Light Needs
Mature Height
Mature Spread
Growing Zones
Long-lasting blooms are the hallmark of the Gemo St. John's Wort. The bold yellow flowers are on full display from July till September. The large blooms are offset by thin, sword-shaped foliage in a grey-green hue. This low-maintenance plant features a tightly branched, upright growth habit. The Gemo St. John's Wort has bountiful blooms, and this shrub will be covered entirely in flowers during the summer.
This beauty will shine in beds, borders, mass plantings, or as a groundcover. At 2 to 3 feet tall, this plant can also be used as a low hedge. Butterflies are drawn to the vivid flowers, making this plant a lovely addition to a butterfly garden. St. John’s Wort is native to North America, so this plant requires some care and attention during the first year, but it will acclimate quickly and be very low-maintenance going forward. This plant grows as a perennial in USDA zones 4 through 9.
Gemo St. John's Wort Care
Plant in rich, neutral to acidic soil that is moist but well-drained. Gemo St. John's Wort does not like soggy conditions, so excellent drainage is necessary. This plant requires consistent deep watering for the first year but will not need as much water starting in the second growing season.
St. John's Wort naturally maintains a good shape, but you can trim it as needed. Support plenty of blooms by applying a slow-release fertilizer in the spring.
Gemo St. John's Wort Spacing
Space plants 2 to 3 feet apart to create a hedge or dense planting. The Gemo St. John's Wort will reach 2 to 3 feet tall and wide.
Gemo St. John's Wort Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 4 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 Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 2-3 Feet
- Mature Spread
- 2-3 Feet
- Growth Rate
- Moderate
- Growth Habit
- , Mounded, Spreading
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Yellow
- Flower Description
- Golden 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
- Gray, Green
- Foliage Type
- , Herbaceous, Deciduous, Semi-Evergreen
- Seasonal Interest
- , Summer Flowering, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Gemo St. John's Wort
- Botanical Name
- HYPERICUM KALM V ERECTUM 'GEMO'
- 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!