Flowers that start with the letter O

If you are looking for flowers that start with the letter O, there are many options to choose from. You can choose from a variety of colors, shapes, and sizes. Whether you are looking for a plant for your garden or just want to add a little interest to your home, these flowers are a great option. So, go out and get yourself some O-flowers today!

Orchids

Table of Contents

Obedient Plant

The obedient plant, also known as Physostegia virginiana, is a flowering herbaceous perennial that is native to North America. It gets its name from the fact that its flower spikes can be bent or shaped in any direction without breaking. The plant has opposite, lance-shaped leaves and produces tubular flowers in shades of pink, lavender, or white. Obedient plants are easy to grow and make excellent additions to borders or rock gardens. They do best in full sun and average soil but will tolerate some shade and poor soils.

Obedient Plant

Obovate Peony

The Obovate Peony is a flower that blooms in early spring. It is native to China and has large, showy blossoms that make it a popular choice for gardens. The flowers are white or pink with a yellow center, and the plant grows to be about two feet tall.

Obovate Peony

Ohio Spiderwort

Ohio spiderwort is a member of the genus Tradescantia. It is a perennial plant that produces blue or purple flowers. The leaves are oval-shaped and the stem is hairy. Ohio spiderwort can be found in woods, fields, and gardens. It blooms from May to July.

Ohio Spiderwort

Old Lady Cactus

Old Lady Cactus is a type of cactus that produces beautiful white flowers. It is native to Mexico and can be found in many parts of the country. The plant typically blooms in the springtime, but can also bloom during other times of the year. Old Lady Cactus is a popular plant for gardens and landscaping due to its unique appearance and easy care requirements.

Old Lady Cactus

Old Man of the Andes

Old Man of the Andes is a flowering plant that belongs to the genus Alstroemeria. It is native to South America and can be found in Peru, Bolivia, Chile, and Argentina. The Old Man of the Andes gets its name from its large, bulbous roots which resemble an old man’s head. This plant has long been used as a medicinal herb by the indigenous people of South America for treating various ailments such as stomach pains and diarrhoea.

Old Man of the Andes

Old Man of the Mountain

The Old Man of the Mountain plant is a member of the daisy family. It gets its name from the way its flowers look like an old man’s face. This plant is native to Europe and Asia, but it can now be found in many parts of the world. The Old Man of the Mountain plant is a popular choice for gardens because it is easy to care for and it blooms for a long time.

Old Man of the Mountain

Oleander Plant

The Oleander Plant can be found in colors such as white, pink, and red. This plant is native to Asia and the Mediterranean region. The Oleander Plant is poisonous if ingested, so it is important to keep this plant away from children and pets. Despite its toxicity, the Oleander Plant is still a popular choice for many gardeners because of its beauty.

Oleander Plant

Orchid

Orchid is a genus of flowering plants that includes more than 25,000 species in over 800 different genera. The vast majority of orchids are found in the tropics, with only a few species occurring in temperate regions. Orchids are epiphytic, meaning they grow on other plants or objects rather than in the ground. Many species of Orchid have fragrant flowers and are popular as houseplants.

Orchids come in a wide variety of colors, including white, pink, purple, red, yellow, and green. The most common flower shape is called an “orchid blossom” which has three petals and three sepals that look like petals. The word “orchid” is derived from the Greek word “orkhis,” which means testicle. This is in reference to the shape of the root system of many Orchid species.

Orchid

Oregon Grape

Oregon Grape is a flowering plant that belongs to the barberry family. It is native to western North America and can be found in the Pacific Northwest region of the United States. The Oregon grape has dark green leaves and clusters of yellow flowers. It grows best in moist, shady areas.

The Oregon grape is also known as the mountain grape or holly-leaved barberry. It is a popular ornamental plant and is often used in landscaping. The Oregon grape can reach a height of 15 feet and has a spreading growth habit.

The fruit of the Oregon grape is a small, dark purple berry. These berries are not edible for humans, but they are a favorite food of birds. The berries can also be made into jelly or wine.

