Comprehensive List of all Garden Plants starting with O

List of Plants Starting With O

In this detailed guide, we delve into the characteristics and care requirements of a diverse range of plants that start with the letter O from Obregonia to Ozothamnus and everything in between. You'll find information on soil preferences, sunlight exposure, watering needs, and more, ensuring that you can provide the ideal conditions for each plant to thrive. By selecting the right plants for your garden, you can create a landscape that is not only visually stunning but also healthy and sustainable. For a complete listing of plants be sure to go back to our Plant Variety Database

Obregonia
A small, slow-growing cactus with a unique geometric shape, native to Mexico.

Common Name: None
Ochagavia
A genus of flowering plants in the bromeliad family, known for their spiky leaves and bright flowers.

Common Name: None
Ochna
A genus of shrubs and small trees with bright yellow flowers and attractive black berries.

Common Name: Mickey Mouse Plant
Ocimum
A genus of aromatic herbs, including basil, known for their culinary and medicinal uses.

Common Name: Basil
Odontioda
A hybrid orchid genus with colorful and often fragrant flowers, popular among orchid enthusiasts.

Common Name: None
Odontocidium
A hybrid orchid genus combining features of Odontoglossum and Oncidium, known for their striking blooms.

Common Name: None
Odontoglossum
An orchid genus with beautiful, large, and often fragrant flowers, native to Central and South America.

Common Name: None
Odontonema
A genus of flowering plants known for their bright red or pink tubular flowers, attracting hummingbirds.

Common Name: Firespike
Odontonia
A hybrid orchid genus with showy, long-lasting flowers, popular in horticulture.

Common Name: None
Oemleria
A deciduous shrub with clusters of white flowers and blue-black fruit, native to North America.

Common Name: Osoberry
Oenanthe
A genus of flowering plants in the carrot family, often found in wetlands.

Common Name: Water Dropwort
Oenothera
A genus of flowering plants with bright yellow blooms, known for their evening opening.

Common Name: Evening Primrose, Sundrops
Olea
A genus of small trees and shrubs, including the olive tree, valued for their fruit and oil.

Common Name: Olive
Olearia
A genus of shrubs and small trees with daisy-like flowers, native to Australasia.

Common Name: Daisy Bush
Olneya
A genus of flowering plants in the legume family, native to the Sonoran Desert.

Common Name: Ironwood
Olsynium
A genus of flowering plants in the iris family, with grass-like leaves and delicate flowers.

Common Name: None
Omphalodes
A genus of herbaceous plants with blue or white flowers, resembling those of forget-me-nots.

Common Name: Navelwort
Omphalogramma
A genus of perennial herbs with attractive, usually blue or purple flowers.

Common Name: None
Oncidium
A large genus of orchids with bright, showy flowers, often known as dancing ladies.

Common Name: Dancing Ladies
Onoclea
A genus of ferns with unique, deeply lobed fronds, typically found in moist areas.

Common Name: Sensitive Fern
Ononis
A genus of flowering plants with small, pink or yellow flowers, often found in dry, sandy soils.

Common Name: Restharrow
Onopordum
A genus of thistles with large, spiny leaves and purple or white flowers, native to Europe and Asia.

Common Name: Scotch Thistle
Onosma
A genus of herbaceous plants with hairy leaves and tubular, often yellow flowers.

Common Name: Golden Drop
Oophytum
A genus of succulent plants with rounded, egg-shaped leaves, native to South Africa.

Common Name: None
Ophiopogon
A genus of evergreen perennial plants with grass-like leaves and small, bell-shaped flowers.

Common Name: Lilyturf
Ophrys
A genus of orchids known for their distinctive flowers, which mimic the appearance of insects.

Common Name: Bee Orchid
Ophthalmophyllum
A genus of succulent plants with transparent windows on their leaves, native to South Africa.

Common Name: Window Plant
Oplismenus
A genus of grasses with creeping stems and small, inconspicuous flowers.

Common Name: Basket Grass
Opuntia
A genus of cacti with flat, segmented pads and often large, colorful flowers.

Common Name: Prickly Pear
Orbea
A genus of succulent plants with star-shaped, often spotted flowers, native to Africa.

