Crown Of Thorns Plant Froze: Can A Crown Of Thorns Survive A Freeze


By: Mary H. Dyer, Credentialed Garden Writer

Native to Madagascar, crown of thorns (Euphorbia milii) is a desert plant suitable for growing in the warmclimates of USDA plant hardiness zones 9b through 11. Can a crown of thornsplant survive a freeze? Read on to learn more about dealing with crown ofthorns cold damage.

Preventing a Frozen Crown of Thorns in Potted Plants

Basically, crown of thorns is treated like a cactus.Although it may be able to tolerate light frost, extended periods of cold below35 F. (2 C.) will result in a frost-bitten crown of thorns plant.

Unlike an in-ground plant, potted crown of thorns isparticularly susceptible to damage because the roots have little soil toprotect them. If your crown of thorns plant is in a container, bring it indoors in late summer or early fall.

Site the plant carefully if you have children or pets thatmight be harmed by the sharp thorns. A location on a patio or in a basement maybe a viable alternative. Also, keep in mind that milky sap from damages stemsor branches can an irritate the skin.

Preventing Frost-Bitten Crown of Thorns in Garden

Don’t feed your crown of thorns plant for at least threemonths before the first average frost date in your area. Fertilizer willtrigger tender new growth that is more susceptible to frost damage. Similarly,don’t prunethe crown of thorns plant after midsummer, as pruning can also stimulate newgrowth.

If frost is in the weather report, take action immediately to protect your crownof thorns plant. Water lightly at the base of the plant, then cover the shrubwith a sheet or frost blanket. Use stakes to keep the covering from touchingthe plant. Be sure to remove the covering in the morning if daytimetemperatures are warm.

Crown of Thorn Plant Froze

Can crown of thorns survive a freeze? If your crown ofthorns plant was nipped by frost, wait to trim damaged growth until you’re sureall danger of frost has passed in spring. Trimming earlier may place the plantat further danger of frost or colddamage.

Water frozen crown of thorns verylightly and don’t fertilize the plant until you’re well into spring. At thattime, you can safely resume normal water and feeding, removing any damagedgrowth.

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Snake Plant (Mother-in-Law's Tongue) Profile

Sansevieria trifasciata (also known as the Snake Plant or Mother-In-Law's Tongue) is one of the most popular and hardy species of houseplants. An architectural species, it features stiff leaves that range from six inches to eight feet tall, depending on the variety. Snake Plants usually have green banded leaves, while the variety commonly known as Mother-In-Law's Tongue typically features a yellow border.

Sansevieria trifasciata is a member of the Asparagacea family—a relative of garden asparagus. Sansevieria was first cultivated in China and kept as a treasured houseplant because it was believed the eight gods bestowed their virtues (long life, prosperity, intelligence, beauty, art, poetry, health, and strength) upon those who grew the snake plant. Sansevieria also is among several plants chosen by NASA for a study on how plants can be used for air purification and to combat "sick building syndrome." According to joint studies run by the Department of Horticulture at the University of Georgia and the Institute for Environmental Research at Yonsei University in Seoul, Korea, Sansevieria has a demonstrated ability to remove formaldehyde and benzene from the air.


SOLVED: Who is this pretty flowering bush?

I'd love to have some of these on my land. I recorded three photos of this plant at The Living Desert in Palm Desert CA (same growing zone as my own) near the quadruped living areas in the zoo portion of the botanical gardens/zoo there. Now I need to know who the plant is so that I can try to obtain some for my own land. Helps enormously to have a name to talk about when asking for a source :).

A productive guess, threegardeners :). I went to look at PlantFiles for "Crown of Thorns" (the link didn't work) and found several possibles. Euphorbia milii 'Brushfire' is way too short (maximum 18" vs the plant that I saw which was over 40" tall). OTOH Euphorbia milii 'Breon' at 4-6 feert is the right height but the shape of the flowers is entirely different. Tentatively though, it does look like the plant I'm trying to identify might be Euphorbia x lomi 'Valentine' and I have asked a person who says they have some whether my photo matches their plants.

I may have been a bit over enthusiastic about growing them here, however. Recalled after posting that the altitude in Palm Desert is *way* lower and they tend to have more natural rainfall (a lot more based on some visits I've made there) more functionally spaced through the year than here in the High Desert where all of the water we get from the sky tends to be in a couple of clumps of monsoons during late summer. Still need to verify the tentative identification though.

