What area is the furthest north has a climate that supports Palm Trees? (averages, freezing)

[ColdCanadian]

Originally Posted by GraniteStater

I really don't think they could survive zone 5 unless you display pics for evidence. I live on the edge of zone 5/zone 4 and we get lows colder than -20F during a typical winter. It is not unusual to see lows colder than -30F as well. Windmill palms would not survive in central NH.

^^ I agree.

Toronto would be in USDA's zone 5a.
Most of the mildest parts of the "Golden Horseshoe" would be 5b.
The mildest parts of Ontario might barely be USDA zone 6a.
I've never seen anything that resembled a palm tree here. (outdoors that is)

A winter with "seasonal temps" would have a few mornings at at least -10 F. (-23 C)
Our mildest winter on record still went down to 6 F once. (-14 C)
In colder winters it's not unusual to see at least one in the -20's F. (into the low -30's C)

[puerco]

On the West coast the farthest north one can find the tall Phoenix (dates), and Washingtonias (CA. & Mex. fan palms) as well as queens, kings, pindos and others thriving is on the So. Oregon coast in the area of Brookings and Gold Beach. North of there windmill palms take over as the dominant palm all the way up into SE Alaska. Every year Portland, Seattle and Vancouver seem to get more and more windmills planted into their lush landscapes. Most of the PNW doesn't get hot enough for most of the sabals with the exception of Roseburg and Medford, OR.

[puerco]

Brookings is also the farthest north you'll find a zone 10 (30-40 degrees) on either of the coasts.

[city_data91]

Brookings has nice winters, temperature-wise. The only problem is all the rain/fog/clouds and the fact that summer isn't much warmer than winter.

[puerco]

Originally Posted by city_data91

Brookings has nice winters, temperature-wise. The only problem is all the rain/fog/clouds and the fact that summer isn't much warmer than winter.

You're right about the rain altho I've visited it many times in mid-winter and found mild, sunny days in the 60's. It's in the fog belt so August, September, and October are the best months there.

[Tennesseestorm]

Well, the Needle palm is supposed to survive -20° once established. Windmill around 0° once established. There are many more, but most are no lower than 0° trees.

I planted another Windmill last night....

[sandwalk]

Palms are planted in outdoor parks and gardens every Spring, and remain from about May through September----in Sandusky, Ohio (in Washington Park, downtown).

[Zachj7]

Southern extreme western Alaska on islands I bet palms can be grown. I see rows of palms in Vancouver Canada.

[musicloverhappy69]

plam trees can grow as far north as the tempearture on average does NOT drop below 32 degrees(freezing)in winter.that means vancouver,british columbia,canada on the west coast and virginia beach,virginia,u.s.on the east.both those cities drop to around freezing,but not(much)below,in febraury.

[Tennesseestorm]

It depends on the type of palms... they are all different. Some wont survive below 40°, while some of the hardiest ones (Needle palm) will survive as low as -20°.