Light Needs
Mature Height
Mature Spread
Growing Zones
The Proven Winners ColorChoice® Cityline® Mars Hydrangea is a very small and compact shrub with very unique flowers. The blooms range from red or pink with lime green edges, to blue and purple with white edges on the pedals. The flower pedals have a variegated look to them. The color is determined by the soil pH. Blue and purple flowers come from acidic soils. Red and pink flowers grow in more alkaline soils. These shrubs perform very well by the ocean, and prefer moist conditions. The plant is also mildew resistant, which helps in rainy areas.
Cityline Mars Hydrangea Care
These bushes do best in well-drained soil. We recommend amending the soil with peat moss or compost. Applying mulch will help retain moisture as well as adding extra winter protection, which may be necessary in colder climates with harsh winter conditions. Pruning Cityline Mars Hydrangea is not necessary, but if you choose to do so, trim immediately after flowering. This shrub blooms on old wood, so pruning in fall or winter will reduce the amount of blooms for the following year. You should also provide extra protection during winter to help keep the flower buds safe from the cold. If you plant this shrub in a garden planter, be sure to either move the plant indoors over the winter, or plant in the ground in the fall. Fertilize in early spring, using slow release fertilizer designed specifically for woody plants, such as roses.
Cityline Mars Hydrangea Spacing
Plant these shrubs 2 to 4 feet apart, center on center. To create a landscape border, plant these a little closer together, around 18 to 24 inches apart, center on center. These do great in containers, but need to be planted in the ground in the fall.
Compare Cityline® Hydrangeas
Compare flower color in alkaline and acidic soil, mature size, and the traits that distinguish each Cityline® Hydrangea.
| Variety | Alkaline Soil Color | Acidic Soil Color | Mature Size | Why Choose It |
|---|---|---|---|---|
| Rich red-pink | Red with purplish centers | 12–24" H × 12–36" W | Reddest bigleaf hydrangea; stays red in almost any soil | |
| Purple-pink | Light blue | 12–36" H × 12–36" W | Thick stems hold big mopheads upright | |
| Fuchsia to rich mauve | Mid-blue | 12–36" H × 12–36" W | Very compact; flowers age to an attractive green | |
| Purple | Deep blue | 24–36" H × 24–36" W | Best blue in the series; early to bloom | |
| Pink & white | Blue & white | 12–36" H × 12–36" W | Unique white-edged, two-tone florets |
Cityline® Mars 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
- 1-3 Feet
- Mature Spread
- 1-3 Feet
- Growth Habit
- , Mounded, Dwarf
- Water Needs
- Consistently Moist
Flowers & Foliage
- Flower Colors
- , Blue, Pink
- Flower Description
- Blue, Pink
- 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
- Dark Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Interest, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Cityline® Mars Hydrangea
- Botanical Name
- Hydrangea macrophylla 'Ramars'
- 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!