Light Needs
Mature Height
Mature Spread
Growing Zones
With its purple-pink blooms, HI™ Fire Hydrangea will certainly set your borders or containers ablaze. A mophead or macrophylla hydrangea, HI™ Fire produces large blooms, which turn from lime green to pink or purple depending on the soil’s pH. With its strong stems and branches, this hydrangea forms an upright, mounding habit of green foliage up to 5 feet high. With the right care, this hydrangea can rebloom all summer long.
Suitable for growing in zones 6 through 9, HI™ Fire Hydrangea is perfect for growing as a specimen in a border or container, or for forming a low and informal hedge. As a low-maintenance shrub, it is easy to care for and its blooms are perfect for using in the home, whether freshly cut or dried. With its strong framework, its large blooms are less likely to droop than other varieties.
HI™ Fire Hydrangea Care
For the showiest flowers, the HI™ Fire Hydrangea should be grown where it will receive full sun to partial shade. Tolerating most soils as well as clay, HI™ Fire Hydrangea thrives when it is grown in a fertile and free-draining growing medium. It requires consistently moist soil, so frequent watering is essential to prevent this shrub from wilting. An annual mulch of garden compost or leaf mold will help conserve moisture during the warmer months and suppress any weeds. If grown on poor soil, a balanced fertilizer can be applied in spring to provide some extra nutrients.
Pruning this hydrangea is best performed in early spring as the new buds begin to swell. Using a pair of clean and sharp pruners, simply remove the spent flower heads back to a healthy pair of buds. When grown in a container, this hydrangea will require more frequent watering compared to plants grown directly in the ground.
HI™ Fire Hydrangea Spacing
HI™ Fire Hydrangea can grow to an eventual 3-5 feet tall by 4-5 feet wide. If planting this hydrangea out as part of a group, plants can be spaced 4-5 feet apart depending on the desired effect when fully grown.
HI™ Fire Hydrangea 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 Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 3-5 Feet
- Mature Spread
- 6-7 Feet
- Growth Habit
- , Mounded, Upright
- Water Needs
- Consistently Moist
Flowers & Foliage
- Flower Colors
- , Pink, Red, White
- Flower Description
- White Changing To Pink-Red
- Bloom Time
- Mid-Summer to Fall
- 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
Garden Benefits
Plant Overview
- Common Name
- HI™ Fire Hydrangea
- Botanical Name
- Hydrangea mac. HI Fire
- 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!