Resin wicker can crack in the cold, but the cold alone is rarely what does it. Two things decide it: which plastic the strand is made of, and whether it takes a sharp knock while it is frozen. Polyethylene, the HDPE that better all-weather wicker uses, stays flexible far below any American winter. PVC strand is naturally rigid and only flexible because of added plasticizers, which is why cheap wicker is the kind that cracks. And any plastic is more brittle under a sudden blow than a slow push, so a frozen chair that gets dropped, kicked or shoveled is at far more risk than one left alone. Real wicker is a different problem: it is plant fiber, and water is its enemy.
First, "wicker" is a weave, not a material
The word describes how the furniture is made, not what it is made of. Strands are woven over a frame. The strand might be natural rattan, cane, willow or paper fiber, or it might be an extruded plastic made to look like them, sold as resin, synthetic or all-weather wicker.
So "resin wicker vs real wicker" is really two questions:
- Real wicker: natural plant fiber woven over a frame, usually wood or rattan. Built for porches and sunrooms, not open weather.
- Resin wicker: a plastic strand woven over a frame, usually aluminum or steel. Built to live outside, with the details deciding how well.
The frame under the weave matters as much as the weave, and we come back to it below.
Why cold makes plastic brittle
This is the mechanism no furniture seller explains, and it is what actually answers the question.
Zeus Industrial Products, a US polymer tubing manufacturer, published a technical whitepaper called Low Temperature Properties of Polymers (2005, hosted by Appalachian State University, read September 11, 2026). Its core points, in plain terms:
- Plastics have a glass transition. Above a certain temperature range, the long molecules can slide past each other and the plastic is flexible. Below it, the material behaves like a glassy solid: "very hard and also very brittle," with impact resistance "hugely decreased."
- Polyethylene's transition is extremely low. The whitepaper lists low-density polyethylene at roughly minus 120 to minus 100 degrees Celsius and says polyethylene "of most varieties (LD, HD, UHMW etc.)" is in the flexible state at room temperature. No backyard in the lower 48 comes anywhere near that.
- PVC is glassy at room temperature. It lists PVC's transition around 90 degrees Celsius and calls PVC "a special case because it can be easily modified to be rubbery by the addition of plasticizers." In other words, flexible PVC is flexible because of what was added to it.
- Speed matters as much as cold. The whitepaper's Note 3: "A rapidly applied load at room temperature can have exactly the same effect as a much higher load at low temperatures. Brittleness in plastics is as much a function of time as it is of temperature."
Figures in the whitepaper are typical values, and it says specific grades vary. But the direction is clear, and it explains everything the sellers only assert.
HDPE vs PVC strand: which one you have
Sellers of HDPE wicker consistently describe PVC strand as the budget option and say its plasticizers leach out over time, especially in sun, leaving it brittle. LOOMLAN's all-weather wicker guide (read September 11, 2026) is a representative example. That is a seller's claim, but it matches the mechanism: a material that is only flexible because of an additive becomes less flexible as the additive goes.
How to find out what you are buying:
- Look for the resin named in the listing or on the tag. "HDPE" or "high-density polyethylene" is a specific claim. "Resin," "synthetic," "PE rattan" and "all-weather" alone are not.
- Ask the seller directly if the listing does not say. A maker using HDPE usually says so, because it is the selling point.
- Check the warranty on the weave itself, separately from the frame. How long a maker will stand behind the strand tells you how confident they are in it.
- Treat a very low price for a full set with some suspicion. We are not quoting prices, but a strand material that costs less to make is one of the ways a set gets cheap.
Already own it and do not know? Inspect a hidden spot. PVC strand that has lost its plasticizer tends to feel stiffer and look chalky or faded. That is an observation, not a lab test, so if the set came with paperwork, trust the paperwork.
How to stop resin wicker cracking in cold weather: avoid impacts while frozen
Because brittleness is about speed as well as temperature, most winter cracking you can control is impact damage.
- Do not drop or throw frozen chairs. Carrying a chair to the shed on a frosty morning and dropping it on the slab is a fast load on cold plastic.
- Do not shovel or chip snow and ice off the weave. Brush it off with something soft, or let it melt. A shovel edge against a frozen strand is the textbook case.
- Do not sit down hard on a frozen seat. A slow sit is a slow load. A heavy drop is not.
- Do not stack cold chairs roughly. Stacking points concentrate force on a few strands.
