Do Metal Trellises Burn Plants? (Facts and Myths!)

As the saying goes, “it takes a village to raise a child,” but what about raising plants? 

Every gardener knows the importance of supporting their plants, and metal trellises have become a popular tool to help plants grow tall and strong.

However, some worry that metal trellises might actually harm their plants by burning them.

In this article, I’ll dive deep into the facts and myths surrounding this concern and discover whether metal trellises can burn plants.

Do Metal Trellises Burn Plants?

Firstly, it’s important to understand that metal is a good conductor of heat, meaning it can get hot when exposed to direct sunlight.

However, not all metals have the same thermal conductivity, so choosing the right type of metal for your trellis is essential.

Metals like aluminum and stainless steel have lower thermal conductivity than others, making them a safer choice for use in gardens.

Another factor to consider is the amount of sunlight your plants receive.

If your plants are exposed to direct sunlight for long periods, the metal trellis may absorb and radiate heat, potentially causing the plants to overheat or even burn.

Therefore, it’s essential to position your metal trellis in a location that provides partial shade and does not expose your plants to direct sunlight for extended periods.

Lastly, regular maintenance and monitoring of your plants’ health are critical.

Overgrown vines or plants too close to the trellis may come into contact with the metal, increasing the risk of burns.

Therefore, keep your plants pruned and ensure they’re not in direct contact with the metal trellis.

In conclusion, while metal trellises can potentially harm plants if used incorrectly, the risk can be minimized with proper installation, choice of materials, and maintenance.

If you take the necessary precautions and monitor your plants’ health, metal trellises can be a safe and effective tool for supporting your garden’s growth.


  • Metal trellises can get hot when exposed to direct sunlight, potentially causing harm to plants.
  • The type of metal used in the trellis affects its thermal conductivity, with metals like aluminum and stainless steel having lower thermal conductivity and being safer for gardens.
  • Proper installation, location, and maintenance of the metal trellis can minimize the risk of harm to plants.
  • Regularly monitoring plant health and keeping plants pruned and away from the metal trellis is essential to minimize the risk of burns.


  • All types of metal trellises will burn plants.
  • Metal trellises are always dangerous and should never be used in gardens.
  • Metal trellises are entirely safe and will never harm plants under any circumstances.
  • Once a metal trellis is installed, there’s no need to check or maintain it.

Will Vines Grow On a Metal Trellis?

Yes, vines can grow on a metal trellis. In fact, metal trellises are a popular choice for supporting vine growth in gardens.

Vines, such as clematis, grapevines, and climbing roses, usually grow well on metal trellises. Metal trellises provide a sturdy structure for the vines to climb and support the weight of their foliage and fruit.

To encourage vines to grow on a metal trellis, you should position the trellis in a location that gets enough sunlight and plant them close to the trellis, so they can easily climb it.

Also, you may need to tie the vines to the trellis until they climb and attach themselves to the structure.

When installing a metal trellis for vine growth, it’s important to choose a trellis with large openings for the vines to grow through and to ensure that the metal is strong enough to support the weight of the vines as they grow.

Regular maintenance of the trellis (removing any rust or damage) can also help ensure its longevity and continued support for your vines.

How Do You Keep a Metal Trellis From Rusting?

You can prevent a metal trellis from rusting in the following ways:

  • Apply a protective coating: A protective coating, such as paint or varnish, can help prevent rusting. Choose a high-quality product that is designed specifically for metal and outdoor use.
  • Use rust-resistant materials: When purchasing a metal trellis, choose a rust-resistant material, such as stainless steel or aluminum. These materials are less likely to rust than other types of metal.
  • Clean and dry the trellis regularly: Regularly cleaning and drying the trellis can help prevent rust from forming. Use mild soap and water to clean the trellis, and ensure it’s completely dry before storing it.
  • Apply a rust inhibitor: These products can help prevent rust from forming on metal surfaces. Look for a product designed for outdoor use and follow the instructions carefully.
  • Store the trellis indoors: If possible, store the trellis indoors during periods of inclement weather. Rain, snow, and other moisture exposure can speed up rusting.


In the end, the answer to whether metal trellises burn plants is a nuanced one.

While it’s true that metal can get hot and potentially harm your plants, as long as you choose the right type of metal, install your trellis correctly, and take care to monitor your plants’ needs, you can enjoy the benefits of a metal trellis without any risk of harm.

So, don’t be afraid to add a metal trellis to your garden – remember to treat it with the care and respect your plants deserve!

You can also use trellises to block wind, add privacy, and create a cozy atmosphere on your patio. For more information, see our other article: How To Block Wind on Patio.

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