Trees are essential to life on Earth. They provide oxygen, clean air, and shade, and they help reduce carbon dioxide in the atmosphere.
Trees also offer a sense of peace and tranquility, and they beautify our surroundings.
In this article, we’ll be exploring 15 trees that start with ‘O’ and their unique features and benefits.
1.Oak Tree
Oak trees are known for their longevity and size. They can live for up to 1,000 years and grow up to 100 feet tall. Oak wood is also highly prized for its strength and durability, and it’s used in furniture, flooring, and construction.
To care for oak trees, make sure to water them deeply and regularly, especially during their first few years.
Prune them in the dormant season to remove dead or damaged branches, and fertilize them in the spring.
2.Olive Tree
Olive trees have a rich history and cultural significance. They have been cultivated for thousands of years for their fruit and oil, and they have been revered in many cultures for their symbolism of peace and wisdom.
Olive oil is also known for its health benefits, and it’s used in cooking, skincare, and aromatherapy. To grow and care for olive trees, make sure to plant them in well-draining soil and in a sunny location.
Water them regularly but avoid overwatering, and prune them to maintain their shape and promote fruit production.
3.Orange Tree
Orange trees are known for their bright and juicy fruit, which is used in many culinary and medicinal applications. There are several varieties of oranges, each with their own unique flavor and uses.
To grow and care for orange trees, plant them in well-draining soil and in a sunny location. Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to remove dead or damaged branches and promote fruit production.
4.Osage Orange Tree
The Osage Orange tree, also known as the hedge apple, is a unique tree with a distinctive shape and wood. Historically, the wood has been used for fence posts and bows, and the fruit has been used to repel pests.
To care for Osage Orange trees, plant them in well-draining soil and in a sunny location.
Water them regularly but avoid overwatering, and prune them to maintain their shape.
5.Oregon Grape Tree
The Oregon Grape tree is known for its medicinal benefits and its edible berries. It’s commonly used in traditional medicine to treat skin conditions and digestive issues.
To grow and care for Oregon Grape trees, plant them in well-draining soil and in a shaded or partially shaded location.
Water them regularly but avoid overwatering, and prune them in the dormant season to remove dead or damaged branches.
6.Ostrich Fern Tree
The Ostrich Fern tree is a unique and striking fern with a feathery appearance. It’s commonly used in landscaping and gardening to add texture and depth to a garden.
To grow and care for ostrich ferns, plant them in well-draining soil and in a shaded or partially shaded location.
Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
7.Ogeechee Tupelo Tree
The Ogeechee Tupelo tree is known for its distinctive wood and ecological importance. It’s an important tree for wildlife and is commonly used in wetland restoration projects.
To care for Ogeechee Tupelo trees, plant them in well-draining soil and in a sunny or partially shaded location.
Water them regularly but avoid overwatering, and prune them to maintain their shape.
8.Ornamental Pear Tree
The Ornamental Pear tree is a beautiful tree that’s commonly used in landscaping. It’s known for its white blossoms in the spring and its colorful foliage in the fall.
To grow and care for ornamental pear trees, plant them in well-draining soil and in a sunny location.
Water them regularly but avoid overwatering, and prune them in the dormant season to maintain their shape.
9.Orchid Tree
The Orchid Tree is known for its striking and fragrant flowers, which resemble orchids. It’s commonly used in landscaping and gardening to add color and fragrance to a garden.
To grow and care for orchid trees, plant them in well-draining soil and in a sunny location. Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to maintain their shape and promote flower production.
10.Oakleaf Hydrangea Tree
The Oakleaf Hydrangea tree is a beautiful and unique shrub/tree that’s commonly used in landscaping. It’s known for its large, cone-shaped flower clusters and its stunning fall foliage.
To grow and care for Oakleaf Hydrangea trees, plant them in well-draining soil and in a shaded or partially shaded location. Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to maintain their shape and promote flower production.
11.Old Man Cactus Tree
The Old Man Cactus tree is a unique and striking cactus with long, white hairs that resemble an old man’s beard. It’s commonly used in indoor gardening and adds a fun and quirky touch to any room.
To care for Old Man Cactus trees, plant them in well-draining soil and in a sunny location. Water them sparingly, as they can withstand drought.
Fertilize them in the spring and summer.
12.Osmanthus Tree
The Osmanthus tree is known for its fragrant flowers and is commonly used in landscaping and gardening. It’s also used in tea and skincare products for its health benefits. To grow and care for Osmanthus trees, plant them in well-draining soil and in a sunny or partially shaded location.
Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to maintain their shape and promote flower production.
13.Olive-Leafed Mountain Ash Tree
The Olive-Leafed Mountain Ash tree is a unique and striking tree with delicate, olive-shaped leaves and bright red berries. It’s commonly used in landscaping and gardening and adds a touch of elegance to any garden.
To grow and care for Olive-Leafed Mountain Ash trees, plant them in well-draining soil and in a sunny location. Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to maintain their shape and promote berry production.
14.Oak-Leaf Willow Tree
The Oak-Leaf Willow tree is a beautiful and unique tree with striking, oak-shaped leaves and a fast growth rate. It’s commonly used in landscaping and gardening and adds a touch of charm to any garden.
To grow and care for Oak-Leaf Willow trees, plant them in well-draining soil and in a sunny or partially shaded location.
Water them regularly but avoid overwatering, and fertilize them in the spring and fall. Prune them in the dormant season to maintain their shape and promote growth.
15.Oolong Tea Tree
The Oolong Tea tree is a unique and important tree in the tea industry. It’s commonly grown in China and Taiwan and is known for its complex and delicious flavor. To grow and care for Oolong Tea trees, plant them in well-draining soil and in a sunny location.
Water them regularly but avoid overwatering, and fertilize them in the spring and fall.
Prune them in the dormant season to maintain their shape and promote growth.
Before You Go
Trees come in many varieties and species. If you’re interested in learning about trees that have names starting with a particular letter, check out our articles on trees by letter.
Our alphabetical tree articles allow you to browse trees starting with any letter you choose.
