http://gardenbreizh.org/photos/henry5

a part of my garden

more pics http://s993.photobucket.com/albums/af51/1972henry/

Hi Henry,

Nice pictures of your garden.

I don't know how many yuccas are unprotected.

I've found some Yucca postings from PN members in Zone 5.
You'll enjoy looking at the pictures on these 5 or 6 pages.

http://palmsnorth.com/forum/viewtopic.php?t=990&highlight=yucca

And this recent PN posting ranks hardiness of yuccas:
http://www.palmsnorth.com/forum/viewtopic.php?t=2440

Avec plaisir.
Barb

With protection,what ever you want!
Some Yuccas are not hardy below 0(F)like Y.aloifolia
It's best to keep cactus/yuccas dry starting Oct 1 and not water again until warmer weather in spring.
That site is the Growing palms in Colorado Springs USDA 5b

I think a few of those Yuccas need bigger pots 😯

Awesome pics Hernry5 8)

Henry,
I'm in zone 4b/5a (USDA) or zone 6a (Canadian) near Kingston, Ontario. If you look at our lows you'll see we hit around -27C last winter (-29 at my place) which compares well with downtown Montreal. Don't forget that the Canadian zone is usually 1 full zone 'warmer' then the zones quoted most often for plants (i.e. Montreal downtown is USDA zone 5a long term, but is zone 5b or 6a Canadian)... USDA zone is the long term (I use 30 year) average winter minimum for a given area. I've made a map that includes Montreal, if you're interested.

Anyway. I am able to grow the following Yucca without protection beyond the snow and fast draining soil:

Yucca glauca- Bullet porrf and can form a short trunk.
Yucca filamentosa (and cultivars)- Can get leaf burn in extreme years.
Yucca elata- Hardiest of the trunkers.
Yucca neomexicana- Hardiest of the Southwestern non-trunkers.
Yucca harrimaniae- Can be damaged in cold/wet years
Yucca baccata- Only selected forms. Not tolerant of cold/wet.
Yucca arkansana- Only 1 year in ground. Seems hardy.
Yucca recurvfolia- Usually top-kills. Hope that it will be hardier with age. Would love to cross it with Y. glauca to make hardier.
Yucca recurvfolia x filata (2 plants left)- Very hardy and quick growing. I hope they form trunks.
Yucca kanabensis (angustissima ssp. kanabensis)- Top killed it's first winter but has come back. Probably not long-term hardy.

Here is the S. Ontario/Quebec zone map for reference. Based on long-term data according to the USDA formula. If I had to change it, I'd probably reduce the Zone 6b in Southwestern Ontario, reduce the 5a just south of the Bruce Pennisula, and reduce the 5a around Montreal.

<img src=" " alt="ontzone1">

amazing yuccas. I lost my rostrata and aliofolia last winter but the rest of my yuccas survived. I have numerous recurvs, one elata, numerous non trunking yuccas and one glorisosa

Thanks all , i appreciate every comment and subjection.

Hi paul one more question i just want to known if u are able to suggest a place in south ontario to find some exotic hardy

ex. ( yucca rostrata , elata, cactus , palms , gunnera and more)

thank merci for every thing

Henry

Hi Barb nice pics , i'm happy to read you and i appreciate your gentle answer .

Henry

Aaron i don't know if my pics are awesome but if u like it i'm delighted.

merci a lot

henry

Thanks all , i appreciate every comment and subjection.

Hi paul one more question i just want to known if u are able to suggest a place in south ontario to find some exotic hardy

ex. ( yucca rostrata , elata, cactus , palms , gunnera and more)

thank merci for every thing

Henry

Henry,
Finding exotic Yucca species is quite difficult. Come spring, however, the following places 'might' have some Yucca in stock.
Cole's Florists- Grimsby, Ontario.
Rice Road Greenhouses- Throlod, Ontario.

Otherwise, get some seed and hope for the best!

Paul a big merci , rice road greenhouse and cole's loocking good i'm very excited for next spring i will be there for sure ,

anyway i love the niagara area and it's always a pleasure to visit this part of Ontario.

thanks again

Henry

Paul, nice work on that zone map.

Come to BC and edit ours please.

😉

Paul, nice work on that zone map.

Come to BC and edit ours please.

😉

Barb, There are far too many elevation changes in B.C. to produce an accurate zone map. You can easily determine the USDA zone for an area with a local ariport or weather station though... I'm sure that's what you've done to get your zone 5 classification!

Perhaps if I move to B.C. I'll make a zone map, but, for now, I'm going to leave that alone!

We'd welcome another Ontarian in B.C., especially if you bring your yuccas 😆

Airports are always located in flat bottomland, which are frost hollows.
Reported lows are usually way off the mark.
I'm glad personal weather stations are available so we can keep our own site specific records.

Elevation, as you suggest, is key.
And winter winds.

Barb