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Hypericum, Golden St. John's Wort, St. Johnswort 'Sunburst'

Hypericum frondosum

Family: Clusiaceae
Genus: Hypericum (hy-PER-ee-kum) (Info)
Species: frondosum (frond-OH-sum) (Info)
Cultivar: Sunburst



Foliage Color:


Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


36-48 in. (90-120 cm)


36-48 in. (90-120 cm)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Sun to Partial Shade


Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Time:

Mid Summer

Late Summer/Early Fall



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:


San Leandro, California

Willimantic, Connecticut

Decatur, Georgia

Saint Charles, Illinois

Fort Wayne, Indiana

Lexington, Kentucky

Dracut, Massachusetts

Lexington, Massachusetts

Temperance, Michigan

Washington, Missouri

Exeter, New Hampshire

San Antonio, Texas

Springfield, Virginia

Milwaukee, Wisconsin

show all

Gardeners' Notes:


On Jun 29, 2010, ALEHH from Willimantic, CT wrote:

We received this shrub bare-rooted, in deep dormancy as a freebie when we mail ordered plants more than 15 years ago. It was about 6 inches long and looked half dead. I planted it in a bed of white convallaria alongside the driveway in what I consider to be a protected location under a large hemlock. We had no particular expectations for it, however, since the instruction sheet said that the plant is a zone 6 shrub and we live in zone 5a. Imagine my surprise when it immediately began to grow. In succeeding years the plant has filled out nicely and bloomed every year. The foliage has turned a lovely blue-green color. Regarding special care: I top dress it at least once each year when I do my roses and give it a bucket of water weakly diluted with plant food at this time, but that's ... read more


On Nov 15, 2007, Fairy1004 from (bestest fairy)Temperance, MI (Zone 5b) wrote:

Mine started blooming in the end of June & bloomed for a month straight!! Very prolific bloomer with anywhere from 5 -12 blooms at a time.

Bees love it, so I wouldn't advise putting it close to a house. VERY hardy-when we 1st moved in to our housen we thought we had killed it (fell on it), and it just bounced right back and grows at a rapid pace-has to be trimmed twice a year.

Wouldn't get rid if it though, it's too pretty and adds the color when a lot of other things are done blooming:)