How to Grow Hardy Palm Trees Outside in Zone 5,6, and 7

Updated on April 5, 2016

An unusually warm winter has revived my interest in northern tropical gardening. It is not news that overall, mean temperature gradients are increasing across the country. This may promote better results with semi-tropical gardening. It may come as a surprise to many that some gardeners experiment with palms and palm trees in their gardens in states such as New York, Ohio, and Illinois. In fact, palms and other semi-tropical plants grow with little or no protection with vigor in states such as Virginia despite cold winters, and gardeners that live in states with harsher winters just need to administer a little protection to cold hardy palms to keep them in the ground all year round.

Extensive protection of mature Montreal palms

Protecting Palms

  1. Plant palms if possible in the warmest micro-climate with a south exposure
  2. Wrap the leaves in burlap or similar landscape fabric
  3. Apply a copper-based fungicide during wet weather and in the early spring.
  4. Apply anti-desiccant to the leaves before severe cold spells
  5. Mulch the base and the crown of the plant a few inches

What to Expect (Realistically)

In my experience, the weather patterns that affect palms the most are wet, cold weather and, in my southern New York zone 6b location, about twice every winter we receive an ‘arctic blast’ with temperatures that dip into the single digits (°F) and don’t rise much higher for 24 hours. I’ve had plants that have done fine with temperatures in the range of 15-30° F only to succumb to these annual occurrences.

When plants survive these cold spells, they are typically defoliated completely (with my lenient protection), but they will produce leaves again in the spring if they have adequate growing conditions. Due to this, expect that the beautiful leaves on your newly planted palm will not be anywhere near as elegant the following year unless you use intensive protection. However, such an interesting garden specimen is worth it, in my opinion.

Methods for Optimum Success

Depending on the weather conditions your area experiences, semi-tropical plants may or may not need extensive protection, however protecting palms will provide the greatest chances of success, or preserve more plant tissue and possibly leaves if blessed with a mild winter. At minimum, palms should have a copper-based fungicide applied to the leaves, stem, and crown before and after wet conditions.

If the new growth of the palm ‘pulls’ out of the crown, the plant is in decline and will require a dousing with the fungicide in that area. The palm should also be treated with an anti-desiccant such as Wilt Pruf, which will help the plant hold water in freezing conditions. The key to aiding palms in the winter is to keep them as dry as possible (especially the crown, where damage can be fatal), and keep them desiccated. It would even be beneficial to water the plant with warm water after long periods of dry or freezing weather.

Protecting the palm with mulching can increase the temperature and prevent strong wind chills from affecting the leaves so severely. If your area is expected to have such prolonged low temperature drops (-5-15F), a make shift cage filled with dried leaves, straw, or other similar substrate is a good idea. The 'cage' will prevent the mulch from being blown away°. Surprisingly, snow acts as an insulator and is beneficial.

Cold hardy palms have had success reports all over the map, and some are very impressive sounding. This may be a decent guide to provide insight into a plant’s potential hardiness, but remember that what will really determine your plant’s success is its location near wind-barring structures, the duration of extremely cold temperatures, the amount of damaging ice (freezing rain) and the frequency of wet weather between periods of cold.

Click thumbnail to view full-size
Chinese Fan PalmMulching the base and crown of hardy palms (Pindo and Chinese fan palm)Chinese fan palm regrowth after winterMulching (the garden is located in an undeveloped area)
Chinese Fan Palm
Chinese Fan Palm | Source
Mulching the base and crown of hardy palms (Pindo and Chinese fan palm)
Mulching the base and crown of hardy palms (Pindo and Chinese fan palm) | Source
Chinese fan palm regrowth after winter
Chinese fan palm regrowth after winter | Source
Mulching (the garden is located in an undeveloped area)
Mulching (the garden is located in an undeveloped area) | Source
Needle palm seedling with winter damage, February
Needle palm seedling with winter damage, February | Source

The Hardiest of the Hardy Palm Selections

The Needle Palm

Without a doubt, the needle palm and its many developed cultivars is the best choice for the beginner northern palm enthusiast or even for gardeners just looking to add an unusual specimen to the landscape. These plants are hardy enough to not require protection and could possibly emerge from a winter with little damage as well. Their drawback is that they grow very slowly and won’t really achieve visual interest until they mature over the course of several years. This is why I highly recommend purchasing mature specimens that have at least an inch or 2 of trunk, even if they are relatively expensive. Older plants also have the advantage of being hardier. I would protect the plant for the first winter if making the investment for the best results. These plants can be found on specialty websites and Ebay.

Two newly planted windmill palms. See video for winter damage and survival.
Two newly planted windmill palms. See video for winter damage and survival. | Source

The Windmill Palm (trachycarpus fortunei)

Another popular choice, this palm and its cultivars (several other varieties have been introduced as even hardier) are known to be the hardiest palm trees in the world. Yes, an actual palm tree. Well, that word excited me. If the tree were to be a success in your Zone 5-7 garden it would never fail to impress and provide endless bragging rights for you. When purchased young, they make for attractive tropical-looking shrubs, but if you really wanted to take the plunge and buy a specimen so mature that it has developed a visible trunk, for most climates north of southern New Jersey there will be unfortunate damage to the tree that will be apparent during the summer. A possible exception may be a flawless micro-climate along with protection that would essentially add another zone of warmth and a shield against damaging arctic blast winds. Windmill palms in tree form may be for the intensive palm enthusiast who is willing to invest time and money in the endeavor, but they still have use as great looking understory shrubs for causal gardeners with their gorgeous palm palmate leaves that cannot be replicated with true north hardy plants.

