Names Start With O The List of Marvelous Flowers

O is the 15th letter of the Latin alphabet. When someone asks, “What are flowers that start with O?”, what comes first into your mind? Is it an orchid? Well, orchids may be the most popular, but they are not the only ones.

Nature grants us many appealing blooms. Finding flowers that start with O is not a complicated mission. But perhaps, some of you may have never heard of these flowers before. Whether you’re looking for more flowers to add to your collection or simply just passing through, here is the list of flowers beginning with O alongside what they represent.

Table of Contents

List of flowers beginning with o.

1. Oak-leaf Hydrangea (Hydrangea)

flowers beginning with o Oak-leaf Hydrangea

Oak-leaf hydrangea is a perennial shrub native to Asia. What makes this four-petaled flower unique is, they can change color depending on the pH level! Plant them in acidic soil, and they will produce blue blooms. Plant them in neutral and basic soil, they will produce red or pink blooms. This unique trait makes oak-leaf hydrangea a perfect fit if you’re looking for flowers that can naturally change their color. Aside from its uniqueness and beauty, remember that oak-leaf hydrangea has a low toxicity level.

What does Oak-leaf Hydrangea represent?

Oak-leaf hydrangea represents many things, depending on its blooms’ color. Pink and red oak-leaf hydrangea is a symbol of the heart’s emotion while blue oak-leaf hydrangea is a symbol of guilt and apology.

What is basic Oak-leaf Hydrangea care?

They need both full sun and partial shade and moist, heavy soil like clay.

How big do Oak-leaf Hydrangea grow?

About 60 to 90 centimeters tall and spread as wide as 182 centimeters.

What is Oak-leaf Hydrangea commonly used for?

They can be grown both indoors and outdoors, as well as a window box plant.

2. Ox Tongue (Gasteria obliqua)

Gasteria obliqua flowers that name start with letter O

Ox tongue is a small perennial succulent and house plant that originated from South Africa. The elongated oval shape of its foliate is almost identical to the tongue of an ox–hence it got its name. Ox tongue have tiny, tubular red-green flowers that are shaped like chili.

What does Ox Tongue represent?

In African culture, the ox tongue was believed to bring charms and fortune to whoever planted it.

What is basic Ox Tongue care?

They love partial shade with good drainage soil.

How big does Ox Tongue grow?

No more than 30 inches.

What is Ox Tongue commonly used for?

Can be grown as a container and house plant.

3. Oberg Ice Plant (Delosperma ‘Oberg’)

plants name begin with letter o - Oberg Ice Plant

The Oberg ice plant is a perennial succulent with daisy-like flowers. Another plant originated from South and East Africa. If you’re looking for a small, green succulent that produces daisy-like flowers, you shall add the Oberg ice plant to your wishlist now. 

What does Oberg Ice Plant represent?

Similar to the ox tongue, the Oberg ice plant is a symbol of good fortune. However, oberg ice plant also carries the meaning of coldness and rejection.

What is basic Oberg Ice Plant care?

They thrive under full sun and sandy soil with good drainage.

How big does Oberg Ice Plant grow?

No more than 30 inches.

What is Oberg Ice Plant commonly used for?

Container plant, ornamental plant, rock-themed garden, as well as window box plant.

4. October Hibiscus (Hibiscus sabdariffa)

October Hibiscus - flower which name start with letter o

October hibiscuses are the next flowers that start with O. This Africa-native plant can be grown as a perennial and an annual. They’re easy to maintain and produce 5-cup-petaled salmon, yellow, or white blooms, as well as edible berry-like fruits.

What does October Hibiscus represent?

Same as oak-leaf hydrangea, October hibiscus carries different meanings depending on its color. But overall, hibiscus has long been associated with positive emotions like joy, romantic love, friendship, beauty, and passion.

What is basic October Hibiscus care?

They love warm areas with direct full sun and soil with good drainage.

How big does October Hibiscus grow?

Around 60 centimeters to 240 centimeters or more.

What is October Hibiscus commonly used for?

