Looking to broaden your gardening expertise and enhance the visual appeal of your garden? Look no further, as we present to you an exquisite compilation of flowers that start with the letter ‘O’. Are they the most attractive and appealing flowers in the floral realm? Let’s explore this fascinating and enthralling assortment of blooms, including orchids, oriental poppies, and other charming flowers that commence with the letter ‘O’. If you want to expand your horizons, here are seven stunning flowers that begin with ‘I’.
Flowers that Start with O

1. Orchid

Are you on the hunt for some fresh flower inspiration? Look no further than the stunning Orchid, with its unique and elegant petals in an array of stunning hues. And if you’re searching for a different kind of “O” flower, consider the lovely and versatile Olive.

Scientific Name:
Papaver orientale
The Oriental Poppy boasts stunning large flowers with vibrant colors, making it a popular choice for gardens and floral arrangements.
Note:

While the Oriental Poppy’s flowers are its main attraction, the plant is also known for its medicinal properties and is used in traditional medicine.

Scientific Name:
Leucanthemum vulgare

During spring, the Oxeye Daisy adds a touch of beauty to gardens with its charming white petals and yellow centers. Its simple yet stunning appearance is sure to catch the eye of any nature lover.

Morkusovic
Scientific Name:
Leucanthemum vulgare
With its simple yet cheerful appearance, the Oxeye Daisy is a charming wildflower among the other flowers that begin with the letter O. Its white petals and bright yellow center convey a sense of purity and joy.

5. Ozark Sundrop

Scientific Name:
Oenothera macrocarpa
This tough and adaptable native flower boasts bright yellow flowers that radiate in the sun, bringing a touch of sunshine to any garden. Why limit yourself to just ‘O’? Check out some gorgeous ‘N’ flowers here.

6. Mertensia maritima

Plantsiren, also known as Tradescantia spathacea or Moses-in-the-Cradle, is loved for its eye-catching purple and green leaves that create a stunning contrast. This plant is a popular choice for decoration purposes. Another beautiful ornamental plant is the Orange Lily.

Scientifically known as Lilium bulbiferum, the Orange Lily stands out from other O-named flowers with its intense color and trumpet-shaped blooms that exude passion and allure. Another flower that starts with the letter O is the Obedient Plant.

Prairiemoon
Scientific Name:
Physostegia virginiana
The Obedient Plant is a fascinating plant that can maintain its position even when it’s bent, giving it a distinctive characteristic that adds value to any garden.

9. Peony with obovate-shaped leaves

Scientific Name:
Paeonia obovata

The Obovate Peony is a stunning addition to any early summer garden with its large, bowl-shaped blooms that come in shades of soft pink all the way to bold yellows.

10. Spiderwort of Ohio

morningskygreenery
Scientific Name:
Tradescantia ohiensis
The Ohio Spiderwort is a charming addition to any natural setting, boasting lovely blue-violet blooms that add a pop of color. This plant is a top pick among the many flowers starting with the letter ‘O’. But wait, there’s more! Discover the array of ‘C’ flowers here.

11. Oleander Shrub

Scientific Name:
Rudbeckia fulgida

The Orange Coneflower, with its bright and vibrant petals, is a sight to behold. This plant is perfect for adding color to any garden or landscape. Its beautiful blooms create a stunning contrast against its lush green leaves, making it a popular choice among garden enthusiasts.

Introducing the Rudbeckia fulgida, also known as the Orange Coneflower! This plant boasts eye-catching copper-orange petals that are sure to draw in butterflies and bees, making it a top pick for those looking to attract pollinators. Don’t miss out on this beautiful addition to your garden!

The Hemerocallis fulva, also known as the Orange Daylily, is a plant famous for its numerous trumpet-shaped flowers. It is an excellent addition to any garden and can grow well in various soil types. Another notable plant is the Orange Stonecrop, which is related to the Hemerocallis fulva.

Plant Name:
Sedum kamtschaticum
The Orange Stonecrop is a great addition to rock gardens, with its succulent leaves and vibrant orange flowers that add both color and texture. It’s also featured on our roster of flower varieties starting with the letter “O.”

15. Oregon Grape is another beautiful plant to consider.

Flower enthusiasts would be delighted to know that Mahonia, also known as Oregon Grape, boasts of bright yellow blooms against holly-like foliage. Its clusters of deep purple berries are a favorite among wildlife. Meanwhile, for those looking for other flower options, here’s a list of 18 lovely flowers that start with the letter ‘L’, with Wood Sorrel or Oxalis landing on the 16th spot.

The botanical name for the Oxalis is Oxalidaceae. This lovely plant has leaves that resemble clovers and beautiful, star-shaped flowers. It’s one of the many flowers that begin with the letter O. Another stunning flower that starts with O is the Oriental Lily, also known as the Lily Stargazer.

The ‘Stargazer’ Lily, scientifically named Lilium orientalis, is a breathtaking flower with a lovely scent and unique backward-curving petals. This is just one of the many exceptional Oriental Lilies that exist. Moving on to another plant, we have the Ornamental Onion at number 18 on our list.

Americanmeadow
Plant Name:
Allium aflatunense
The Ornamental Onion is a type of plant with spherical flowers that add a striking touch to any garden bed. They are also popular among bees and butterflies, making them a great addition to any pollinator-friendly garden.
Please keep in mind that the following plants marked with “o” have unique and exquisite flowers but don’t belong to the usual flowering plants category. Even though they are part of the cactus family, their blooms are still enticing to everyone.

19. Old Lady Cactus

The scientific name for the “Old Man of the Andes” is Mammillaria hahniana. This plant features a fluffy white texture and produces charming pink or white flowers, resulting in an exceptional and captivating appearance. Additionally, this species falls under the category of flowers that begin with the letter O.

On Reddit, a particular cactus called Oreocereus celsianus is known as the “Old Man of the Andes.” This cactus has distinct, long white hairs that cover its body, and sometimes produces pink or white flowers from its woolly top. It belongs to the cactus family and is a unique addition to any collection.

Scientifically known as Tetraneuris grandiflora, this plant is the latest addition to the list of flowers that start with the letter ‘O’. It is notable for its silver-white spines and vibrant yellow or orange blooms, which make it a popular choice for desert gardens. If you want to discover more lovely flowers that begin with the letter ‘M’, check them out here.