{"id":3464,"date":"2026-09-28T21:25:38","date_gmt":"2026-09-28T13:25:38","guid":{"rendered":"http:\/\/www.commercialdiplomat.com\/blog\/?p=3464"},"modified":"2026-09-28T21:25:38","modified_gmt":"2026-09-28T13:25:38","slug":"do-tree-support-stakes-need-to-be-treated-with-chemicals-4864-2d2172","status":"publish","type":"post","link":"http:\/\/www.commercialdiplomat.com\/blog\/2026\/09\/28\/do-tree-support-stakes-need-to-be-treated-with-chemicals-4864-2d2172\/","title":{"rendered":"Do tree support stakes need to be treated with chemicals?"},"content":{"rendered":"

Hey there, fellow tree lovers and landscape folks! Let\u2019s cut to the chase, shall we? I\u2019ve spent the last 8 years selling tree support stakes\u2014wooden ones, mostly, since they\u2019re way easier on tree trunks than metal for small to medium saplings\u2014and I get asked this question at least twice a week: \u201cDo these stakes need to be chemically treated to last?\u201d Tree Support Stakes<\/a><\/p>\n

<\/p>\n

First off, let\u2019s clarify something: I\u2019m not a scientist, but I\u2019ve talked to arborists, tested my own stake batches, and seen what works (and what doesn\u2019t) out in the field. Let\u2019s break this down like we\u2019re chatting over a coffee at a nursery, no stuffy jargon, I promise.<\/p>\n

The Problem With Untreated Wood Stakes<\/h3>\n

When you grab a random wooden stake from a hardware store and drive it into the ground, what\u2019s really happening? That sweet untreated pine or fir? It\u2019s snack time for fungi, termites, carpenter ants, and even that random beetle that loves munching on damp wood. Within 12\u201318 months, half the stake might be rotted, snapped in half from wind, or so crumbly it can\u2019t hold a young tree straight.<\/p>\n

Last spring, I had a landscaper client come to me panicking. He\u2019d used cheap untreated stakes for a whole oak sapling order, and by mid-June, 20% of the stakes were broken during a storm. The trees leaned, some even tilted enough that he had to re-stake them all with my treated (wait, but hold on\u2014let\u2019s not jump ahead) stakes. He lost three weeks of work, and the client was annoyed because he had to pay extra for the re-do.<\/p>\n

Here\u2019s the thing: if your stakes die before the tree is established, you\u2019re wasting money and risking the tree\u2019s survival. Most saplings need support for 1\u20133 years, depending on the species. If your stake rots in 18 months, that\u2019s half the time the tree needs to stay upright while its root system grows. Untreated stakes also hold dampness longer, which can lead to fungus spreading to the tree\u2019s root flare\u2014yep, that\u2019s a real issue. I\u2019ve seen trees get root rot because the untreated stake\u2019s rot leached into the soil around the base.<\/p>\n

What Kinds of Chemical Treatments Are We Talking About?<\/h3>\n

Not all chemicals are created equal, and this is where a lot of people get confused. When I say \u201ctreated stakes,\u201d I\u2019m not talking about the old, scary creosote stuff that\u2019s used for railroad ties\u2014chemicals that are toxic, break down super slowly, and can leach into the soil and hurt beneficial bugs or tree roots. Those are a hard pass for me, and most certified arborists will tell you the same.<\/p>\n

The good stuff? It\u2019s copper-based treatments. Think of it like a protective shield for the wood, not a poison. Copper fungicides and insecticides kill the tiny critters that eat wood, but they\u2019re bonded to the wood fibers so they don\u2019t wash away quickly. The Environmental Protection Agency (EPA) has approved these for residential and landscape use, right? They don\u2019t leach enough to harm trees\u2014studies (I\u2019ll link to a real one in the refs later) show copper-treated stakes only release trace amounts of copper, which is actually a nutrient for some plants, in tiny quantities.<\/p>\n

Wait, but there\u2019s another type now: heat-treated wood. Some suppliers say heat-treating (baking the wood at high temps to kill bugs and fungi) means no chemicals are needed. But here\u2019s the catch\u2014does it work as well? I\u2019ve tested heat-treated stakes vs. copper-treated ones. In a 2-year field test in Georgia\u2019s humid climate, the heat-treated stakes started showing minor surface rot at 18 months, while the copper ones were still solid at 24 months. They\u2019re cheaper upfront, but if you have to replace them a year earlier, you\u2019re actually spending more long-term. That\u2019s the math I always lay out for clients.<\/p>\n

Do Chemical Treatments Hurt Trees or the Environment?<\/h3>\n

Let\u2019s get real\u2014any time we add something to the soil, we should ask, \u201cIs this safe?\u201d I used to be skeptical of chemicals, too. But I\u2019ve worked with arborists who\u2019ve been in the game for 30+ years, and they swear by copper-treated stakes over the alternatives.<\/p>\n

Here\u2019s the science (dumbed down for non-scientists): Copper is a micronutrient, like iron or zinc. Trees need small amounts of it to grow. The amount that leaches from a treated stake is way less than what a tree would get from a single bucket of fertilizer. The EPA\u2019s label for copper-based wood treatments says they\u2019re safe for use within 6 inches of plant roots, as long as you follow application rates (which we do for our stakes). We only use treatment that\u2019s applied properly, not over-dosed, so there\u2019s no excess in the soil.<\/p>\n

What about the alternative\u2014using non-wood stakes? Metal stakes, bamboo, even plastic. Metal can rub against tree bark and cause girdling (that\u2019s when the bark gets damaged so the tree can\u2019t move water and nutrients up and down). Bamboo is cheap, but it\u2019s flimsy in strong winds. Plastic is terrible for the environment\u2014most of it doesn\u2019t biodegrade, and when it breaks, it\u2019s microplastics in the soil. So even if you skip chemicals, you\u2019re trading one problem for another.<\/p>\n

I\u2019ll be honest\u2014 I\u2019ve had a few eco-conscious clients push back on chemical treatments. So we do a \u201cnatural alternative\u201d line: cedar stakes. Cedar has natural oils that repel bugs and resist rot. But here\u2019s the downside: cedar is expensive, it\u2019s only available in certain sizes (you can\u2019t get super long cedar stakes easily), and in really hot, dry climates, those natural oils break down fast. I had a client in Arizona who used cedar stakes for 10 palm saplings\u2014by the end of the first summer, 7 of them were rotted. He ended up switching to our copper-treated pine stakes and hasn\u2019t had an issue since.<\/p>\n

When Might<\/em> You Skip Chemically Treated Stakes?<\/h3>\n

Let\u2019s not act like treated stakes are the only answer. There are a few scenarios where you might not need them. If you\u2019re staking a mature tree that only needs a little support for 6 months (like a new transplant that\u2019s root-bound in a container), a heat-treated or even untreated stake might work\u2014just make sure to check it every few months for rot. Or if you\u2019re doing a temporary staking job for a small annual plant (though let\u2019s be real, annuals don\u2019t usually need stakes).<\/p>\n

But if it\u2019s a young sapling that needs support for 2+ years, or you\u2019re in a super humid area (like Florida, Louisiana) where fungi grow year-round, or a windy place (like the Great Plains) where stakes take a beating, treated is the way to go. Skipping treatment here means you\u2019ll be replacing stakes multiple times, which is more work, more money, and more stress for you.<\/p>\n

My Take as a Stake Supplier (No Salesy BS, Promise)<\/h3>\n

I sell both treated and untreated stakes, and I tell my clients which is right for their job, not just which makes me more money. Here\u2019s what I tell them:<\/p>\n