Light Needs
Mature Height
Mature Spread
Growing Zones
Sunburst St. John's Wort (Hypericum frondosum 'Sunburst') is a deciduous shrub grown in USDA zones 5-8. Sunburst St. John's Wort grows to a height of 2-3 feet tall and spreads to 3-4 feet wide. This plant flowers June through October with unique blooms reminiscent of fireworks. These sunshine-yellow flowers are contrasted by densely packed, greenish-blue foliage. Late in the summer, berries will appear when the blooms fade.
Sunburst St. John's Wort grows densely in an upright, mounded growth habit. It is fairly low maintenance and excellent for hedges. Sunburst St. John's Wort has some deer and rabbit resistance, and is drought tolerant when established.
Sunburst St. John's Wort Care
Sunburst St. John's Wort grows best in nutrient-rich, loamy soils but will tolerate most average, well-draining soil types. Avoid overwatering this plant; keep the soil moist but not soggy. For optimal growth, provide this shrub with at least 4-6 hours of sunlight daily.
Sunburst St. John's Wort benefits from annual pruning in late winter or early spring. Apply compost or a balanced fertilizer in early spring. Mulch the root zone to provide insulation over the winter.
Sunburst St. John's Wort Spacing
Sunburst St. John's Wort is good for smaller spaces and low hedges. Leave about 3-4 feet of space between plants.
Sunburst St. John's Wort Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 to 8 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Part Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 2-3 Feet
- Mature Spread
- 3-4 Feet
- Growth Habit
- , Upright
- Water Needs
- Dry
Flowers & Foliage
- Flower Colors
- , Yellow
- Flower Description
- Yellow
- Bloom Time
- Summer to Early Fall
- Blooms On
-
New Wood
?
"Blooms on" tells you which stems produce flowers, which decides when it's safe to prune.
- New Wood: Flowers form on stems that grow this season. Prune in late winter or early spring without losing blooms.
- Old Wood: Flower buds form on last year's stems. Prune right after flowering. Pruning in fall or early spring removes next year's blooms.
- Both New and Old Wood: Blooms on last year's stems and again on new growth, so it flowers even after a hard winter or a mistimed pruning. Prune lightly after the first flush of blooms.
- When to Prune
- Late winter to early spring, before new growth starts
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Semi-Evergreen, Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Flowering
Garden Benefits
Plant Overview
- Common Name
- Sunburst St. John's Wort
- Botanical Name
- Hypericum frondosum 'Sunburst'
- Plant Type
- Shrub
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!