If you like the tree it's worth a try. They can take plenty of cold if the source is Utah or Nevada; but even there they don't do well if the planting site is moist. So I expect your rain and snow will do them in....but why not try?

Looks like arbor day is just basing the suitability of the tree based on USDA hardiness zones.

The USDA zone system is not a measure of suitability. At best it is an indication of whether or not a plant can make it through a typical winter where you live. And it isn't even good for that. (I used to be confused by that too)

The sunset system purports to be a more accurate indicator of ultimate suitability - I have the national garden book and don't think highly of it.

Don't mean to rain on your parade. It might work out great. A better indicator would be a plant surviving somewhere in cultivation in a climate that resembles yours. Does an arboretum have one etc.

If you can plant it on a spot with really good drainage (such as a huge pile of sand and gravel), then I'd say the chances of success aren't too bad.

Resin

Native New Mexican here who went to grad. school in Michigan, and is familiar with both climates.

Yes, it should survive given that it has extremely good drainage and a very sunny spot. The latter point is important. Moisture rather than temperature is your enemy. With Michigans's rainfall they should survive with no supplemental water. Never water these once they are established. People here in ABQ., NM almost never water our 2 leaf pinons (8 to 10 inch natural rainfall a year). Heat, sun, drainage, and not much water is what it will need in MI to survive. Good luck. FYI - Pinon is the the preferred spelling here in NM.

"FYI - Pinon is the the preferred spelling here in NM" - really Pinon, and not Piñon? Do New Mexicans pronounce it without the 'y' sound too?

Resin

Hi all, can you see in my dwarf conifers garden maybe 10 years old Pinus monophylla. Czech republic - Europe, zone 5-6, sometimes - 30 degrees of Celsius, not so well drained soil, clay, acidic. This year is very hot, no so much rain, but normal in my place is very rainy weather......

Here is a link that might be useful: Dwarf conifers garden

Resin wrote - "FYI - Pinon is the the preferred spelling here in NM" - really Pinon, and not Piñon? Do New Mexicans pronounce it without the 'y' sound too?

You are correct. I didn't know how to do the tilda thing.

Jan, that monophylla is going to be a giant among your dwarfs. Its growth is as normal as in its native range, even faster than most.

"You are correct. I didn't know how to do the tilda thing"

I think that's why most people put the 'y' in, because they don't know how to do it either ;-)

Hold down the Alt key, and type 0241 on the num keypad (right hand end of the keyboard, that gives you ñ. Same, with 0209 gives cap Ã.

Of growing Pinus monophylla in Britain, hardly anyone does, but there's one in Cambridge Botanical Gardens 11m tall.

Resin

For growers of P. monophylla, here is an interesting tidbit. One of my Utah research areas when I was working with this species back in the dark ages was a steep south-facing ridge descending to a narrow flood plain of a creek that ran year-round. The trees on the steep rocky slope were typical singleleaf -- short, broad, limbs to the ground, densely bushy. But there were some on the flood plain growing beneath a canopy of quaking aspen and narrowleaf cottonwood. And these were arrow-straight with tiered branching and relatively long annual growths, as you'd expect from most white pine saplings. So DNA ain't everything.

Pinetree30, some of my Pinus monophylla was derived from witch´s brooms. No giants, I mean.
Jan wbgarden

Here is a link that might be useful: Pinus monophylla witch´s brooms.