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Sale New Hydrangea macrophylla 'Oak Hill' (bigleaf hydrangea)

Hydrangea macrophylla 'Oak Hill' (bigleaf hydrangea)

$19.00
Next available Monday or Tuesday

Unavailable Available Only few left Out of Stock Pre-order
Shrub

If you're collecting mopheads, Oak Hill is another for your repertoire. It's part of that reliable group of Endless Summer-like remontant bigleaf hydrangeas.

Flowers vary from pastel to deep blue, purple, or pink - as always that depends on the pH and amount of aluminum available in the soil. The pictures show the flower color possibilities.

Remontant means Oak Hill will rebloom a second time later in the summer or, should a frost kill the first round of spring flowers, it will regrow and set flower buds again so you'll at least get that second round.

  • pastel blue or pink mohead
  • remontat - meaning it will rebloom to flower twice during long growing seasons
  • use as a substitute for any remontant mophead Hydrangea macrophylla
  • single specimen and accent use
  • large container use
  • grouping and massing - large swaths
  • flower and shrub borders
  • tolerant of salt spray so great for maritime climates
  • heat tolerant
  • cut flowers
  • remontant
  • long flowering period
Common Name
Oak Hill bigleaf hydrangea, bigleaf hydrangea, french hydrangea, mophead hydrangea, hydrangea, hortensia
Other Names
n/a
USDA Hardiness Zones
7a-9b
Size
medium
Class
flowering shrub, deciduous
Shape
round
Height
5-6'
Width
5-6'
Growth Rate
average
Flower Color
pink, blue
Showy Flower?
yes
Flower Season
spring, fall
Leaf Colors
  • Spring: medium green
  • Summer: medium green
Fall Leaf Color Quality
n/a
Native to USA?
no
Native To
Japan
Soil Moisture Requirements
moist-but-draining, no standing water
Soil pH Requirements
acid, neutral, alkaline
Light Requirements
sun, part shade, shade
To Make It Thrive
Give Oak Hill rich soil plus consistent moisture in a soil that drains. It may require extra watering, but avoid standing water. Grow it in full shade or afternoon shade in the deep south (zones 8 and 9), not only for the foliage, but so the flowers don't get sun scald. Full sun is okay farther north. For flowering in cold climates, situate it in a warm sheltered location. During the ups and downs of spring temps here in Zone 8a - we cover to protect flower buds.
Plant Patent
n/a
The flower color is not as you described, it's paler.
Yes, I've come to the conclusion that Hydrangeas don't like to have their flower color profiled and clinically categorized like we humans try to do to everyone and everything. Please keep in mind that flower color varies widly and wildly depending on soil pH and the amount of aluminum actually in your soil, the amount of time aluminum has been availalbe to the plant (did you add Al only last month?), the unique propensity of how each cultivar reacts to Al, and if the flower heads get a touch of sunshine as they age.

The flower color is not as you described, it seems darker to me.
Same issues as when it's paler; say after me, "a-lum-i-num-a-vail-a-bil-i-ty plus time plus cultivar plus a touch of sunshine."

This is science for sure, but also a whole lot of art. Enjoy the outcome Mother Nature deals!

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