20 Outstanding Flowers that Start with O With Picture

It would be an exciting journey learning about Flowers that Start with O. In this long list of floral plants, one would run into some of the most extraordinary and exquisite flowering plants, like the Orchid, with its exotic and tropical beauty to some very ordinary but breathtakingly beautiful, like the Oxeye Daisy. They appear in almost every color and shape imaginable: from vibrantly orange Oriental Poppy blossoms lighting up your garden to delicate pink petals gracing your garden bed, it is always elegant to the garden bed—the Obedient Plant.

Mix in the purples of the Osteospermum and add the white stars of Ornithogalum for a mesmerizing display. There is an enriching story and name—annual or perennial—behind each of these flowers that nature bestows on our gardens. Some, like the Oleander, flaunt poisonous nectar, adding mystery to the air.

As spring arises, so does Oenothera, with its yellow blooms heralding the coming, and Oxalis flowers enchanting everyone with their charm. So, the kinds of letter O in the plant world unfold—an alluring array of names of images that start with this vowel, each contributing its flair to nature’s tapestry: enter a world of flowers beginning with the letter O and let their beauty enchant you.

Whether you plan on propagating new varieties in your garden or wish to know a little more about these wonderful plants, here will be the summary of information for twenty gorgeous flowers whose names begin with the letter O. If you want to learn about more flowers that start with the letter O, check out articles by Glenn Hegsted.

List of Flowers Starting With O

Oleander

This is a hardy evergreen shrub, with heads of beautiful flowers. These flowers come in shades of pink, red, white, and yellow. Oleanders form prominent decorative displays in warm climates and could be found forming borders along streets or in gardens. They will be doing fine in full sun with moderate amounts of water, provided there is good drainage—the more preferential factor for its growth. However, Oleanders are beautiful yet toxic. Thus, handle them with care, especially amongst pets and children.

Orchid

Orchids belong to one of the largest families of flowering plants and consist of more than 25,000 species. They are exotic flowers with complicated, colorful blooms. Orchids are also adapted to inhabit different kinds of habitats—from the hot, humid, tropical rainforests to the arid deserts, requiring indirect light, watered once a week, and specific orchid mix soil for cultivation.  Orchids can be a bit tricky to care for, but their stunning appearance makes them worth the effort.

Oxeye Daisy

The Oxeye Daisy, Leucanthemum vulgare, is a cheerful flower, slightly larger than the common daisy. It has white petals with a yellow center and so provides a splash of brightness in any garden. Oxeye Daisies prefer full sun to partial shade and low to moderate watering. They do best in well-drained soil. These daisies are relatively easy to grow and may spread quickly, thus providing quite an attractive display of blooms.

Osteospermum – Flowers That Start With O

Another colorful bloom is the osteospermum, or African daisy, in shades of purple, pink, yellow, and white. All these daisy varieties have daisy-like flowers that are much suitable to color your garden or any container. Osteospermums love full sun and just need to be watered moderately. This plant will appreciate well-draining soil for its ideal growth. They aren’t hard to care for at all and bloom over a long period.

Ornithogalum

The flowers of the Ornithogalum, which is also referred to as the Star of Bethlehem, take on a star shape and are white. They are propagated for growing in rock gardens and for ground coverage. They do well in full sun to partial shade and in average water. However, they need their soil to be well-drained. Ornithogalum flowers not only please one’s eyes but also give out a soft sweet fragrance.

Obedient Plant

Physostegia virginiana was called the “Obedient Plant” because its flowers will stay in place when moved. Obeyed Plants bear spikes of tubular flowers with shades of pink, and purple over white. Obedient Plants like full sun to partial shade with medium watering. These plants are excellent performers on well-drained soil. It is the right type of plant to grow for adding height and color to the border of the garden.

Oregano – Flowers That Start With O

Oregano is one of the most well-known culinary herbs, from which some pretty interesting flowering varieties have been produced. They’re pink or purple-flowered and make a good addition to any pollinator garden because they attract bees and butterflies. This can be grown in an area with full sun and low to moderate watering. The plant does require well-drained soil. This herb is consumed not for its beauty but for its aromatic leaves in kitchens everywhere.

Olearia

Olearia forms a genus of flowering plants producing daisy-like blooms; it is the daisy bush. These shrubs are endemic to Australia and New Zealand and feature blooms in different hues—white, blue, and purple flowers. It grows well in full sun with reasonable watering. For the growth of this shrub, the soil needs to be well-drained. It’s often used sea-side because it’s tolerant of salt.

