Learning how to wrap shrubs for winter is a key task for any gardener looking to protect their landscape investment. Wrapping shrubs for winter protects them from drying winds and heavy snow that can break branches. This simple process can mean the difference between vibrant spring growth and a season of disappointment.
Not every shrub needs this care, but for many, it’s essential. This guide will walk you through everything you need to know, from identifying which plants to protect to the step-by-step wrapping process and spring removal.
How To Wrap Shrubs For Winter
The core process of winterizing your shrubs involves more than just throwing a cover over them. It’s about creating a protective microenvironment. Proper technique prevents damage from the elements while still allowing the plant to breathe.
Why Winter Wrapping Is Necessary
Winter presents several threats that wrapping directly mitigates. The primary dangers are not always from the cold itself, but from accompanying conditions.
First, winter sun and wind cause moisture loss from evergreen foliage. Since the ground is frozen, the roots cannot replace this water, leading to desiccation or “winter burn.” This appears as brown, dried-out leaves, especially on the windward side.
Second, heavy snow and ice can physically weigh down and snap branches, ruining the shrub’s shape. A supportive wrap holds branches together, distributing the load.
Third, rapid temperature fluctuations can cause bark to split, particularly on young or thin-barked shrubs like some hydrangeas and fruit bushes. A wrap buffers these sudden changes.
Which Shrubs Need Winter Protection
Not all shrubs require wrapping. Focus your efforts on these categories for the best results.
- Broadleaf Evergreens: These hold their leaves year-round and are highly susceptible to winter burn. Examples include Rhododendron, Azalea, Holly, Boxwood, and Mountain Laurel.
- Tender or Newly Planted Shrubs: Any shrub planted in the last two to three years has a less established root system and benefits from protection. This includes non-native species that may not be fully hardy in your zone.
- Early Bloomers: Shrubs that set flower buds in the fall, like Hydrangea macrophylla (bigleaf hydrangea), need their buds protected to ensure a spring bloom.
- Columnar or Upright Shrubs: Plants with narrow, vertical forms, such as some Arborvitae cultivars, are prone to splaying open under snow load.
Assessing Your Specific Climate Zone
Your USDA Hardiness Zone is a critical factor. A shrub that’s borderline hardy for your zone is a prime candidate for wrapping. Microclimates in your yard also matter. A shrub in an exposed, windy location needs more protection than one sheltered by a fence or wall.
When To Wrap Your Shrubs
Timing is crucial. Wrap too early, and you risk creating a humid environment that promotes mold or delays the plant’s natural dormancy. Wrap too late, and the damage may have already occured from an early freeze.
The best time is in late fall, after several hard frosts have occured and the plant is fully dormant. The soil should be cold, but not yet frozen solid. A good rule of thumb is to wrap after Thanksgiving but before the deepest cold of December sets in, depending on your region.
Materials And Tools You Will Need
Choosing the right materials makes the job easier and more effective. Avoid using non-breathable plastics like trash bags, as they trap heat and moisture on sunny days, which can cook the plant or cause disease.
- Burlap: The classic choice. It’s breathable, sturdy, and provides excellent windbreak. Natural jute burlap is best; avoid synthetic or treated burlap.
- Shrub Covers: Pre-made, reusable covers made from breathable fabric are available in various sizes. These are very convenient.
- Stakes: Wooden or metal stakes to create a frame, preventing the material from touching the foliage.
- Twine or Bungee Cords: For securing the wrap. Use soft twine that won’t cut into branches.
- Mulch: Bark mulch, straw, or shredded leaves for insulating the root zone.
- Pruners: For any light, pre-wrapping tidy-up of dead or damaged branches.
Step-By-Step Wrapping Instructions
Follow these steps carefully to ensure you provide effective protection without harming your shrubs.
Step 1: Prepare The Shrub
Start by giving the shrub a light inspection and cleaning. Remove any fallen leaves or debris from around the base, as this can harbor pests and disease.
- Water the shrub deeply a day or two before wrapping, if the ground is not frozen. This provides essential moisture reserves for the roots.
- Apply a 3 to 4 inch layer of mulch around the base of the shrub, extending out to the drip line. Keep the mulch a few inches away from the main stem to prevent rot.
- Do any necessary pruning only to remove clearly dead, diseased, or crossing branches. Major shaping should be done in late winter or early spring for most species.
Step 2: Install Support Stakes
For larger shrubs or those you’re wrapping with loose burlap, a support frame is vital. It keeps the material from resting on and damaging the foliage, and allows for air circulation.
Drive three or four stakes into the ground around the shrub, creating a cage-like structure. The stakes should be taller than the shrub. For smaller shrubs, a simple teepee of three stakes is sufficient.
Step 3: Wrap The Shrub
This is the core of the process. If using a pre-made cover, simply drape it over the support frame and secure it at the bottom.
For burlap, start at the bottom and wrap it loosely around the stakes, not the plant itself. Overlap the layers by a few inches as you spiral upward. The goal is to create a windbreak, not an airtight seal. The wrap should be snug against the stakes but have plenty of air space around the plant inside.
