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Helianthus annuus 'Sonja' Sonja Sunflower

Edward F. Gilman, Ryan W. Klein, and Gail Hansen

Release Date: 2/11/2024

DOI: 10.32473/edis-fp244-1999

Agriculture

Abstract

This document provides an overview of the ‘Sonja’ sunflower (Helianthus annuus ‘Sonja’), a short-lived annual plant known for its large, striking flowers. It details the plant’s characteristics, including its height, spread, and flower size, as well as its growing conditions and pest resistance. The document also compares ‘Sonja’ with other sunflower cultivars like ‘Valentine’, ‘Floristan’, and ‘Hallo’, highlighting their differences in appearance and susceptibility to pests. Additionally, it offers practical information on planting and maintaining sunflowers in Florida, emphasizing their seasonal growth patterns and potential uses in landscaping. Original publication date October 1999.

About this Publication

This document is FPS-244, one of a series of the Department of Environmental Horticulture, UF/IFAS Extension. Original publication date October 1999. Revised October 2023. Visit the EDIS website at https://edis.ifas.ufl.edu for the currently supported version of this publication.

About the Authors

Edward F. Gilman, professor emeritus; Ryan W. Klein, assistant professor, arboriculture; and Gail Hansen, professor, sustainable landscape design; Department of Environmental Horticulture, UF/IFAS Extension, Gainesville, FL 32611.