This map was created by the U.S. Department of Agriculture (USDA) Agricultural Research Service (ARS) who has recently (2012) completed an extensive updating of U.S. Hardiness Zones based upon data from 5,000 National Climatic Data Center cooperative stations across the continental United States.
The USDA Hardiness Zone Map is a map with regions defined by a 10 degree Fahrenheit difference in the average annual minimum temperature. This map divides North America into 11 separate zones. The higher the zone number, the warmer the area.
Information from the zone map helps gardeners to compare their garden climates and determine what plants will grow in their area. Keep in mind, this map only shows average annual minimum temperatures and doesn’t take into consideration important factors like soil types, rainfall, daytime temperatures, day length, wind, humidity and heat.
Those factors are very important and play a key role in healthy palm growth and development. Knowing your hardiness zone is just not enough. A good example would be Portland, OR and Austin, TX. Even though they are both located in the Zone 8, their climates are dramatically different.
Palm Trees by State
Find out what palm trees can grow in your state:
Applying zone references
In the palm profile you might have seen reference to zone or range of zones. If a palm is hardy to zone 7, that means it can withstand lowest temperatures of that zone. If there is a range of zones like 7-10, that means it can grow only in those zones and will not tolerate colder or warmer temperatures.
If you live in a microclimate, that is an area with slightly different climate from a general climate of a region, then you might be able to grow more/less palms in your garden. Even within a city, a street, or a spot protected by a warm wall in your own garden, there may be microclimates that affect how plants grow.
Here is a list of zones with avg. annual low temperatures:
- Zone 1: below -50 F (below -46 C)
- Zone 2: -50 to -40 F (-46 to -40 C)
- Zone 3: -40 to -30 F (-40 to -34 C)
- Zone 4: -30 to -20 F (-34 to -29 C)
- Zone 5: -20 to -10 F (-29 to -23 C)
- Zone 6: -10 to 0 F (-23 to -18 C)
- Zone 7: 0 to 10 F (-18 to -12 C)
- Zone 8: 10 to 20 F (-12 to -7 C)
- Zone 9: 20 to 30 F (-7 to -1 C)
- Zone 10: 30 to 40 F (-1 to 4 C)
- Zone 11: above 40 F (above 4 C)
- How to Save Cold Damaged Palm Tree
- Top 10 Cold Hardy Palms
- Importance of Microclimate When Choosing Cold Hardy Palms
- Top 5 Factors Affecting Cold Hardy Palm Tree Growth
6 thoughts on “Palm Tree Cold Hardiness Zone Map”
Thank you for this great information. We moved from central Florida to north central Florida. Our cardboard palm has gotten way to big to leave on the patio near the pool. We have had this plant for over 15 years. It’s time to put it in the dirt. I was concerned about the colder winters here 7 miles south of the Georgia border. Now we know how to take care of the “not palm” during cold snaps he is going outside, in the ground, in a wind protected area. And I’ll be using Christmas lights to keep him nice and toasty warm. Thank you Susan.
I live in joplin since1994 I have grown needle palms 9′ x 6′
Saban minor 7′
Tracy nana 2′
All 3 in the open , to grace driveways and on the east and south side.
I call the sabals on the west side with no protection the “ice palms”
What would your recommendation be for a thin, smooth trunked palm that would be tolerant of Zone 8 in Austin, TX?
Hi Susan, my name is Gary. My question is what type of grow light to use for a Queen Palm that I had to bring indoors from the cold unpredictable winter weather here in the northeast? I like your informative site. I’m not a Twitter guy, l work 6pm-4:30am.
where can we find the list and photo’s of palm trees that fit in our space and grow a bit slow (so that they will continue to fit?
We are wanting to fit palm trees between a 4 wide and 5 ft wide (between a screened room and fence.
I have tested many cold hardy palms at my moms house for 5 years and I came into a conclusion. I noticed. Needles palms and windmills and most sabal palms do great in Indiana zone 6a. Everything else needs heavy protection. Since I have my own house am going to start working on the landscaping as well. I love Arizona Fan palm. I know they need heavy protection and I have seeds for it so am sure I could get them to work here as well. It’s all about trial and error.
Comments are closed.