Plan the perfect garden with our interactive tool →

The Pollination of Orange Trees

...
orange tree in the garden image by Daria Miroshnikova from Fotolia.com

All flowering plants use insects and other naturally occurring elements to transfer genetic material from one organism to another in reproduction. This process is called "pollination" and allows for genetic variation and survival for many plants across the plant. Orange trees are an example of this group and use several methods to ensure pollination.

Citrus Flowers

Most citrus trees, including oranges, begin forming flower buds in early winter until spring. Since 99 percent of these flowers fall off without ever resulting in the formation of fruit, plants become largely dependent on temperature, moisture and adequate water. Since flowering and the creation of new leaves after winter uses a large amount of resources, trees must ensure a variety of possibilities for reproduction and not rely on just one.

Parthenocarpy

It is possible for some orange trees, such as the Washington navel orange tree, to develop fruit without pollination occurring. When fruits develop without the use of either embryo or endosperm, the resulting fruits are produced without seeds. Since these fruits are seedless, they are unable to be used in reproduction for the organism. This is called parthenocarpy.

  • All flowering plants use insects and other naturally occurring elements to transfer genetic material from one organism to another in reproduction.
  • It is possible for some orange trees, such as the Washington navel orange tree, to develop fruit without pollination occurring.

Pollination

The most common method of pollination among orange trees is done through insects, quite often bees. Drawn to the sweet-smelling blossoms, the insects will enter the flower and unknowingly transfer pollen from one bloom or plant to another. Another method of pollination is done with the help of gusts of wind, which carry the pollen grains of the blooms between flowers.

Cross-Pollination

Not all oranges can develop through ordinary pollination, when pollen is transfered between a single tree's blossoms. Allogamy occurs in certain varieties of orange trees, such as the Clementine mandarin trees, which need pollen to transfer between the blossoms of two fully developed trees. The flowers found on these plants tend to have taller stamens to better ensure the spread of pollen between organisms. Orange growers are unable to perform artificial pollination and rely heavily on insects to transfer pollen.

  • The most common method of pollination among orange trees is done through insects, quite often bees.
  • Not all oranges can develop through ordinary pollination, when pollen is transfered between a single tree's blossoms.

Development

Pollination for citrus trees generally occur when the flowers begin to bloom. This is typically between the seasons of early winter throughout late spring. Once pollinated, it can take an orange tree anywhere from five to 18 months to produce viable fruit that is ready to be harvested. Most citrus fruit can be left on the tree for large periods of time after being fully grown without the danger of over-ripening.

Related Articles

Cross Pollination of Citrus Trees
Cross Pollination of Citrus Trees
Rate of Growth for an Orange Tree
Rate of Growth for an Orange Tree
If Navel Oranges Have No Seeds How Do We Grow More?
If Navel Oranges Have No Seeds How Do We Grow More?
Interesting Facts About Orange Trees
Interesting Facts About Orange Trees
Types of Flowers in the Philippines That Are Pollinated by Bees
Types of Flowers in the Philippines That Are Pollinated...
How Does a Citrus Tree Reproduce?
How Does a Citrus Tree Reproduce?
How to Prune Dwarf Citrus Trees
How to Prune Dwarf Citrus Trees
How to Cross Breed an Apple
How to Cross Breed an Apple
Evergreen Fruit Trees
Evergreen Fruit Trees
Which Oranges Are Seedless?
Which Oranges Are Seedless?
Facts About Olive Tree Flowers
Facts About Olive Tree Flowers
Which Flowering Trees Bloom the Longest?
Which Flowering Trees Bloom the Longest?
How to Store Pears in the Fridge
How to Store Pears in the Fridge
Classification of Orange Trees
Classification of Orange Trees
Peach Trees for Florida
Peach Trees for Florida
Blossom Stages of the Orange Tree
Blossom Stages of the Orange Tree
Good Pollinators for Bing Cherry Trees
Good Pollinators for Bing Cherry Trees
Garden Guides
×