Euphorbias are pretty drought tolerant so as long as you're OK providing some supplemental water here and there I don't think that'll be a problem. I would worry about the hardiness though if it's E. milii--I have some of those and they don't make it through the winter unless I put them in the greenhouse.

Thanks for the comments, ecrane3. It raises two issues that hadn't occurred to me when I read my old photo note "I want some of these for my land when I get some (land)". One is the wind hereabouts. Ferocious sand storms 40 mph sustained with 60 mph gusts. The photographed plant was in a well protected area where even a tornado would have been unlikely to get at it. It was almost completely surrounded by taller sturdy growths and human structures.

Then too there are the indications of frostbite on my nascent Cactus Row from the trivial few days we've had below (not very much below) 32 degrees Fahrenheit. I'm not at all confident that those less than year old store bought originally cactii are going to still be alive by the time Spring arrives, even if we don't have any more nights below freezing. Before the light freeze hit they were looking very healthy and two of them seemed to be adding height. Now they look sick (frost bitten). I had been more worried about my Opuntia basilaris because it is in a mere above ground plastic pot while the others are in the ground. But after a few days of looking peaked, my Basil is looking entirely normal. The others, in the ground, aren't looking at all healthy. Although I am thinking about building a greenhouse long term for germination purposes, the notion of doing everything in planters or pots so that they can be moved into a greenhouse and back out again (my Little House itself is out of the question even for temporary plant residential purposes) just doesn't appeal to me.

All the more reason for me to want to know with some assurance who the pretty flowering bush *really* is so that I can study its record elsewhere and gauge how well it might do under the real world conditions extant on my land in the Mojave.

Do you have a copy of the Sunset Western Garden Book? It's really the "bible" of gardening in this part of the country. Figure out what Sunset zone you're in, and then look up any plants you're interested in before you buy them. The USDA zones are not very useful out here, but I've rarely had bad experiences with plants that Sunset said should do well in my Sunset zone.

As far as this plant, it is definitely a Euphorbia, and the only one I can think of that matches is E. milii. don't know which cultivar it is, but the cultivars aren't likely to vary significantly from each other in hardiness so I think any of them will be a bit questionable over the winter. You might consider something like E. griffithii instead--the flowers aren't quite as showy, but it's still really pretty and it's much hardier. http://davesgarden.com/guides/pf/adv_search.php?searcher%5Bcommon%5D=&searcher%5Bfamily%5D=&searcher%5Bgenus%5D=euphorbia&searcher%5Bspecies%5D=griffithii&searcher%5Bcultivar%5D=&searcher%5Bhybridizer%5D=&searcher%5Bgrex%5D=&search_prefs%5Bblank_cultivar%5D=&search_prefs%5Bsort_by%5D=rating&images_prefs=with&Search=Search

it is "EUPHORBIA MILII", there have many variety of flowers that it bloomed, here is the link:
http://www.blankees.com/house/plants/crown.htm
Common names :
Crown-of-thorns
Christ's Crown
The Christ's Thorn

Botanical name :
Euphorbia milii

Poisonous component
5-deoxyingenol

Having looked at E.milli I am certain the plant is not that suggestion. Having received NO response to my January 13 inquiry to the person who claimed to have some for sale or trade, complete with a copy of my photo of the plant that I was trying to match, I am unable to conclude that the plant in question is or is not Euphorbia x lomi 'Valentine'. Maybe it is. Maybe it isn't. Either way there are questions as to whether it would grow successfully in my area where both serious winds and occasional Winter frostbite are issues. If I can't grow it here nor obtain any from somebody who claimed to have some (nor even a positive ID that we're talking about the same plant when using the nomenclature), I eventually lose interest in it.

looks like pachypodium to me :(

But the flowers aren't right huh?

It does look like E. millii

If it is 'Valentine', I think it would have trouble with your winters so if you are able to track it down I think you'd have to grow it in a pot and bring it in for the winter.

As far as the person who didn't respond--if it's the person who shows it as available in their tradelist they posted it back in 2007 so there's no guarantee they are even still on DG. Some people drift away from DG over time and wouldn't necessarily think to clean out their tradelist before they stop hanging out here.


Watch the video: Euphorbia Milii from Seeds


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