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When do olive trees bloom?

Olive trees (Olea europaea) grow slowly and persist in mild-winter climate regions that also have hot, dry summers. The tiny creamy white flowers are fragrant and occur in clusters on branch ends among the leaves. Each blossom reveals four lobes.

Time Frame

Olive trees bloom anytime from mid-spring to early summer. Precise timing depends on local climate. The warmer the temperature, the earlier the flowering commences and it may continue for a few weeks across various branches on the tree.

Considerations

Research published in the "New Zealand Journal of Crop and Horticultural Science" in 2006 suggests that olive trees bloom best after a cool period in winter. If temperatures remain below 10 degrees Celsius, the return of warmth in spring yields more consistent, widespread flowering all at once across the tree. If winters are too mild, trees bloom slightly later in spring or early summer.

Development

Olive flower buds are already formed by fall on the branches and remain dormant across the winter. Exposure to chilly temperatures primes the buds for final development for flowering sometime in spring.

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About the Author

Jacob J. Wright became a full-time writer in 2008, with articles appearing on various websites. He has worked professionally at gardens in Colorado, Florida, Minnesota, New York, North Carolina and Pennsylvania. Wright holds a graduate diploma in environmental horticulture from the University of Melbourne, Australia, and a Master of Science in public horticulture from the University of Delaware.