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Publication #FPS-245

Helianthus debilis Beach Sunflower1

Edward F. Gilman, Sydney Park-Brown2

Introduction

The Beach Sunflower is a spreading perennial that has attractive, small sunflower-like flower heads which are borne throughout the year (Fig. 1). These showy flowers have 10 to 20, pale yellow rays that encircle a purplish-brown disk that is ½ to 1 inch wide. Different species of butterflies are attracted to these charming flowers. The 3-inch-wide flowers of this plant are followed by small seeds that readily germinate to produce plantlets. The Beach Sunflower has small, dark green, deltoid leaves that are irregularly lobed and toothed. These glossy leaves are roughly pubescent and attain a length of 4 inches.

General Information

Scientific name: Helianthus debilis
Pronunciation: heel-ee-ANTH-us DEB-bil-liss
Common name(s): Beach Sunflower
Family: Compositae
Plant type: herbaceous; perennial; ground cover
Figure 1. 

Beach Sunflower.


[Click thumbnail to enlarge.]
USDA hardiness zones: 8B through 10 (Fig. 2)
Planting month for zone 8: May; Jun; Jul
Planting month for zone 9: Apr; May; Jun; Jul; Aug
Figure 2. 

Shaded area represents potential planting range.


[Click thumbnail to enlarge.]
Planting month for zone 10 and 11: Feb; Mar; Apr; May; Jun; Jul; Aug; Sep; Oct; Nov; Dec
Origin: native to Florida
Uses: ground cover; attracts butterflies; border; mass planting; cascading down a wall; edging

Availablity: somewhat available, may have to go out of the region to find the plant

Description

Height: 2 to 4 feet
Spread: 2 to 4 feet
Plant habit: spreading
Plant density: dense
Growth rate: fast
Texture: medium

Foliage

Leaf arrangement: alternate
Leaf type: simple
Leaf margin: dentate
Leaf shape: deltoid
Leaf venation: pinnate
Leaf type and persistence: semi-evergreen
Leaf blade length: 2 to 4 inches
Leaf color: green
Fall color: not applicable
Fall characteristic: not applicable

Flower

Flower color: yellow
Flower characteristic: year-round flowering

Fruit

Fruit shape: unknown
Fruit length: unknown
Fruit cover: dry or hard
Fruit color: unknown

Fruit characteristic: attracts birds; inconspicuous and not showy

Trunk and Branches

Trunk/bark/branches: typically multi-trunked or clumping stems
Current year stem/twig color: green
Current year stem/twig thickness: medium

Culture

Light requirement: plant grows in full sun
Soil tolerances: acidic; alkaline; sand; loam;
Drought tolerance: high
Soil salt tolerances: good
Plant spacing: 18 to 24 inches

Other

Roots: not applicable
Winter interest: plant has winter interest due to unusual form, nice persistent fruits, showy winter trunk, or winter flowers
Outstanding plant: not particularly outstanding
Invasive potential: not known to be invasive
Pest resistance: no serious pests are normally seen on the plant

Use and Management

Beach Sunflower is often used as a flowering ground cover along and near the beach, and reaches a height of about 18 inches. This plant spreads by underground runners and will quickly fill in an area if provided with occasional irrigation along the beach front. Over irrigation in other locations can slow growth and cause plant decline. One or two applications of fertilizer during the year will encourage plants to establish and cover the ground quickly. It looks great when massed as a ground cover. The cut flowers are charming in arrangements indoors.

The Beach Sunflower grows best on well-drained sandy soils. This plant will not tolerate over-watering or over fertilizing and is very drought tolerant. It needs to be placed in an area that receives full sun and will endure high levels of salt spray. Beach Sunflower is an annual in those areas that have freezing temperatures in the winter; however, it will reseed itself or act as a perennial in central Florida.

Varieties and cultivars: var. cupreatus, copper-red rays; var. purpureus, pink or violet rays; var. roseus, rose colored rays; 'Dazzler', chestnut and orange head; 'Excelsior', yellow, red, brown, and purple head; 'Orion', deep yellow head.
Use seeds to propagate this lovely plant.

Pests and Diseases

No pests or diseases are of major concern.

Footnotes

1.

This document is FPS-245, one of a series of the Environmental Horticulture, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date October 1999. Revised May 2007. Reviewed June 2011. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Edward F. Gilman, professor, environmental Horticulture Department, Sydeny Park-Brown, extension agent, Hillsborough County, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, 32611


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.