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Lawn & Garden

Bigleaf Hydrangea, Hydrangea macrophylla


Common Name: Endless Summer hydrangea, Nikko Blue

Type: shrub

Family: Hydrangeaceae

Zone: 6 to 9    Find Your Zone

Height: 3 to 6 feet

Width: 6 to 8 feet

Bloom Time: summer

Bloom Color: blue, pink, white, violet

Sun exposure: full sun to partial shade

Soil: fertile, well drained, acidic to neutral

Leaves: deciduous


Hydrangea macrophylla is best known for blooming off of old growth. Pruning is to be done immediately after blooming. Look for Endless Summer Hydrangea, as it is unique for its much longer bloom time, due to its ability to bloom off of new growth. Soil pH dictates bloom color. Soil pH of 5 to 5.5 will have it bloom blue and 6 to 6.5 will have it bloom pink.Take a look at our 11 Shade Loving Shrubs.


STEP 1: Digging the hole

  • Find a location that has suitable sun exposure for your particular type of plant.
  • Dig your hole an inch or two shallower than the rootball of the plant.
  • Dig the hole twice the diameter of the rootball.
  • Scuff up the sides of the hole with a shovel to help roots break through the native soil.

STEP 2: Putting plant in hole

  • When removing the plant from the pot, check to see if the roots were circling the pot.
  • If the plant is rootbound, gently break up the roots with your hands until loosened up.
  • Set plant level, in the center of the hole.
  • Make sure the top of the rootball is just above soil level.

STEP 3: Amending the soil and filling in the hole

  • Amend the soil with proper amendments for your soil type. 
  • Incorporate 50% native soil with 50% amendment soils like garden soil, composted manure or soil conditioner.
  • Make sure dirt clods are broken up or removed from hole along with rocks.
  • Fill the hole with soils to the soil level and pack down. Do not cover top of rootball with dirt.
  • Water in thoroughly to remove air pockets.

STEP 4: Mulching and fertilizing

  • Cover the planting site with at least 2 inches of the mulch of your choice (pinestraw, cupress mulch,etc.)
  • High Phosphorus root stimulator fertilizers like Quick Start from Miracle Gro are great to use at time of planting.

Find your closest local store

Other Related Plants:

Limelight hydrangea

Oakleaf hydrangea

Climbing Hydrangea

Types of Hydrangeas

Why Your Hydrangeas Aren't Blooming

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Posted 2015-06-11T15:01:41+0000  by Ingar_HD_ATL Ingar_HD_ATL