppy

Oriental poppy (Papaver orientale) can be found in gardens all over and is a favorite of many gardeners. With its large, cup-shaped flowers and deep hues of pink, red, orange and yellow, this showy plant will brighten up any garden with its beauty.

The Oriental poppy blooms in late spring or early summer and can reach heights between two to three feet tall. Its foliage consists of deeply cut green leaves, which contrast nicely against the vibrant colored blooms. Not only does this flower make for a great addition to any yard, but it also attracts bees, butterflies and other beneficial insects, as well as other pollinators such as hummingbirds.

Ox Eye Daisy

Another particularly eye-catching flower is the Ox eye daisy (Leucanthemum vulgare). These flowers have bright yellow centers surrounded by white petals and a halo of small green leaves. They make an excellent addition to any garden or bouquet.

Ox eye daisies can be found in many parts of the world, from Europe to North America and even Asia. Commonly known as dog daisies or marguerites, these cheerful blooms will bring color and life wherever they grow. The beauty of the Ox eye daisy is unmatched; it’s no wonder why it’s such a popular pick for many flower enthusiasts!

Orange Daylily

The Orange daylily is an especially popular pick and it is found in gardens all over the world. This flowering plant offers both a striking visual appeal and hardiness that allows it to thrive in a variety of climates. It is a perennial plant.

The Orange daylily has bright orange-hued petals with yellow centers. It’s an incredibly vibrant flower that stands out among any garden bed or bouquet. The blooms last for several days before they eventually fade, making them great for adding bursts of color to outdoor areas or as part of indoor displays. These flowers also have low maintenance needs and require only minimal watering and care throughout the growing season.

Oregano

Oregano is an herb that can be used in both cooking and in medicine as well as being a popular ornamental garden plant due to its vibrant purple flowers. It’s an adaptable species, able to tolerate drought conditions and grow in rocky soils with little nutrition. It also has a strong scent often associated with Italian cuisine due to its use as a culinary herb for many dishes from the region.

The Oregano plant can be grown from seed and will produce clusters of small flowers throughout the summer months. It’s easy to care for, needing only occasional watering, pruning, and deadheading to ensure flowers continue to bloom in abundance. Once established in the garden it will come back year after year without too much effort from the gardener. Adding this pretty flower to your yard is sure to bring plenty of color into any outdoor space!

Orlaya

Orlaya grandiflora, commonly known as Orlaya, is an annual plant native to southern Europe. These delicate white flowers grow in clusters and bloom in late spring and early summer for about two weeks. It makes for a perfect addition to any yard due to its lacy foliage, which gives it a feathery texture. In addition, it attracts bees while repelling deer.

The flowers grow up to four inches in diameter and feature five-petaled blossoms atop long stems. This eye-catching bloom stands out among other flowering plants because of its soft white color that appears almost translucent at times.

Ohio Spiderwort

Another unique flower from Ohio is the Ohio Spiderwort (Tradescantia ohiensis). It is a herbaceous perennial plant. This bright purple-blue bloom has long stalks and three-petaled flowers that usually appear in springtime clusters. It’s a lovely wildflower that adds a splash of color to any garden or meadow.

The Ohio Spiderwort is an important part of local ecosystems, providing food for bees and other pollinators. It can also be found growing wild in roadsides and woodland habitats across Ohio, Indiana and Pennsylvania.

Old Lady Cactus

This beautiful cactus features a unique pattern of white spines on its stems and produces vibrant pink flowers in springtime. The Old Lady Cactus is among many other flowering plant varieties that have names beginning with O such as Oleander, Oxeye Daisy, Orchid Tree, Orange Sunflower, and Opium Poppy. These flowers can be found in gardens throughout the world and provide beauty to any landscape or arrangement.

Obobate Peony

The Obobate peony has beautiful white, yellow, bright red and pink petals, and its blooms can reach up to 8 inches across. This variety of peonies grows in zones three through nine and prefers full sun exposure, making it an ideal choice for gardens in many parts of the world.

The Obobate peony requires well-drained soil and should be planted in early autumn for best results. This flower has long-lasting blooms, about four weeks on average, so you can enjoy its beauty for months at a time. The plant does not require much maintenance besides watering; however, some pruning may be necessary if it becomes overgrown.

Oxblood Lily

Native to Australia and New Zealand, this beautiful bloom is often used as an ornamental flower in a variety of different gardens. Its distinctive deep red-purple color stands out in any garden setting, making it quite a stunning sight when in full bloom.

The Oxblood lily gets its name from its deep red-purple petals, which are said to resemble ox blood. Oxblood lily has the unique trait of becoming dormant during the summer, so prepare to see it blossom in the autumn. This unique flower also has a pleasant sweet fragrance and can be found growing wild throughout Australia and New Zealand. It’s also common for gardeners to cultivate them in their own gardens for their attractive blooms and delicate scent.

Oleander

Oleander (scientific name Nerium oleander) is one of the most popular flower names that start with the letter O. The oleander shrub’s sweet-smelling blossoms have inspired poets and painters alike, and its bright colors bring a vibrancy to gardens both big and small. With its long blooming season and ease of care, Nerium oleander is a popular choice for gardeners looking to add lasting beauty to their gardens.

Old Man of the Andes

Old man of Andes is native to South America, where it is commonly found growing in rocky areas at high altitudes. Its scientific name is Oreocereus celsianus, though it’s also known as an Old man’s beard or Senecio angulatus.

The Old man of the Andes gets its name from how its long and silvery leaves cascade down from its stem like an old man’s white beard. It has bright yellow flowers that bloom in clusters throughout springtime, adding splashes of color to the landscape.

Oregon Grape

The Oregon grape is an evergreen shrub native to western North America. It grows small yellow flowers in clusters that bloom from spring to early summer. The berries of this plant look like grapes but have a tart flavor and contain many antioxidants. In addition, it’s a good nutricious source for birds, bears, and other animals like raccoons, foxes, and deer. These berries can be used for jams, jellies, and syrups for baking.

FAQ

✅What is the rarest flower name beginning with O?

Ophrys apifera, commonly known as the bee orchid, is the rarest flower name beginning with O. This unique species of orchid is native to meadows and grassland regions in Europe and can be identified by its unusual shape – which resembles a bee in flight.

✅What are the most popular flowers starting with O?

Oriental lilies are one of the most popular flowers, starting with the letter O. These bright, fragrant blooms make a fantastic addition to any floral arrangement or bouquet. They come in a range of colors, including white, pink, yellow, and red. Their large petals and the intense scent will add beauty and fragrance to any space. Orchids are another type of flower that is immensely popular with o-starting names. They come in an array of different varieties and sizes, making them ideal for small spaces such as apartments or offices.