🌼 19+ Cute Flowers That Start With O | Exciting Pictures

Are you searching for something unique to brighten your garden or bouquet? Flowers that start with O can be the perfect choice. I still remember planting my first Oriental Lily in the garden. Its bold petals and rich fragrance filled the air and instantly changed the look and feel of my home.

We have already explored flowers starting with K, L, and M. Now, let’s uncover more and see the beauty of blooms that begin with O! 🌸

Olearia

Olearia, also known as “Daisy Bush,” is a flowering plant member of the Asteraceae family, the largest plant family in the world. These are mainly herbaceous shrubs and small trees. Olearia has beautiful daisy-like flowers in mauve, purple, pink, and white.

Its growth rate is about 30cm, and it blooms well in full sunlight with appropriate watering. For optimum growth, the soil must be moist and well-drained.

Osteospermum

Osreopermum is one of the smallest tribe of the daisy or sunflower family, Asteraceae. It is also famous as an “African Daisy” and “Daisy Bushesh,” a refreshing bloom in shades of purple, yellow,  pink, and white. They have daisy-like flowers and dark green leaves that add beautiful colors to your home garden or any container. 

These flowers grow best in warm, humid, and sunny spots with rich soil. Still, they can easily handle salt, poor soil, or even drought. Moreover, the latest cultivars bloom steadily when you water and fertilize them properly

Orange Hawkweed | Flowers That Start With O

Another charming flower in my list of flowers is Orange Hawkweed. It is a perennial flowering plant that belongs to the Asteraceae family. The other common names of this attractive wildflower are “Grim-the-collier and “Devil’s Paintbrush.”

All parts of this plant produce a milky juice and are most commonly present in meadows and along the roadsides.  Its name originated from the Latin epithet “aurantiaca” which means ‘orange,’ the common color of the flower. 

Ostrich Fern

The Ostrich Fern is a fern genus with only 1 species and a member of the Onocleaceae family. It has large, tall, feathery, and vertical fronds. Its deciduous green fronds are 39-67 inches tall and 7.9–14 inches broad, similar to the ostrich plumes. They are motley seen in green color.
The Ostrich Ferns grow in partial to full shade, well-drained soil, and average to high amounts of water. They are susceptible to sunlight, and leaves can be discolored or burned when under direct sunlight.

Orchid | Flowers That Start With O

Orchids are unique and delicate flowers belonging to one of the great flowering plants, Orchidaceae. They are exotic and perennial flowers with complex and white colored flowers.

One of the most fascinating things about orchids is that we can control how much they bloom. By adjusting day length or changing the temperature, growers can trigger their flowers to open as needed.

Obedient Plant

Obedient Plant is a perennial flower that belongs to the Lamiaceae (mint family). Its name is because its flowers remain in the place when moved. Also known as “Obedience and False Dragonhead.” Obeyed plants have lances of conical flowers with shades of purple and pink on white. 

Obedient plants flourish well in full sunlight and well-drained soil, which helps to avoid the loss of lower leaves on the plant stems. Direct full sunlight is also favorable for flower growth and gives the number of flowers.

Ononis | Flowers That Start With O

Ononis are perennial herbs or shrubs that belong to the Fabaceae family. They are low-growing shrubs with bunches of purple or pink eye-catching blooms. Onions are commonly seen on coasts and rocky areas. They are used as food. 

Ononis plants prefer full sunlight to partial shade in low to medium-watered soil. The plants also have medicinal properties, and many herbalists widely use them in traditional home remedies.

Orach

Orach is a green plant of the Amaranthaceae family. They have tiny flowers and leaves that are edible with a salty and spinach-like taste. They are used in different salads, cooked or raw. In Italy, green leaves are used to color pasta. A common use of the orach is to balance out the sour flavor of sorrel.

They are also cultivated as an ornament and serve as a vegetable and are diuretic, anti-oxidant, emetic, and purgative. Its seeds grow fastest when the temperature of the soil is between 50 and 65 degrees. It is a cool-weather lover and frost-tolerant, but it also grows in warm temperatures.

Oenothera

Oenothera, also known as “Evening Primrose,” “Sundrops,” and “Suncups”, is a flowering plant that is a member of the Onagraceae family. They have different species of plants with pink, yellow, or white-coloured flowers.
Its oil (Oenothera biennis) is used for different health conditions, especially for women, such as breast pain (mastalgia), premenstrual or menopausal symptoms, and labour induction. Interestingly, all parts of Oenothera are edible, but its oral use might increase the chances of bleeding.

Oleander | Flowers Beginning With O

Rosebay is another common name for Oleander; it is a hardy evergreen small tree or shrub belonging to the Apocynaceae family. Its flowers have different shades of dark pink, light red, and yellow. Almost all parts of this dangerous plant are extremely toxic, and a single leaf can kill an adult.
Oleander can cause other health problems like vomiting, nausea, abdominal pain, hyperkalemia, diarrhoea, and dysrhythmias. By the way, it is illegal in the USA.
They perform well in full sunlight and moderate watering.

