Light Needs
Mature Height
Mature Spread
Growing Zones
Sweet WIlliam is an expected plant in the spring cottage Garden. The sweet smell of the blooms mixed with the greenness of spring is not ever forgotten. Red Barbarini™ is a Dianthus that produces even more blooms than older varieties. The vigorous, but compact, growth makes this Sweet William a natural for use as edging a garden bed or planting in containers as part of a mixed seasonal display.
The dramatically red velvety blooms offset the lush green foliage. Sweet William attracts the early native bees and hummingbirds by the dozens. Deer and rabbits are repelled by the strong scent. Red Barbarini™ makes a great cut flower and a sweet addition to a small posey bunch.
Red Barbarini Dianthus Care
The soil pH is not important to dianthus. Acid, neutral or alkaline all work fine. Watering should be regular. Sweet William likes moist, well drained soil. Full sun to part shade is the ideal location to keep the blooms going.
Maintenance is very minimal. Fertilizing should be done early in the spring as the new growth emerges. A slow release, well balanced fertilizer supports both foliage and blooms. When the blooms are finished early in the summer, the whole plant can be cut back to 6 inches tall and mulch well.
Red Barbarini Dianthus Spacing
Red Barbarini Sweet William is a very low grower, but fills in a space wonderfully, Height of 4-8 inches and a width of 8-12 inches. Spacing of these plants when used as an edger should be at 10 inches on center. If planted into a container, they can be placed much closer at 6 inches on center. Dianthus is a quick spreader and does well with dividing and replanting every 2-3 years.
Red Barbarini™ Dianthus Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 4 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
- Full Sun (6+ Hours Direct Sun)
- Mature Height
- 6-11 Inches
- Mature Spread
- 6-18 Inches
- Growth Habit
- , Mounded
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Red
- Flower Description
- Deep Red
- Bloom Time
- Spring to Summer
- Foliage Color
- , Green
- Foliage Description
- Deep Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Spring Flowering, Summer Flowering
Garden Benefits
Plant Overview
- Common Name
- Red Barbarini™ Dianthus
- Botanical Name
- DIANTHUS 'BARBARINI RED'
- Plant Type
- Perennial
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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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!