Light Needs
Mature Height
Mature Spread
Growing Zones
Red Star™ St. John's Wort, or Hypericum Inodorum Red Star™ is a deciduous shrub with masses of yellow buttercup flowers that bloom in the spring. These cheery clouds of flowers are followed by rich glossy berries, which is where Red Star™ gets its name. Both are excellent to provide structure and width to cut flower arrangements and bouquets. Red Star™ foliage has ovate, green leaves that form into an attractive 2.5 to 3 foot mound with floating berries on wiry stems.
Red Star™ St. John's Wort is rust resistant and easy to grow. It grows at a medium rate, and its branches spread upright. It is low-maintenance and generally pest and disease free. This shrub is deer and rabbit resistant and perfect for long-lasting color in your garden. They make stunning hedges and borders when grown together.
Red Star™ St. John's Wort Care
This beautiful shrub prefers dry to average watering and is drought-tolerant. They work great in low-water gardens. Red Star™ St. John's Wort can tolerate most types of soils, but needs to have very good drainage. It should be planted in areas with full sun or partial shade, in an area with moderate shelter from damaging winds.
You can prune your Red Star™ St. John's Wort as soon as it has finished blooming, or in late winter when the berries start to fall. Cutting back dead branches and leaves before new growth can start is ideal. You should prune off around one third of the total shrub. Pruning your Red Star™ St. John's Wort will increase its flowering in the future. Consider a thick mulch at the base of the plant to protect it during winter months.
Red Star™ St. John's Wort Spacing
Red Star™Shrubs can be grown as a single plant or in groups. They should be spaced from 2 to 3 feet apart at the center when planting. They are a beautiful indoor, or outdoor option, and grow well in pots and containers. Because they grow upright, they should be the thriller in your container combination.
Red Star™ St. John's Wort Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 6 to 9 (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 Shade to Full Sun (3+ Hours Direct Sun)
- Mature Height
- 3 Feet
- Mature Spread
- 3 Feet
- Growth Rate
- Moderate
- Growth Habit
- , Mounded
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Yellow
- Flower Description
- Bright Yellow
- Bloom Time
- Early to Mid-Summer
- 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
- , Herbaceous, Deciduous, Semi-Evergreen
- Seasonal Interest
- , Spring Flowering, 3 Season Interest, Summer Flowering
Garden Benefits
Plant Overview
- Common Name
- Red Star™ St. John's Wort
- Botanical Name
- HYPERICUM INODORUM 'RED STAR'
- 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
We stand behind our plants with industry-leading guarantees to give you peace of mind.
We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
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!