Common Name: Carrion Flower
Orbeopsis
A genus of succulent plants with large, star-shaped flowers that emit a carrion-like odor.

Common Name: None
Orchis
A genus of orchids with striking, often fragrant flowers, commonly found in temperate regions.

Common Name: None
Oreocereus
A genus of columnar cacti with dense spines and often red or yellow flowers, native to South America.

Common Name: Old Man Cactus
Origanum
A genus of aromatic herbs, including oregano and marjoram, used in cooking and herbal medicine.

Common Name: Oregano, Marjoram
Orixa
A genus of shrubs with glossy leaves and small, fragrant flowers, native to Asia.

Common Name: None
Ornithogalum
A genus of perennial plants with star-shaped white or yellow flowers, often used as ornamentals.

Common Name: Star of Bethlehem
Ornithophora
A genus of small, epiphytic orchids with tiny, intricate flowers, native to South America.

Common Name: None
Orontium
A genus of aquatic plants with unique, club-shaped yellow inflorescences.

Common Name: Golden Club
Orostachys
A genus of succulent plants with rosettes of fleshy leaves and tall flower spikes.

Common Name: Duncecap
Oroya
A genus of cacti with globular shapes and vibrant flowers, native to the Andes.

Common Name: None
Ortegocactus
A genus of small cacti with unique, textured surfaces and bright yellow flowers.

Common Name: None
Orthophytum
A genus of bromeliads with rosettes of spiny leaves and distinctive inflorescences.

Common Name: None
Orthrosanthus
A genus of flowering plants with iris-like leaves and clusters of blue or white flowers.

Common Name: Morning Iris
Orychophragmus
A genus of flowering plants in the mustard family, with purple or violet flowers.

Common Name: Chinese Violet Cress
Oryza
A genus of grasses that includes rice, one of the most important staple foods worldwide.

Common Name: Rice
Osbeckia
A genus of flowering plants with pink or purple flowers, often found in tropical and subtropical regions.

Common Name: None
Osmanthus
A genus of shrubs and small trees with fragrant white or yellow flowers, often used in perfumery.

Common Name: Sweet Olive
Osmarea
A small genus of flowering plants with aromatic leaves and tiny flowers.

Common Name: None
Osmaronia
A genus of flowering plants in the rose family, known for their white flowers and red fruit.

Common Name: Indian Plum
Osmunda
A genus of ferns with large, feathery fronds, often found in moist, shady areas.

Common Name: Royal Fern
Osteomeles
A genus of shrubs with white flowers and edible berries, native to East Asia.

Common Name: None
Osteospermum
A genus of flowering plants with daisy-like blooms in various colors, popular in gardens.

Common Name: African Daisy
Ostrowskia
A genus of flowering plants with large, bell-shaped flowers, native to Central Asia.

Common Name: Giant Bellflower
Ostrya
A genus of deciduous trees with hop-like fruit clusters, found in temperate regions.

Common Name: Hop Hornbeam
Othonna
A genus of succulent plants with yellow, daisy-like flowers, native to South Africa.

Common Name: None
Ourisia
A genus of herbaceous plants with tubular flowers, often found in moist, mountainous areas.

Common Name: None
Oxalis
A genus of herbaceous plants with clover-like leaves and variously colored flowers.

Common Name: Shamrock, Sorrel
Oxydendrum
A genus of deciduous trees with sour-tasting leaves and white, bell-shaped flowers.

Common Name: Sourwood
Ozothamnus
A genus of shrubs with aromatic leaves and clusters of small, white or pink flowers, native to Australia and New Zealand.

Common Name: Rice Flower

Gardening Tips for Beginners and Experts

Embarking on a gardening journey with plants starting with the letter O opens up a world of unique and beautiful flora. From the intriguing geometric shapes of Obregonia to the aromatic and versatile Ozothamnus, each plant brings its own charm and benefits to your garden. Whether you're a seasoned gardener or a beginner, understanding the specific needs of these plants is crucial for their success.

Explore how iconic plants that start with the letter O can transform your garden into a vibrant, lush paradise. Discover the beauty and uniqueness these plants offer, and enhance your gardening experience. Happy gardening!