Container plant (for dwarf variety only), ornamental plant, and pollinator-themed garden.

5. October Daphne (Hylotelephium sieboldii)

October Daphne flower names starting with O
beautiful flowering succulent with the letter O name.

October daphne makes it to the list of flower names starting with O. This small perennial succulent is native to Japan. They produce colorful leaves and flowers. The leaf color of October daphne can be blue, grayish silver, green, pink, or burgundy. While the bloom’s color ranges from sakura pink, orange, yellow, and white, to lavender.

What does October Daphne represent?

October daphne is the symbol of friendship and immortal love for the plant’s ability to live in a diverse environment.

What is basic October Daphne care?

They grow under full sun and partial shade in very dry soil but with good drainage.

How big does October Daphne grow?

No more than 30 centimeters.

What is October Daphne commonly used for?

Ornamental plant, window box plant, container plant, rock-themed garden.

6. Odorata (Nymphaea odorata)

Nymphaea  Odorata
perennial flowering plants whose names start with O

Odorata is an aquatic and perennial plant from Eastern North America. They produce very fragrant white blooms with a yellow center and orbicular, shiny, and broad leaves known as lily-pad.

What does Odorata represent?

Odorata have sacred meanings for Buddhists and Hinduism since they represent rebirth and renewal–coming from the unique trait of this plant that closes at night and blooms the next morning.

What is basic Odorata care?

Acid and neutral soil under direct full sun.

How big does Odorata grow?

Odorata’s foliage can grow as wide as 120 centimeters.

What is Odorata commonly used for?

Ornamental pond plant.

7. Oilcloth Flower (Anthurium scherzerianum)

Oilcloth Flower flower beginning with O

The oilcloth flower is a herbaceous perennial, tropical spring flower beginning with O native to Costa Rica. They produce blooms with bright red, pale pink, reddish-orange spathe, and red, green, or yellow spadix–along with glossy, heart-shaped foliage.

What does Oilcloth Flower represent?

The oilcloth flower is the epitome of abundance, love, beauty, and luck.

What is basic Oilcloth Flower care?

Although originated from tropical areas, this low-maintenance flower prefers partial shade over full, direct sunlight with moist soil.

How big does Oilcloth Flower grow?

Around 60 to 90 centimeters.

What is Oilcloth Flower commonly used for?

Container and ornamental plant.

8. Oil-seed Camellia (Camellia oleifera)

Camellia oleifera

Oil-seed Camellia is a shrub native to Southeastern Asia. Their tiny, pink, and white blooms produce such a pleasant fragrance. The seeds are edible and can be processed through high-temperature cooking. In some parts of Asia, oil-seed camellia also has been used as mixing for cosmetics, oils, and soaps.

What does Oil-seed Camellia represent?

Oil-seed camellia carries the meaning of adoration and longing for someone you love or like.

What is basic Oil-seed Camellia care?

Oil-seed camellia is best planted in an area with partial shade and high organic matter soil.

How big do Oil-seed Camellia grow?

They can grow as tall and as wide as 4 meters (400 centimeters).

What is Oil-seed Camellia commonly used for?

Commonly used to make oils for fragrance, soap, skincare, cosmetics, and any other health purposes.

9. Old Pheasant’s Eye (Narcissus poeticus)

Old Pheasant’s Eye

Old pheasant’s eye is a fragrant spring perennial that originated in Europe. The blooms are yellow and white with green and yellow gradient foliage. Similar to oak-leaf hydrangea, old pheasant’s eye also has a low toxicity level.

What does Old Pheasant’s Eye represent?

Aside from its famous Narcissus mythology, the old pheasant’s eye is also well-known as the symbol of new life and new beginnings.

What is basic Old Pheasant’s Eyecare?

They can thrive in both sunny and partial shade and love moist but not too-soaky soil.

How big does Old Pheasant’s Eye grow?

About 30 to 60 centimeters.

What is Old Pheasant’s Eye commonly used for?

Old pheasant’s eye is broadly used for fragrance and cutting flowers. Can be grown in small spaces as well, such as containers and window boxes.

