Hypericum Species, Shrubby St. Johns Wort, Cinnamon Stick, St. Johnswort

Hypericumprolificum

Family
Hypericaceae (hy-PER-ee-KAY-see-ee)
Genus
Hypericum (hy-PER-ee-kum)
Species
prolificum (pro-LIF-ih-kum)
Synonym
Hypericum cryptopetalum
Hypericum foliosum
Sun Exposure
Sun to Partial Shade
Foliage
Deciduous
Provides Winter Interest
Smooth
Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
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)
Danger
Parts of plant are poisonous if ingested
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Shrubs
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Florence, Alabama

Deer, Arkansas

Dyer, Arkansas

Romeoville, Illinois

Baldwin City, Kansas

Piedmont, Missouri

Troy, Montana

Geneva, New York

Lakewood, Ohio

Stilwell, Oklahoma

Boring, Oregon

Columbia, South Carolina

Memphis, Tennessee

Sweetwater, Tennessee

Dallas, Texas

Fredericksburg, Texas

Sugar Land, Texas

Arlington, Virginia

Blacksburg, Virginia

Springfield, Virginia

Seattle, Washington(2 reports)

Liberty, West Virginia

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Gardener's Notes:

9
positives
0
neutral
0
negative
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R
Downingtown, PA | July 2016 | positive

I haven't seen this species in the wild yet, but I have seen a few planted in landscapes in the Chicago, IL area. I think some more fancy...Read More

C
Blacksburg, VA | July 2015 | positive

I found this plant growing well and abundantly in the wild on the roadside edges in the Jefferson National Forest, Montgomery County, Virginia.

S
Liberty, WV (Zone 6b) | October 2009 | positive

The flowers of the plant are used to treat depression, anxiety, and insomnia. :) Pretty and useful!

L
Memphis, TN (Zone 7b) | May 2009 | positive

Well suited to the variable climate in Memphis, TN. A recommended native plant for use in West TN by the Tennessee Exotic Pest Plant Council.

S
Florence, AL | September 2008 | positive

Great plant, bees and butterflies love it. Low Maint. and drought tolerant.

K
K
Sugar Land, TX (Zone 9a) | May 2006 | positive

I've had mine for about 3 years and it is a beautiful shrub. It blooms for about a month and a half during the summer in full Texas sun!

T
Piedmont, MO (Zone 6a) | January 2005 | positive

We are fortunate to have Shrubby St. John's Wort as a native plant in our area of Southeast Missouri. It has woody stems and ranges from...Read More

N
| August 2004 | positive

I have a large hypericum prolificum in my front garden. I'm just identifying it now from your picture. I haven't seen another one anywh...Read More

V
Springfield, VA | July 2003 | positive

I planted two of these shrubs a couple of years ago between some azaleas to provide summer color. They are thriving in almost full sun. ...Read More

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