Zone question

bloomorelse(Z4b NB Canada)November 27, 2004

If I am in Zone 4B, what USDA zone does that equal to. I often look at on-line nurseries from US and would like to be sure the plant I am interested in will survive in my area. Thanks.

Thank you for reporting this comment. Undo
glen3a(Winnipeg MB 3A)

The US maps and Canadian maps are a bit different but for the most part quite similar. The CDN one supposedly takes more into account than just the coldest winter temperatures.

I am including a link of the USDA hardiness map. The map extends into Southern parts of Canada. Maybe you can visually find your location on the map?

If not, you might be able to tell what your USDA zone is based on the lowest winter temperature in your location (on average). There is a chart provided. For example, if your lowest winter temperature (weÂre talking temperatures, not windchill) is normally -29 to -32 C (-25 to -20F), then the USDA chart says zone 4B.

In summary though, it's not always 100% clear. Some zone 4 stuff has been known to survive in zone 3, especially a sheltered spot.

Here is a link that might be useful: USDA zone ratings

    Bookmark   November 30, 2004 at 5:12PM
Thank you for reporting this comment. Undo
bloomorelse(Z4b NB Canada)

Thanks Glen. I was just never sure on US zone hardiness compared to ours. I often admire a plant from a posting and wonder if it is hardy in my zone.

    Bookmark   November 30, 2004 at 6:03PM
Thank you for reporting this comment. Undo
ninamarie(4Ont.)

I find it easier to learn the plants natural habitat. If you know a plant likes desert conditions, and the soil in your garden is naturally moist to wet, it's probably a poor candidate.
But if I want the plant, and I think I have the right conditions for it somewhere, then I don't let a zone or two get in my way. If I'm feeling really frisky, and the plant is not terribly expensive, or I raised it from seed, I'll often push by as much as three zones.
It's surprising what survives.
Why not join a local horticultural society and ask the members. I'll bet a goodly number zone push.
And why not try to order from Canadian nurseries.

    Bookmark   December 2, 2004 at 11:19AM
Thank you for reporting this comment. Undo
DianeKaryl(z5ONT)

Canadian gardening sources use the U.S. Dept of Agriculture information nowadays.
There really is no reason not to go by the U.S.D.A's zones.

    Bookmark   December 22, 2004 at 4:30PM
Sign Up to comment
More Discussions
help lilacs near garden
Hi, I am planning to do a lilac hedgerow north side...
Meuhey
Black walnut tree
Hi, I am having a blackwalnut tree cut down, and the...
joy4so
Chilling requirements for japanese maple.
I love the JM's I had a bloodgood. Planted it in the...
Sherwood Botsford
overwintering potted trees & seedlings
I have a lot of small volunteer trees from bad spots...
thelonerider1
Something killing my million bells!
They were flourishing and beautiful. Now there's some...
JJcanuck
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™