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Sale Hydrangea macrophylla 'Mme. Emile Mouillère' (bigleaf hydrangea)

Hydrangea macrophylla 'Mme. Emile Mouillère' (bigleaf hydrangea)

Next available Monday or Tuesday

Unavailable Available Only few left Out of Stock Pre-order

This white mophead reminds me of when an owner looks like their dog; in this case it's how the serrations on the sterile floret sepals match the serrations on the leaves - they are both accentuated on Mme. Emile Mouillère - really ruffly and busy. I like it. It's a little fussy and old-fashioned looking.

There aren't too many white mopheads in circulation, and they all are truly different from each other. Once you learn this one, bingo, every time you see it (which won't be too often) you'll probably exclaim verbatim, "look, that's Madame Emile Mouillère white mophead hydrangea!" Or something very close to that mouthful.

She's free flowering, which is another way of saying Madame sure does flower a long time (without being truly remontant).

It was pointed out to us that the sterile floret centers ("eyes") turn blue in acid and pink in alkaline soils. In the picture, the flowers are just opening and the centers are green.

Similar to the eyes, flowers age a pale blue tint or a pale pink tint, depending on soil pH. We've included two pictures that show this lovely pink or blue tinting. In our experience, the white phase lasts several weeks, eventually tinting as described.

Our other white mophead is Queen of Pearls.

More will be ready late summer 2020. 🌱

Grower's Note: We grow Madame in RootMaker pots so we induce the best, well-branched, non-circling roots possible. These pots are expensive, so we take your plant out of the pot, then we clean and reuse the pot (recycling at its best). To ship your plants, we carefully wrap the roots in a compostable plastic bag, then put them in a paper bag; then they are boxed. This triple packaging holds together very tightly during shipment. Please have a pot on hand to shift them up into, but they will hold as-is in the packaging we send them for several days before planting (please water them!). The goal of this system is to have good roots and reduce trash. 

  • free flowering - meaning it will flower for a long period and produce new flowers, while not being truly remontant
  • 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
  • long flowering period
Common Name
Mme. Emil Mouillere bigleaf hydrangea, bigleaf hydrangea, french hydrangea, mophead hydrangea, hydrangea, hortensia
Other Names
'Sedgewick's White'
USDA Hardiness Zones
flowering shrub, deciduous
Growth Rate
Flower Color
Showy Flower?
Flower Season
Leaf Colors
  • Spring: medium green
  • Summer: medium green
  • Fall: red, orange
Fall Leaf Color Quality
Native to USA?
Native To
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 Mme. Emile Mouillere 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
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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