Blue hydrangea

Focal flower · Hydrangeaceae

Hydrangea

Hydrangea macrophylla

Also known as Hortensia and Bigleaf hydrangea

Big, cloud-like heads traditionally read as heartfelt gratitude, with mixed older meanings.

Colour: Blue

Often read as understanding, and in some traditions, apology.

Toxic to cats and dogs. Read the pet-safety note

Peak season
Jun–Sep
Vase life
4–8 days
Birth month
—
Colours
5

What the hydrangea means

In Japan a popular legend tells of an emperor who gave hydrangeas to the family of a woman he had neglected, and the flower is often read there as heartfelt apology or gratitude. Victorian flower dictionaries were less warm, sometimes linking it to boastfulness or heartlessness, perhaps because the shrub makes showy flowers but little seed. In modern Western use it is more often given for gratitude and understanding, and it is the traditional flower for a fourth wedding anniversary. As with all flower meanings, the reading depends on where and when you ask.

Flower meanings come mostly from Victorian floriography, and they vary between books, eras, and cultures.

Often sent for

  • Thank you
  • Mother's Day
  • Anniversary
  • Sympathy

By colour

  • Blue Often read as understanding, and in some traditions, apology.
  • Pink Often given for heartfelt emotion.
  • White Associated with grace and abundance.
  • Purple Sometimes linked to a wish to understand someone more deeply.
  • Antique green Associated with renewal in modern florist use.

Keeping it fresh

Summer to early fall from gardens; greenhouse and imported stems most of the year.

  1. 1 Hydrangeas can drink through their petals; submerge a wilted head in cool water for 30 to 60 minutes to revive it.
  2. 2 Recut stems at a sharp angle; some florists also split the base to help water uptake.
  3. 3 Some florists dip fresh stem ends in alum powder to reduce the sap that can block water uptake.
  4. 4 Keep the water deep and fresh, and mist the heads in dry rooms.

Pet safety

  • cats Toxic
  • dogs Toxic
  • horses Toxic

ASPCA lists hydrangea as toxic (cyanogenic glycoside): vomiting, depression, and diarrhea. Serious cyanide poisoning is rare.

Source: ASPCA toxic and non-toxic plants. If a pet eats any plant, call your vet or ASPCA Animal Poison Control at (888) 426-4435.

Did you know

Bigleaf hydrangea color depends on soil: acidic soil lets the plant take up aluminum and bloom blue, while alkaline soil keeps it pink.

Make your own hydrangea bouquet

Pick a vase, add a card, and share the link — no delivery van, no wilting.

Open Flower Studio