1. Orchid
Orchids are one of the two most immense families of flowering plants, with an estimated 28.000 species and over 100.000 hybrids and cultivars. Most Orchids have a racemose inflorescence.
![Orchid](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Orchid.jpg)
2. Oriental Lily
Created by crossing interspecific hybrids and some certain Lilies species, Oriental Lilies have intensely fragrant, colorful flowers with striking spots in mid to late summer.
![Oriental Lily](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Oriental-Lily.jpg)
3. Old Man of the Andes
The spiky body of Old Man of the Andes is covered with white, beard-like hairs that give the appearance of a frail elderly, hence the name. It has red flowers and stems up to 3m tall.
![Old Man of the Andes](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Old-Man-of-the-Andes.jpg)
4. Obovate Peony
Suited to open woodlands and shady gardens, Obovate Peony or Paeonia obovata has rose, purple-red or white, cup-shaped flowers and is appropriate as a low herbaceous hedge.
![Obovate Peony](https://freerangefarmers.com.au/wp-content/uploads/2021/09/sandy-millar-h90u8EjN1OU-unsplash.jpg)
5. Ox-Eye Daisy
Highly vigorous and disease-free, Ox-Eye Daisy is known for its floriferous display of white single blooms with yellow centers. This invasive weed has several names, including Marguerite, Field Daisy, and Dog Daisy.
![Ox-Eye Daisy](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Ox-Eye-Daisy.jpg)
6. Oyster Plant
The Oyster Plant is a widespread compact houseplant distinguished by its elongate, lanceolate, striped, green leaves with purplish undersides and small, pink or white flowers.
![Oyster Plant](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Oyster-Plant.jpg)
7. Oregon Grape
Oregon Grape bears dense clumps of yellow blooms, followed by blackish-blue, distasteful berries. In winter, its foliage takes on shades of scarlet to burgundy, striking in the grey landscape.
![Oregon Grape](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Oregon-Grape.jpg)
8. Ohio Spiderwort
Ohio Spiderwort (Bluejacket) is characterized by its violet-blue blossoms tending to flower in the morning and shrivel from the mid-day heat. This aggressive plant is not suitable for a small garden.
![Ohio Spiderwort](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Ohio-Spiderwort.jpg)
9. Osteospermum
Osteospermum species (African Daisies) are perfect for those who desire long-lasting, fragrant, colorful blooms for their landscape. These annuals bloom freely in spring, fall, or cool summer climates.
![Osteospermum](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Osteospermum.jpg)
10. Oriental Poppy
Oriental Poppies (Papaver orientale) feature large, silky-satin blossoms in shades of orange, red, pink, or white. They set your landscape ablaze with striking visuals from late spring to early summer.
![Oriental Poppy](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Oriental-Poppy.jpg)
11. Ornamental Onion
In the spring and early summer, Ornamental Onions or Alliums are topped with cheerful spherical clusters of flowers in shades of purple and pink in a long-lasting display that can make you wow.
![Ornamental Onion](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Ornamental-Onion.jpg)
12. Obedient Plant
Otherwise known as False Dragonhead, the Obedient plant has snapdragon-like, pink to lavender blooms in terminal spikes. Each flower is “obedient” and can stay in a new position if bent, making it fun to play with.
![Obedient Plant](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Obedient-Plant.jpg)
13. Oleander Plant
The Oleander plants (Nerium oleander) are tough, long-blooming, ornamental shrubs with beautiful clusters of red, pink, or white flowers and can be trained into single-trunk trees.
![Oleander Plant](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Oleander-Plant.jpg)
14. Old Lady Cactus
Thriving in indoor settings with just a bit of care, Old Lady Cactus or Mammillaria hahniana features precious reddish-purple blossoms on stems covered with white bristles and spines.
![Old Lady Cactus](https://freerangefarmers.com.au/wp-content/uploads/2021/09/Old-Lady-Cactus.jpg)