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chrisltropical
06-03-2007, 11:40 PM
Anyone know about these 8 species of tree ferns from Sikkim, India?

http://www.ourhimalayas.com/sikkim/index.htm

Are they real tree ferns or are they ferns that grow in trees?

My logic. If Musa sikkimensis comes from Sikkim and is cold hardy, what about the "tree ferns"? Hmmmm....

the flying dutchman
06-04-2007, 06:38 AM
From what I know the best Fern and most cold hardy is Dicksonia Antartica
from Tasmania and New-Zealand.
It is in many gardens here in Holland outside. It is a real Fern.

Ron

chrisltropical
06-04-2007, 12:21 PM
Thanks. Most plants from Tasmania and New Zealand (including Dicksonia Antartica) can't live through a zone 6 winter. That's why the potential of other cold hardy "tree ferns" from Sikkim interests me. I believe Holland is a zone 8, correct?

the flying dutchman
06-04-2007, 12:31 PM
Correct

chrisltropical
04-15-2008, 10:41 PM
Cyathea spinulosa?

Why isn't it more common? Is it hard to grow?

Since Cyathea spinulosa is native to Mt.Emei, Sichuan China, it might be even more cold hardy than Dicksonia Antartica....

Ferns (http://www.asianflora.com/Pterydophytes/Cyathea-spinulosa.htm)

Cyathea spinulosa (http://www.angelfire.com/bc/eucalyptus/treeferns/spinulosa.html)

Over wintering anything native to Tasmania and New Zealand in my yard is not likely. However, I do know many plants from Sichuan, China can be grown here.

Cazieman
04-17-2008, 12:39 AM
in seattle we have the Austrailian or (Rough) Tree Fern - Cyathea australis
it is planted around the city, i guess you can take a tall one and hack it in to pieces and it will grow new fronds making new trees, and they dont have to be planted for quite some time also(just kept moist). now thats flexable land scaping! they look really nice once the fronds have filled out and lay more horizontal.

chrisltropical
04-18-2008, 09:39 PM
Wish I could grow Cyathea australis outdoors here!

What about Diplazium doederleinii? Anyone know anything about it? Cold hardiness? Where it is sold?

From the photo found in the link below it looks like a large fern. Maybe a Tree Fern? Hard to tell from the photo....

Ferns (http://www.asianflora.com/Pterydophytes/Diplazium-doederleinii.htm)

Snarkie
02-23-2015, 08:04 PM
Sorry to dredge this thread back up after all of these years, but they stay in the archives for a reason.

I found this thread online during a search for cold-hardy tree ferns. I looked into Dickonia antarctica and discovered it will defoliate at 27F, but will withstand temps to 11F and occasional dips to 8F.

So my question is this:
Is D. antarctica THE most cold-hardy tree fern on this planet, or is there one that anyone knows of that will take colder temps than 10F?