The Saw Palmetto (Serenoa repens) and Sabal Minor

The Sabal Minor, also known as the dwarf palmetto, is actually native to the southeastern United States up to North Carolina. The saw palmetto may sound familiar from health stores, and is also a native to the more northern southern states. They are the palms that begin to dot the middle of the traffic islands on your road trips toward the Carolinas. Each are low lying palms in the north that have similar hardiness to the needle palm. A dense planting of young specimens host the ability to look exquisite and exotic in the northern garden with the right design.

The Pindo Palm (Butia capitata)

These pinnate leafed palms are exciting for being one of the very few tropical ‘palmy'-looking plant that is unmistakable. I haven’t had success with this plant, but I also lack adequate light in my shady garden. However, this plant more than likely requires all the aforementioned protection methods from a determined gardener. With success, the plant will return late spring re-growing a few elegant palm leaves that islands are famous for. Among an intelligently planned garden with other tropical-looking plants, it will make a dramatic statement. At almost any age, they are beautiful, yet larger plants yield better results.

There are many other palms that can be experimented with in the northern garden, and specialty plant shops are developing specially bred varieties for their ability to acclimate to the conditions of the northern states. The Chinese fan palm is a plant that, well not as hardy, can be cheaply purchased at stores such as Home Deopt and is worth a try. With more weird winters showing up such as the one we had in 2011, garden experimentation should be mandatory. Plant palms alongside other hardy tropical-looking plants to give people something to look at outside of the massive plantings of rhododendrons and forsythia bushes.


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    • profile image

      Marvin Heuser 14 months ago

      Can you tell me what palms hold their leaves all winter long? Or how long they hold their green lesves?

    • profile image

      Dan- Long Island, NY 20 months ago

      I planted a Brazoria Sabal Palm 4 years ago outside and it's doing fine. I do not cover it. One year it had leaf burn but it's growing faster each year. I fertilize it in spring with palm fertilizer but it seems to grow better when I leave it alone. Great palm for New York.

    • Melissa A Smith profile image

      Melissa A Smith 2 years ago from New York

      Hi Gisle, the most important part to spray is the crown of the plant where the leaves protrude. Since I am in the U.S. I don't know where to get this in Norway. Here I would use Amazon.

    • profile image

      Gisle Obrestad 2 years ago

      Hi:) I live in the southern parts of Norway, and keep a couple of windmill palms in the garden. The winters are mild(for Norway at least), wet and windy. You mention a copper-based fungicide for wet climates. Do you know any web-sites who sells this? Any recommendations? And you simply spray this on the leaves? A lot of questions, hope you´ll take the time to answer:)

    • Melissa A Smith profile image

      Melissa A Smith 2 years ago from New York

      LI is a 6b-7a. Windmill palms are the only tree palms you can try in this climate, although at that height they can be pricey, and they will need protection.

    • profile image

      Frank H 2 years ago

      What type of palm tree can I plant on Long Island. I am looking for something 5 or 6 feet high

    • profile image

      Frank H 2 years ago

      What Zone is Long Island New York.

    • Melissa A Smith profile image

      Melissa A Smith 2 years ago from New York

      What this?

    • profile image

      Yo 2 years ago

      Will this grow in lehi utah

    • Melissa A Smith profile image

      Melissa A Smith 4 years ago from New York

      We're in the same zone but we have longer bouts of cold and inclement weather, I imagine. I fear that my spears will pull once it starts to warm up. It happened to me a few years ago, that's when the fungus starts to set it.

    • profile image

      Anthony Iroler 4 years ago

      My needle palm and sabal palm are doing great so far no leaf burn or anything, but my windmill palm has lost all of its fronds as they have all dried out and turned brown. There is no spear pull yet I hope it makes it though fingers crossed I am in Virginia zone 6b.

    • Melissa A Smith profile image

      Melissa A Smith 4 years ago from New York

      rlhart, this winter is TERRIBLE. The palms in this video are doing pretty poorly, their leaves are already goners. I'll be elated if they make it through this alive. I haven't protected them too much, but have already done more than I did last year.

    • profile image

      rlhart 4 years ago

      Love this site. Hope to see it expand. I have a windmill palm that I've over wintered for the past two years, and planted it outside this summer. I live in S.E. Ohio zone 6 and have had -10 F temps. Not the best winter to try.

    • Melissa A Smith profile image

      Melissa A Smith 4 years ago from New York

      Good luck jillbear! Zone 5 will be a challenge, but if you don't get annoying weather like ice storms and/or if you protect them well it can be done.

    • profile image

      jillbear 4 years ago

      Thanks Melissa! couldn't figure out my planting zone until i went here then found your post, trying to grow palm trees in zone 5 is hard, love the tips :)


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