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How To Winter Wash Trees

Winter can be a challenging time for trees, with harsh weather conditions and the risk of pests and diseases. One way to care for your trees during this season is through winter washing. In this guide, we’ll share some tips on how to winter wash trees to keep them healthy and strong.

What is Winter Washing?

Winter washing is a process of cleaning trees during the dormant season to remove any pests or diseases that may be hiding in the bark. The process involves spraying a mixture of horticultural oil and water onto the tree's trunk and branches to suffocate insects and their eggs. This helps to prevent infestations from spreading and keeps your trees healthy.

When to Winter Wash Trees?

Winter washing should be done during the dormant season, which typically lasts from November to March. This is when most trees are not actively growing, making it easier to see and treat any issues. It’s important to do winter washing before new growth appears in the spring to ensure that any pests or diseases have been eliminated.

How to Winter Wash Trees?

Here are the steps to follow when winter washing trees:

Step 1: Choose the Right Weather Conditions

Winter washing should be done on a dry day when the temperature is above freezing. Avoid doing it when the temperature is below 40°F (4°C) as this can damage the tree. Also, avoid doing it when it's windy as the spray can drift and cause harm to nearby plants or structures.

Step 2: Mix the Solution

Mix one gallon of horticultural oil with ten gallons of water to create the solution. Use a stir stick to mix the solution thoroughly before pouring it into a sprayer or spray bottle.

Step 3: Spray the Tree

Starting at the top of the tree and working your way down, spray the solution onto the tree's trunk and branches. Make sure to cover all areas of the tree, including the undersides of branches and twigs. Do this until the entire tree is covered in the solution.

Step 4: Clean Up

Clean up any excess solution that may have dripped onto the ground or nearby plants. Dispose of any unused solution properly.

Benefits of Winter Washing Trees

Winter washing provides several benefits to trees, such as:

  • Preventing infestations from spreading to other trees in the area.
  • Reducing the number of harmful insects and their eggs.
  • Improving the overall health and appearance of the tree.

Winter washing is an essential part of tree care during the dormant season. By following our guide on how to winter wash trees, you can help keep your trees healthy and strong throughout the winter months. Remember to choose the right weather conditions, mix the solution correctly, and clean up properly after each use. Your trees will thank you for it!

A person spraying a tree trunk with a sprayer
A person spraying a tree trunk with a sprayer
winter tree care, tree pest control, horticultural oil, winter washing benefits, dormant season

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