Wallichia densiflora

[DoomsDave]

Three plants, all in five gallon pots, under ficus trees, nearby exposed area saw three days of night-long 24.8 F, and another day of 28.7 F, no damage so far.

Canopy counts . . . .

[Jim in Los Altos]

Three plants in the ground four years as understory palms. 26.5F low. No damage to speak of.

[PalmGuyWC]

Light overhead protection in Dec at23/24F, no damage.  Protected in Jan with a 100 W light bulb and a sheet thrown over.  No damage.

Dick

[PalmGuyWC]

A late report:  My W. densiflora came through the winter with absolutely no damage, and it's already showing signs of growth. This one grows at a snail's pace for me, but may be the most cold hardy of the Wallichia's.......with some overhead protection. Mine gets about 50% shade in the summer.

Dick

[Mauna Kea Cloudforest]

Here's a report on the Dec 2013 freeze. W. densiflora, came out of Monterey Bay nursery greenhouse and planted in July, no overhead protection whatsoever. New frond produced during the Summer is intact. Fronds from the greenhouse fried to a crisp after the first night of the freeze, damage visible already while still frozen.

Strong radiational freeze, my garden is on a hillside, lower garden got nailed pretty hard by cold drainage and wind protection. 5 nights below freezing for 9 hours or less per night, worst night was 26.6F, see data and graphs below for details. This plant is planted at the bottom of my property where it's the coldest.

Not a trace of damage. Note that a potted parajubaea sunkha 2 feet away got significant frost damage (probably not hardened off.)

Dec 4/5: 57.4F high, below 32F at 11.17PM steady decline to 26.6F at 7:30AM with a dewpoint of 16F. above freezing 8:47AM

Dec 5/6: 57.4F high, below 32F at 11:30PM steady decline to 29.8F from 4:30AM to 7AM, above freezing 8:30AM

Dec 6/7: 55.9F high, 50F overnight with 1 inch of rain

Dec 7/8: 53.1F high, below 32F at 11:30PM, steady decline to 28.6F, above freezing by 8:45AM

Dec 8/9: 55.9F high, below 32F at 11:30PM, steady decline to 28.6F, above freezing by 5:30AM

Dec 9/10, 60.8F high, below 32F at 6:30AM, down to 30.9F above freezing by 8:00AM

[Phoenikakias]

Both my disticha survived the freeze/frost of doom in 2004.

Edited December 18, 2013 by Phoenikakias

[Mauna Kea Cloudforest]

Ooops I cut and pasted the temp readings and copied the "not a trace of damage', that was incorrect.