Oriental Poppy – Flowers That Start With O

The Oriental Poppy, known botanically as Papaver orientale, bears large, showy flowers in bright colors like red, orange, and pink. This makes for a perquisite diversity in a garden that is perennially very unique. Oriental Poppies do best in full sun but require only moderate watering. Their soil should be well-drained. These are generally low-maintenance poppies with some hell-bent dramatic floral display late into the spring and into early summer.

Ononis

Ononis, or Restharrow—bushes low-growing, with clusters of pink or purple flowers—are common in coasts and rocky areas. Ononis plants will grow in full sun to partial shade in low to medium-zoned watered soil with good drainage. The plants are considered medicinal and used by herbalists in traditional remedies.

Ornamental Onion

Allium species, or the Ornamental Onion, bears globe-shaped clusters of flowers differently colored—purple, white, and yellow. Plants like this will add a nice touch of sleeves in the border in your garden. Ornamental Onions grow well under full sun with moderate watering. Well-drained soil is needed for the development of such plants. Other than their beauty, these are deer-resistant plants, hence highly recommended to be grown in deer-prone areas.

Orange Hawkweed – Flowers That Start With O

Orange Hawkweed is a very striking wildflower producing bright orange-colored flowers. These plants are most commonly found in meadows and along roadsides. Orange Hawkweeds do well in full sun and require low to moderate watering. They like well-drained soils. These wildflowers are aggressive spreaders and form great blocks of color.

Ozothamnus

Ozothamnus, more commonly called Rice Flower, is a genus of shrubs bearing small, rice-like clusters of white or pink flowers. They are native to Australia and used quite a lot in floral arrangements. Ozothamnus does well with full sun and requires average watering. They prefer well-drained soil. They are long-flowering shrubs, often used dried in flower arrangements.

Orach – Flowers That Start With O

Atriplex Hortensis is a leafy green plant with inconspicuous small flowers. The leaves of this plant are edible and thus cultivated as an ornament, serving as a vegetable. It will do best in full sun but partial shade with moderate watering. The soil must have good drainage. Orach gets raised explicitly for the color effect due to its very decorative and colored foliage.

Oswego Tea

Monarda didyma has several names, Oswego Tea or Bee Balm. This perennial plant bears mainly from the flowers red, pink, or purple. Essentially, this represents a type of flower; most of them attract bees, butterflies, and hummingbirds during times of flowering. Generally, plants that are grown require a sufficient amount of sunlight or partially shaded with amounts of watering—fast and well-drained soil. These flowers are used ornamentally and are fragrant, similar to mint.

Ostrich Fern

The Ostrich Fern is recognized by its tall, feathery fronds that are reminiscent of an ostrich’s plumes. Lacking showy flowers, this fern makes much difference in shaded gardens with its unique foliage. The Ostrich Fern grows best in partial shade and full shade, needing an average to high amount of water; it likes moist but well-drained soil. These ferns are ideal to provide a nice green backdrop to the garden beds and borders.

Oxalis – Flowers That Start With O

Oxalis, commonly referred to as Wood Sorrel, is a genus of plants with rather fragile, clover-like leaves and small, colorful flowers. This is mainly grown for ground cover or in containers. These plants prefer part shade to full sun with moderate watering—well-drained soil. These plants can rebloom several times during the growing season.

Oenothera

Oenothera, or the Evening Primrose, includes several species of plants with yellow, pink, or white flowers. In most of the species are responsible for their common name. The plant requires full sun and moderate watering with properly drained soil. These plants are medicinally used and are part of herbal remedies in several traditions.

Ornamental Peppers – Flowers That Start With O

These ornamental peppers (Capsicum annuum) bear small, colorful fruits that often come into play in bedding displays. Not generally cultivated for their flowers, the brilliant fruit offers a shock of color in the garden or container. The cultural requirements for ornamental peppers specify full sun and moderate watering with well-drained soil. These plants are perfect for adding a festive touch to outdoor spaces.

Conclusion of Flowers That Start With O

Most conclusively, it is the flowers that start with o that extremely diversify into colorful, shaped, and sized flowers that add beauty to any garden or floral arrangement like flowers that start with m. From the exotic beauty of Orchids to the bright flowers of the Oxeye Daisies, each one has its charm. Whether you plan on propagating new varieties in your garden or wish to know a little more about these wonderful plants, here will be the summary of information for twenty gorgeous flowers whose names begin with the letter O.