Plan the perfect garden with our interactive tool →

My Oleander Is Not Blooming

...
Oleander image by Altmann from Fotolia.com

Oleander, or Nerium oleander, is an evergreen shrub that has leathery, blade-shaped leaves and profuse small flowers in clusters in white, pink and yellow. It prefers a dry, mild climate with plenty of sunshine. It grows quickly to make effective privacy hedges or screens. Generally, oleander requires little maintenance, so if your oleander is not blooming, double your efforts to provide the plant’s basic needs.

Planting Oleander

Though oleander can adapt to a variety of soils, it is best to plant them in full sun. According to the International Oleander Society, lack of sufficient sunshine can affect the plant’s ability to bloom. Plant the oleander only as deep as it was in the container. You can split the root-ball halfway from the bottom to the top of the ball to encourage root spreading. The plant will benefit from added organic matter like compost, manure or peat moss. Water the plant thoroughly after planting. Do not prune after planting.

  • Oleander, or Nerium oleander, is an evergreen shrub that has leathery, blade-shaped leaves and profuse small flowers in clusters in white, pink and yellow.
  • According to the International Oleander Society, lack of sufficient sunshine can affect the plant’s ability to bloom.

Pruning Oleander

Oleander flowers bloom on new growth, so when pruning leave enough new growth to allow buds to develop. Cut just above the leaf nodes. Prune off small suckers and broken or dead branches. For mature shrubs that will not bloom, cut back to 1/3 to stimulate vigorous growth on the branches.

Heat and Light for Oleander

Oleander blooming depends on how much sunlight is available to it. If your oleander is not blooming, make sure that other vegetation is not blocking the sunlight to plant. Trim trees and other bushes to allow sunlight to the oleander for at least four to six hours each day. Protect oleander from temperatures below 15 to 20 degrees Fahrenheit by bringing them indoors or covering. Temperatures this low will damage blooms and can kill the plant. Healthy oleander plants can tolerate high temperatures and strong sunlight.

  • Oleander flowers bloom on new growth, so when pruning leave enough new growth to allow buds to develop.
  • For mature shrubs that will not bloom, cut back to 1/3 to stimulate vigorous growth on the branches.

Water Requirements for Oleander

Oleander is drought-tolerant when well-established. Provide additional watering for younger plants which may bloom poorly or not at all if conditions are very dry. Allow water to soak in deeply. Oleanders have high water needs during blooming time, which is from early summer to autumn.

Fertilizing Oleander

Oleander generally does not require additional fertilizer, but some soil types may not have enough nutrients to support flowering. The "Houston Chronicle" recommends fertilizing oleander in the spring and in the fall with a balanced fertilizer. Additional potassium can be added to aid flowering. Signs that the oleander needs additional fertilizer include small leaf growth, short distance between nodes, no terminal growth on stems and poor blooming.

  • Oleander is drought-tolerant when well-established.
  • Provide additional watering for younger plants which may bloom poorly or not at all if conditions are very dry.

Related Articles

Growing Oleanders in Eastern North Carolina
Growing Oleanders in Eastern North Carolina
How to Plant an Oleander Hedge
How to Plant an Oleander Hedge
How to Make Mandevilla Bloom
How to Make Mandevilla Bloom
Oleanders
Oleanders
The Leaves on My Gardenia Bushes Are Turning Brown on the Ends
The Leaves on My Gardenia Bushes Are Turning Brown...
How to Make Oleanders Grow Tall
How to Make Oleanders Grow Tall
How to Train an Oleander
How to Train an Oleander
What Kind of Fertilizer for Plumbago Plants?
What Kind of Fertilizer for Plumbago Plants?
Are Hibiscus Plants Poisonous to People?
Are Hibiscus Plants Poisonous to People?
How to Care for an Andromeda Plant
How to Care for an Andromeda Plant
Problems with Bougainvilleas
Problems with Bougainvilleas
Hibiscus Care Instructions
Hibiscus Care Instructions
Bugambilia Plant Care
Bugambilia Plant Care
List of Poisonous Shrubs
List of Poisonous Shrubs
How to Fertilize Oleander
How to Fertilize Oleander
Why Are My Cannas Not Blooming?
Why Are My Cannas Not Blooming?
Garden Guides
×