Light Needs
Mature Height
Mature Spread
Growing Zones
The Proven Winners ColorChoice® Cityline® Rio Hydrangea has unique blue and green blooms that will draw anyone’s attention. New and experienced gardeners will both love this shrub for the uniqueness of the flowers and how easy it is to care for.
This hydrangea is compact but has very large flowers that bloom from early to late summer. The flowers range from purple to blue, with greenish variegated centers that last all season long. This plant is great for a standout centerpiece in any garden!
The Rio Hydrangea is also both salt tolerant and mildew resistant.
Cityline Rio Hydrangea Care
This macrophylla hydrangea is best planted in well drained soil. The plant needs moisture, but prevent it from getting “wet feet”. It will perform best in a location with at least 6 hours of sunlight, but in an area that also gets afternoon shade to help protect against hot summer days.
Pruning the Cityline Rio Hydrangea is not necessary. This plant is small and compact already, so there is no benefit of doing so. Also, the bush grows flowers on old wood. Meaning if you prune the branches at the wrong time of year, you could be cutting off next season’s flowers before the buds have had a chance to shine.
These plants are great in containers. If you do plan on growing these in a garden planter, be sure and provide extra protection in winter, especially in colder climates like zones 5 and 6.
Change the color of the flowers to a more blue color by adding aluminum sulfate to the soil in early spring before growth starts to emerge.
Cityline Rio Hydrangea Spacing
These small bushes should be planted 2 to 3 feet apart, center on center. If you choose to plant into a landscaping border, you can plant 18 to 24 inches apart, center on center. Use the same spacing guidelines if planting more than 1 shrub in a pot.
Cityline® Rio Hydrangea Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 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 Habit
- , Mounded, Dwarf
- Water Needs
- Consistently Moist
Flowers & Foliage
- Flower Colors
- , Blue, Pink, Purple
- Flower Description
- Blue, Pink, Purple
- Bloom Time
- Summer
- Blooms On
-
Old 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
- Right after flowering
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Interest, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Cityline® Rio Hydrangea
- Botanical Name
- Hydrangea macrophylla 'Ragra'
- Brand
- Proven Winners
- Plant Type
- Mophead Hydrangea
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!