Diamond Mountain Euphorbia (Euphorbia 'Diamond Mountain')
yew-FOR-bee-ah 'Diamond Mountain'

Annual (usually grown as an annual near you) Mounded, Spreading in the Euphorbiaceae Family
The big, bold member of the Diamond series - a vigorous, mounded spurge covered in airy white blooms from spring to frost, twice the size of Diamond Frost.

Diamond Mountain is the oversized member of Proven Winners' Diamond series of annual Euphorbia, bred to be twice the size of smaller siblings like Diamond Frost and Diamond Snow. Its vigorous, freely-branching stems form a 2 to 3 foot mound covered in a continuous airy cloud of tiny white flowers from spring until frost, with no deadheading needed. It tolerates heat and drought well once established and, unusually for the genus, performs surprisingly well even in shadier spots. Like all Euphorbia, its milky sap is an irritant to skin and eyes, so handle with gloves.

Pros

  • Loads of white clouds of flowers from spring to frost
  • Vigorous, self-sufficient, and heat and drought tolerant
  • No deadheading or regular fertilizing needed
  • Deer and rabbit resistant

Cons

  • Needs the extra room its larger size requires - not a tight, compact filler like its smaller Diamond-series siblings
  • Sap can be irritating to skin and eyes
  • Patent/PBR applications are pending, not yet granted
Highlights Award Winner Continuous Bloom or Rebloomer Long Blooming Heat Tolerant Deadheading Not Necessary Drought Tolerant
 

Plant Data

Mature Size 24 - 36 inches tall. 24 - 36 inches wide.
Growth Rate Fast
Sun Exposure Partial Sun - Full Sun
Moisture Tolerance Medium
Tags Annual, Annual in Chicago, Attracts Butterflies, Attracts Pollinators, Attracts Wildlife, Colorful Foliage, Container, Deer Resistant, Drought Tolerant, Edging, Filler, Full Sun, Good for Accents, Good for Borders, Good for Butterfly Garden, Good for Mass Planting, Grown For Attractive Foliage, Low Maintenance, Medium, Normal Soil, Partial Sun, Potentially Toxic, Prairie Garden, Rabbit Resistant, Shade Tolerant, Showy Flowers, Small Flowers, Tolerant of Moist Soil, Tolerant of Sandy Soil, Well-Drained Soil
Bloom Period Spring To Frost
Flower Color White
Foliage Color Green
 

Awards
 

In The News

Photos of This with...

Diamond Mountain Euphorbia, Snowstorm Giant Snowflake, Angelface Steel Blue Summer Snapdragon, Superbena Raspberry Verbena, Superbena Whiteout Verbena, Silver Bullet Wormwood, Superbells Evening Star Calibrachoa, Superbells Grape Punch Calibrachoa, Vermillionaire Firecracker Plant, Sweet Caroline Bewitched Green With Envy Sweet Potato, Sweet Caroline Jet Black Sweet Potato, Laguna Sky Blue Lobelia, Gold Dust Mecardonia, Supertunia Bordeaux Petunia, Supertunia Giant Pink Petunia, Supertunia Vista Bubblegum Petunia, Supertunia Vista Paradise Petunia, Supertunia Vista Snowdrift Petunia, Tiger Eyes Staghorn Sumac, Rockin' Blue Suede Shoes Salvia, Playin' the Blues Salvia, Superbena Cherryburst Verbena, Superbena Red Verbena, Superbena Royale Plum Wine Verbena, Superbena Scarlet Star Verbena, Meteor Shower Verbena,
 
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Pricing and Availability History

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Past Availability
2025 : 02/05 - 05/17
2024 : 02/08 - 05/18
2023 : 03/02 - 05/21

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Field-Grown vs. Greenhouse-Grown Plants

Plants which are well-adapted to our local climate are most often field-grown (outside). Field-grown plants are generally cheaper and have the advantage of already somewhat acclimated to our cold winters, but that means they’re not artificially far along in the spring and tend to bloom at the normal time in our area.

Spring annuals and tender perennials are typically grown in Greenhouses so they can be ready and luxurious exactly when customers want them. Some perennials are also “forced” into early bloom in greenhouses. In May, there can be a very big difference between field-grown and greenhouse-grown plants of the same type. The latter typically look good right away (so they’re a great choice where that’s important), but we typically pay a premium for it.


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The cost of this recipe's ingredients will vary depending on the season and the sizes and varieties you select.


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No Pricing or Availability Right Now

We order from a rotating cast of the best nurseries in the Great Lakes region. It looks like we've offered this plant in the past, but the nurseries we're working with this week don't appear to have it in stock at the moment.

Our goal is to bring as many plants together under "one roof" as possible, so we'll try hard to make it available again in the future!