Step 4: Secure The Wrap
Use twine or bungee cords to tie the burlap or cover to the stakes at several points. Finally, secure the bottom of the material to the stakes, but do not tie it tightly around the main stem of the shrub. Leave the bottom somewhat open to allow for air flow and prevent rodents from making a home inside.
For columnar shrubs, you may simply need to wrap twine around the plant in a spiral, starting at the bottom and working up, to hold branches tightly together against snow load.
A Note On Rose Cones And Other Specialty Protectors
For tender roses or small shrubs, foam or plastic rose cones can be used. Ensure you weigh them down with a brick or rock so they don’t blow away. Always punch ventilation holes in the top of solid plastic cones to prevent heat buildup.
Step 5: Label Your Work
It may seem obvious now, but come spring, a wrapped shrub can be forgotten. Tie a bright weatherproof tag or ribbon to a stake. This reminds you to remove the wrap at the proper time.
Common Winter Wrapping Mistakes To Avoid
Even with good intentions, it’s easy to make errors that can hurt your shrubs.
Using Non-Breathable Materials
Plastic sheeting or bags create a greenhouse effect. On a sunny winter day, temperatures inside can soar, stimulating growth or causing condensation that freezes at night, damaging tissues. Always opt for breathable fabrics like burlap or commercial frost cloth.
Wrapping Too Tightly
A wrap that is too tight can constrict branches, rub off buds, and create a haven for moisture and pests. The wrap should be loose and allow for some movement and air flow.
Leaving The Wrap On Too Long In Spring
This is perhaps the most common mistake. As temperatures warm in late winter or early spring, the plant needs to acclimate and receive sunlight. Leaving the wrap on too long can lead to mold, mildew, and tender new growth that is unprepared for late frosts.
Neglecting The Root Zone
Protecting the above-ground parts is only half the battle. A thick layer of mulch over the root system is just as important. It insulates the soil, moderates temperature swings, and conserves moisture.
When And How To Remove Winter Wraps
Removal timing is critical for a healthy start to the growing season. Plan to remove wraps in early to mid-spring, but be patient.
Watch The Weather
Choose a period when daytime temperatures are consistently above freezing and the threat of a severe, hard frost has passed. Often, this is when the local forsythia begins to bloom. It’s best to remove the wrap on a cloudy, calm day to prevent shocking the plant with sudden bright sun and wind.
The Removal Process
- Carefully untie or cut the fastenings. Gently pull the wrap away from the shrub.
- Inspect the plant for any signs of rodent damage, mold, or broken branches.
- Remove the support stakes.
- Pull back the thick root-zone mulch from the stem, leaving a thinner layer to suppress weeds.
- Give the shrub a good drink of water if the soil is dry.
Store your burlap or covers in a dry place so they are ready for use next fall.
Alternative Winter Protection Methods
Wrapping isn’t the only strategy. For some shrubs or situations, these methods may be preferable or used in combination.
Anti-Desiccant Sprays
For broadleaf evergreens, an anti-transpirant or anti-desiccant spray can be applied to the leaves in late fall. This coats the foliage with a thin, waxy film that reduces moisture loss. It needs to be reapplied if temperatures rise above 50°F for an extended period.
Creating A Windbreak
Instead of wrapping individual shrubs, you can install a temporary burlap screen on the windward side of a planting bed. Stake tall burlap sheets between posts to shield multiple plants from prevailing winds.
Snow Fencing
Similar to a windbreak, a section of snow fence installed a few feet away from vulnerable shrubs can effectively break the wind and catch drifting snow before it buries your plants.
Frequently Asked Questions
Should You Wrap All Shrubs For Winter?
No, you should not wrap all shrubs. Focus on broadleaf evergreens, tender or newly planted specimens, early bloomers, and shrubs that are not fully hardy in your climate zone. Native, established deciduous shrubs typically do not require wrapping.
What Is The Best Material For Wrapping Shrubs?
The best material is breathable, durable fabric. Natural burlap is an excellent, cost-effective choice. Commercial shrub wraps or frost cloth made from polypropylene fabric are also very good and often reusable for several seasons.
When Is It Too Late To Wrap Shrubs?
It is generally too late to wrap shrubs after the ground has been frozen solid for an extended period and after severe winter weather has already caused damage. However, if an unexpected severe cold snap is forecasted, providing protection even mid-winter can be beneficial for vulnerable plants.
Can You Use Old Sheets Or Blankets To Wrap Plants?
Old sheets or blankets can be used in a pinch for light frost protection, but they are not ideal for long-term winter wrapping. They are not as breathable as burlap and can become heavy and soggy when wet, potentially collapsing onto the plant and causing damage.
How Do You Protect Shrubs From Heavy Snow Without Wrapping?
For heavy snow, you can gently brush accumulations off branches with a broom before the weight causes damage. For upright shrubs, tying branches together loosely with twine before winter starts can prevent splaying. Building a simple A-frame cover with wood and burlap over low-growing shrubs is another effective tactic.
Implementing these strategies for how to wrap shrubs for winter will greatly increase your plants chances of thriving through the cold months. The effort you put in during the fall pays off with healthy, beautiful shrubs that are ready to grow when spring finally arrives. Remember, the key is understanding your specific plants and local conditions to provide the right level of protection.