Oregon Grape

Organ Pipe Cactus

Organ Pipe Cactus is a type of cactus that is native to the Sonoran Desert in Arizona. It gets its name from its tubular shape, which resembles a pipe organ. The cactus can grow up to 30 feet tall and blooms white flowers in the spring. Organ Pipe Cactus is one of the few cacti that are not native to Mexico.

Organ Pipe Cactus

Oregon Sunshine

Oregon Sunshine is a yellow flower that grows in the state of Oregon. It is a member of the daisy family and its scientific name is Helianthus annuus. The flowers are usually about two inches wide and have sixteen petals. They bloom from June to August and attract bees, butterflies, and birds.

The plant is native to North America and was first discovered by Lewis and Clark during their expedition westward. It was named after the state of Oregon, where it was first found growing in the wild. Today, it is grown in gardens all over the United States as an ornamental plant.

Oregon Sunshine

Oriental Lily

The Oriental Lily is native to Asia, and it has been cultivated for centuries. The Oriental Lily is widely used in bouquets and arrangements, because of its large, showy flowers. This lily comes in a variety of colors, including white, pink, red, and purple.

Oriental Lily

Oriental Poppy

Oriental poppies are one of the most popular flowers in the world. They are native to Asia and Europe, and they have been cultivated for centuries. Oriental poppies are characterized by their large, showy flowers that come in a variety of colors. The petals of oriental poppies are usually red, but they can also be pink, orange, or white. Oriental poppies typically bloom in late spring or early summer.

Oriental Poppy

Ornamental Onion

Ornamental onion, also known as Allium cernuum, is a species of flowering plant in the amaryllis family. It is native to Asia and Europe. The flowers are pink or white and have a strong onion-like scent. The leaves are linear and up to 20 cm (eight inches) long. The plant blooms in the summertime.

Ornamental onions are often used as ornamental plants in gardens. They can be planted in borders, rock gardens, or as a groundcover.

Ornamental Onion

Osteospermum

Osteospermum, commonly called African daisy, is a genus of about 30 species of flowering plants in the family Asteraceae. They are native to Africa, Madagascar and Arabia. A few species are also naturalized in Australia, New Zealand, Europe and North America.

Osteospermum flowers have petals that roll back as they mature. The flowers may be white, yellow, pink or purple and have a center of black or brown. The plants bloom in spring and summer. Osteospermums are easy to grow in well-drained soil in full sun. They are drought tolerant but prefer moderate watering during prolonged dry periods. Propagate from seed sown in spring or by division in fall. Pinch back plants to encourage bushiness. Deadhead spent flowers to prolong blooming.

Plants may be evergreen or deciduous, depending on the species and climate. In cold winter climates, they are often grown as annuals. Osteospermums are low-maintenance plants that make great additions to flower beds, borders and containers.

Osteospermum

Oyster Plant

The Oyster Plant, or Mertensia maritima, is a beautiful and unique flower that will add interest to any garden. This plant gets its name from the shape of its flowers, which resemble oysters. The Oyster Plant is native to North America and can be found in woods and along streams from Quebec to Alaska.

This hardy perennial is not difficult to grow and makes a great addition to any garden. The Oyster Plant prefers partial shade but will tolerate full sun if given enough moisture. It is best grown in moist, well-drained soil. If you live in an area with hot summers, it is best to provide some afternoon shade for your Oyster Plant.

Oyster Plant

Ox Eye Daisy

Ox Eye Daisy (Chrysanthemum leucanthemum) is a perennial flower that belongs to the Asteraceae family. This plant is native to Europe and Asia but can now be found in North America, Australia, and New Zealand as well. The Ox Eye Daisy gets its name from its large, white flowers that have a yellow center and resembles the eye of an ox.

This plant is relatively easy to grow and does best in full sun or partial shade. It prefers moist soil but can also tolerate dry conditions. Once established, the Ox Eye Daisy is quite tolerant of drought.

Ox Eye Daisy
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Oliver Wright
Oliver Wright

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