10. Oldfield Aster (Symphyotrichum pilosum)

Oldfield Aster flowers that start with O

Still looking for flowers that start with O? Good! Our next star is oldfield aster, a perennial wildflower whose natural habitat is in North America. Oldfield aster has 6 to 20 white or lavender petals per bloom with a greenish-yellow center. They’re small, low-maintenance, and attract pollinators like bees and butterflies.

What does Oldfield Aster represent?

Oldfield aster has a symbol of wisdom, faith, and love. In Greek mythology, it’s said that the oldfield aster is one of many flowers that decorate the Gods’ altar.

What is basic Oldfield Aster care?

Place them in a place with direct full sun and minimum water. 

How big does Oldfield Aster grow?

Oldfield aster is a low-maintenance plant that grows up to 120 centimeters tall.

What is Oldfield Aster commonly used for?

They can be planted both indoors and outdoors. For outdoor gardens, they can be the best pick for pollinator-themed gardens, kids’ gardens, as well as sunny-themed gardens.

11. Opium Poppy (Papaver somniferum)

Opium Poppy flowers beginning with O

The following flowers beginning with O are opium poppies. This European native plant can be both annual and perennial with blooms of blue, shades of pink, or white color. A little fun fact, the word ‘somniferum’ means sleep bringer in Latin, as opium poppy has a necrotic effect that makes you sleepy if consumed.

What does Opium Poppy represent?

Because of its necrotic effect, the opium poppy has been seen as the symbol of death, sleep, and peace.

What is basic Opium Poppy care?

Opium poppy needs an area with full sun and rich-nutrient soil to grow.

How big does Opium Poppy grow?

About 100 to 500 centimeters (yes, they are massive).

What is Opium Poppy commonly used for?

The opium poppy is well-known as the main ingredient for narcotics such as morphine and heroin. Please take note that growing this plant may be illegal in most countries.

12. Oxford Blue (Eryngium bourgatii)

Eryngium bourgatii

Did you know that oxford blue can get bluer if they’re placed in an area with intense sunlight? Yes, that’s a fact. Oxford blue loves dry soil and warm sunlight. This Mediterranean native produces star-looking blooms with violet to blue colors.

What does Oxford Blue represent?

Because of its blooms’ shape and colors, the oxford blue flower has been seen as the symbol of joy and attractiveness.

What is basic Oxford Blue care?

An area of full sun. Another fun fact, they almost don’t need watering at all and will benefit from dry soil.

How big does Oxford Blue grow?

About 45 to 50 centimeters tall and 30 to 45 centimeters wide.

What is Oxford Blue commonly used for?

Ornamental garden plant. If you’re looking for pollinators like honey bees, oxford blue is one of your best chances since honey bees attract the most to blue flowers.

13. Ocean Pearl (Agrostemma githago)

white flowers that start with O Ocean Pearl (Agrostemma githago)

If you’re looking for white flowers that start with O and have an unusual blooms appearance, you should try to plant ocean pearls. Ocean pearl is a white variety of corn cockle–an annual herb native to Europe. They produce unique-looking blooms with linear lines that spread from the base part of each petal to the outer part. 

What does Ocean Pearl represent?

Known for its simple yet beautiful white blooms, the ocean pearl has a symbol of purity and innocence.

What is basic Ocean Pearl care?

They thrive well in areas with full sun and partial shade with moist, good drainage soil.

How big does Ocean Pearl grow?

Around 30 to 60 centimeters tall and 2.5 centimeters blooms.

What is Ocean Pearl commonly used for?

Ocean pearl along with its parent plant has been used as an ornamental plant, for example, in the cottage-themed garden.


Here you go, a list of flowers that start with O. To conclude, most of these flowers are not difficult to maintain. Whatever your garden theme is, whether it’s located in a pond, in the backyard of your house, or even just by your window, you can mix and match these flowers with meaningful symbolism on them. Who knows, some of these flowers that carry the symbol of luck may bring Fortune Goddess to your house!

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