San Marcos Growers LogoSan Marcos Growers
Home Products Purchase Gardens About Us Resources Contact Us
Nursery Closure
Search Utilities
Plant Database
Search Plant Name
Detail Search Avanced Search Go Button
Search by size, origins,
details, cultural needs
Website Search Search Website GO button
Search for any word
Site Map
Retail Locator
Plant Listings

PLANT TYPE
PLANT GEOGRAPHY
PLANT INDEX
ALL PLANT LIST
PLANT IMAGE INDEX
PLANT INTROS
SPECIALTY CROPS
NEW  2026 PLANTS

LIVE AVAILABILITY
  for JUNE


Natives at San Marcos Growers
Succulents at San Marcos Growers
 Weather Station

 
Products > Euphorbia x martinii 'Ascot Rainbow' PP 21,401
 
Euphorbia x martinii 'Ascot Rainbow' PP 21,401 - Ascot Rainbow Spurge

Note: This plant is no longer in stock. This is an archive page preserved for informational use.  
Image of Euphorbia x martinii 'Ascot Rainbow' PP 21,401
[2nd Image]
Habit and Cultural Information
Category: Perennial
Family: Euphorbiaceae (Spurges)
Origin: Garden Origin
Red/Purple Foliage: Yes
Yellow/Chartreuse Foliage: Yes
Variegated Foliage: Yes
Flower Color: Green Yellow
Bloomtime: Spring
Parentage: (E. characias x E. amygdaloides 'Rubra')
Height: 2-3 feet
Width: 1-2 feet
Exposure: Full Sun
Irrigation (H2O Info): Medium Water Needs
Winter Hardiness: < 0 °F
May be Poisonous  (More Info): Yes
Euphorbia x martinii 'Ascot Rainbow' PP 21,401 (Ascot Rainbow Spurge) - An compact moderately short lived perennial that grows 24 to 30 inches tall by 20 to 24 inches wide with very distinctly variegated narrow 2 inch long leaves that are displayed as neatly-layered rosettes rising up on the many stems from the base of the plant. The foliage and lower flower bracts are a rich blue-green color edged with yellow-cream that dramatically flushes red with new growth in spring and again as temperatures cool in the fall and then holding this color through winter in our southern California gardens. The flowers which rise up just above the foliage in mid to late spring and last into summer have clusters of the typical compound euphorbia flowers, called cyathiums, which have chartreuse and yellow bracts with dark red staminate flowers at the base of the cup-like involucres. Plant in full sun in a well-drained soils and give moderate to occasional irrigation. Hardy to at least -10°F - it is doing well in gardens in USDA Zone 6 and being tested in Zone 5. It is quite pest free and not attractive to deer or rabbits. Remove any reverted non-variegated stems and cut down to ground older stems in summer after new shoots have risen up 6 inches of more. Reliably lives for two to four years in most gardens and reportedly its performs best in the cooler Pacific northwest. It is useful as a container specimen, in the border or mixed with grasses as an accent in a meadow like setting. This plant is the result of the selection of a naturally occurring branch sport of an unpatented cultivar of Euphorbia.x.martinii (E. charachias x E. amygdaloides 'Rubra') that was discovered by David Glenn of Lambley Nursery in Ascot, Victoria Australia in 2005. It is similar to Euphorbia Helena's Blush but has a broader variegation and deeper red winter coloration. E. 'Ascot Rainbow' was winner of the Bronze Medal at the 2010 Plantarium and received its US Plant Patent on October 19, 2010. It is marketed in the US by PlantHaven. 

Information displayed on this page about Euphorbia x martinii 'Ascot Rainbow' PP 21,401 is based on our research conducted about this plant in our nursery library as well as from information provided by reliable online resources. We also include our own observations made about it as it has grown in the nursery gardens and other gardens visited, as well how the crops of this plant performed in the containers in our nursery field. We will also include comments received from others and welcome hearing from anyone who has information about this plant, particularly if it includes cultural information aiding others to better grow it.

 
San Marcos Growers closed for regular business at the end of 2025 as the property is being developed for affordable housing.
While our gates remain closed, we will open them by appointment so we can liquidate remaining plants, supplies and equipment. The plants remaining in the field are listed on our Live Inventory Page.
 
  [MORE INFO]