Oxeye Daisy

The Oxeye Daisy, Dog daisy, and  Marguerite are lovely flowers belonging to the Asteraceae family. A mature Oweye Daiy plant can produce approximately 26,000 seeds that vehicles, animals, and humans can spread. They are larger than the common daisy flowers.

It is non-toxic, and animals can consume its milk. Oxeye daisy has bright white petals and a dark yellow center, the best addition to add warmth and colors to any garden.  They have some traditional medicinal uses, too, considered best for healing cough, asthma, and other types of coughs.

Ornithogalum | Flowers Beginning With O

Ornithogalum is a lovely perennial flowering plant, a member of the Asparagaceae family. It is also called the “Star of Bethlehem,” due to its star-shaped and white-coloured bloom.
Ornithogalum flourishes on moist, fertile, well-drained soils in full sun to part shade.

These plants spread quickly through their bulbs, so they often take over gardens and even move into the wild. However, they are toxic to dogs, and sadly, they can cause serious problems like vision loss or even permanent blindness.

Oregano

Oregano is one of the most famous herbs from the Lamiaceae family. They have pretty charming flowering variations. Its flowers come in bright pink or purple color, making them a luxury addition to any home eco-friendly garden.

Because of its rich flavor, oregano is also used in cooking. It tastes warm, spicy, and slightly bitter, with different levels of intensity. This can be grown in full sunlight with minimal to average watering.

Oriental Poppy

The Oriental poppy is a rare and unique perennial flower with large and bright flowers in attractive colors like pink, red, and orange. They prefers soil with a pH of 6.5 to 7.5 and full direct sunlight or partially shaded conditions.
These are low-maintenance and hardy poppies, members of the Papaveraceae family.

Ornamental Onion

Allium is basically a monocotyledon flowering plant, a member of the Amaryllidaceae family. Ornamental Onions have globe-shaped flowers in purple, yellow, and white.
It is a globular perennial known for its garlic onion fragrance. It stands 35-50 inches tall and has a massive umbel of densely packed flowers.

Both edible and ornamental alliums are toxic to dogs. Red blood cell destruction, upset stomach, oral discomfort, drooling, vomiting, and diarrhoea are all brought on by consuming large quantities of ornamental onion.

Ozothamnus

Rice Flower is the most common and well-known name for the Ozothamnus flower. It is a woody shrub that belongs to the Asteraceae family. It has dense heads of tiny, rice-like bunches of white or pink flowers, primarily used in floral arrangements.

Fast-growing, medium-sized shrub, 6 to 12 feet tall, with appealing green leaves. It can tolerate moderate frosts, full sun, and most well-drained soils.

Oswego Tea | Flowers That Begin With The Letter O

Oswego Tea is an aromatic herb of the Lamiaceae family. It is also called the “Bee Balm”. “Bergamot”, “Eau-de-Cologne plant”, and “Scarlet monarda,”.
It’s said to smell like bergamot oranges, which are used to flavour Earl Grey tea. This plant attracts hummingbirds and serves as a juvenile host for the hermit sphinx, berry pyrausta, and orange mint moth. It has a mint-lie taste.

Oxalis

Oxalis, commonly known as Wood Sorrel, is a flowering plant belonging to the Oxalidaceae family. These plants can be either annual or perennial. The leaves are divided into three, five, or ten or more oval, outstanding leaves.

In India, people eat Oxalis only during the winter months, mainly from December to January. Moreover, this plant grows well in strong indirect sunlight, but it can also handle direct sunlight when it comes through a window or door. However, when placed outside, it should stay in the shade because it cannot survive under direct harsh light.

Ornamental Peppers | Flowers That Begin With The Letter O

These ornamental peppers have beautiful, small, colorful, and attractive fruits. It is also known as Sweet Pepper, Jalapeño, Bell pepper, or Cayenne.

Ornamental peppers are fruits from the nightshade family. Their high content of antioxidants and low-calorie content make them an excellent addition to a healthy diet.

Its leaves are a little toxic to humans. They can attract bees, whiteflies, cutworms, and Colorado potato beetles, best for an eco-friendly garden.

Conclusion

Flowers are not only beautiful, they also tell unique stories. The ones that start with O show mystery, charm, and even a little danger, like the Oleander. From the glowing Evening Primrose that blooms at night to the bright Osteospermum that follows the sun, these flowers bring life and personality to any space.

So whether you are planning your garden or simply enjoy learning about blooms, keep exploring with us. There is always more floral beauty waiting to be discovered. 🌸

Be happy!

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