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)
On Jan 18, 2005, Toxicodendron from Piedmont, MO (Zone 6a) wrote:
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 2 to 5 feet tall and wide in our climate. It blooms from June to September; in sun to part shade; dry or wet soil.
This plant is a good nectar source for bees, and is attractive enough to incorporate into the landscape.
On Aug 15, 2004, neogard from Toronto Canada wrote:
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 anywhere. It's probably been there since the house was built in 1949. It is very contained, I have other shrubs that spread much faster and further than this one. Everyone comments on how pretty the flowers are. It doesn't need much care. The soil in my area is quite sandy since I'm very close to Lake Ontario. I trimmed it back last year, but didn't have to this year (I've only been in the house 2 years). Hard to believe this is a weed.
On Jul 29, 2003, vagardener from Springfield, VA wrote:
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. They did not overwinter well this year, and I thought they were lost. They came back very strongly after I severely pruned them back to the ground. They require very little maintenance, except a good haircut in the spring.
This plant has been said to grow in the following regions:
Florence, Alabama Deer, Arkansas Dyer, Arkansas Baldwin City, Kansas Piedmont, Missouri Lakewood, Ohio Bell, Oklahoma Boring, Oregon Arcadia Lakes, South Carolina Memphis, Tennessee Sweetwater, Tennessee Dallas, Texas Fredericksburg, Texas Sugar Land, Texas Arlington, Virginia West Springfield, Virginia Seattle, Washington (2 reports) Liberty, West Virginia