- Keep heavy snow loads off seats. A deep, wet snowfall sitting on a woven seat bears down on strands that are at their least forgiving.
None of that requires bringing the set inside, which matters if the garage is already full.
The frame, and the water inside it
The weave is usually what people ask about. The frame is often what actually fails.
Resin wicker is woven over aluminum or steel. Aluminum does not rust. Steel does, and the weave hides it until the rust is advanced. A hollow frame that lets water in and cannot drain can also hold water that freezes and expands. Look for drain holes, and ask what the frame is made of before you buy.
If you store the set, let it dry completely first. A wet set in a closed shed is the same trapped-moisture problem we describe in how to store a tow-behind lawn sweeper: the damp does its work while you are not looking.
Real wicker in winter: moisture is the enemy, not cold
Natural wicker is plant fiber. Cold is not its main problem. Water is.
The US Environmental Protection Agency's brief guide to mold and moisture (read September 11, 2026) says "the key to mold control is moisture control" and that wet items should be dried within 24 to 48 hours to prevent mold growth. Natural fiber that sits in rain, snow and dew outdoors is not going to get dried within that window, all winter long.
That is why real wicker belongs under a roof: a covered porch, a sunroom, or storage. If you use the patio in shoulder seasons, a porch roof extends real wicker's usable months. Siting furniture under cover changes more than you would think, as we found looking at fire pits under a covered patio. Natural wicker left in the open yard over winter is not a cold-weather question. It is a mildew-and-rot question.
Leaving resin wicker out all winter
If your set is HDPE on an aluminum frame, leaving it out is a reasonable choice in most US climates, with sensible precautions:
- Bring cushions in. Cushion care is its own topic, but cushions left out are the first thing to mildew.
- Cover it with a breathable cover, or not at all. A non-breathable cover can trap condensation against the weave and frame.
- Group it somewhere sheltered from wind, so the pieces are not knocked over and cracked.
- Leave it alone when it is frozen.
If you like to sit out on cold evenings, the furniture is usually the least of the problems. Heat is the harder one, and sizing a heater is its own calculation, covered in how many BTU patio heater you need.
If the set is PVC strand, or you do not know, storage over winter is the safer default.
Real wicker vs resin wicker, in one table
| Real wicker | Resin wicker (HDPE) | Resin wicker (PVC) | |
|---|---|---|---|
| Material | Plant fiber | Polyethylene strand | PVC strand, plasticized |
| Main enemy | Water, mildew | Impact while frozen, UV over years | Loss of plasticizer, cold impact |
| Winter outdoors, uncovered | No | Usually yes, with care | Risky |
| Where it belongs | Porch, sunroom, indoors | Patio, open yard | Covered patio, stored in winter |
| Repairable if a strand breaks | Often by a caner | Hard, weave is continuous | Hard |
Frequently asked questions
Can resin wicker stay outside in winter? Usually, if the strand is HDPE and the frame is aluminum. Polyethylene stays flexible far below any US winter temperature, according to a polymer maker's technical whitepaper. Bring cushions in, avoid knocking the furniture while it is frozen, and use a breathable cover or none. PVC strand, or a steel frame, makes storage the safer call.
Why did my resin wicker crack? Two common reasons. The strand may be PVC that relies on plasticizers to stay flexible and has lost some of them to age and sun, or it took a sharp impact while cold, such as a drop, a shovel or a heavy sit. Brittleness in plastics depends on how fast a load is applied as well as on temperature.
Is HDPE wicker better than PVC wicker? For outdoor use in a cold climate, the mechanism favors HDPE. Polyethylene's glass transition is extremely low, so it stays flexible in cold, while PVC is rigid at room temperature unless plasticized. Check the listing for the resin by name, because "resin" or "all-weather" alone does not tell you.
Can you leave real wicker outside? Not in open weather. Natural wicker is plant fiber, and the EPA's guidance is that wet materials need drying within 24 to 48 hours to prevent mold. Outdoor rain, snow and dew keep it damp far longer. Keep it on a covered porch, in a sunroom, or in storage over winter.
Yard Insight has not tested wicker furniture, and this article makes no claim otherwise. No product is named, ranked or linked for sale. Sources read September 11, 2026: Zeus Industrial Products' whitepaper Low Temperature Properties of Polymers (2005), the US EPA's brief guide to mold and moisture, and LOOMLAN's all-weather wicker guide (a seller's page, cited as such).
