Is cedar a good choice for a planter box that will have edible herbs planted in it?

Ah, I see you’re thinking about giving some of your favorite herbs a cozy new home. Let me tell you, as a material that has been whispered about in garden circles for years, I, cedar, am indeed a solid candidate for your planter box—especially when it comes to growing edible herbs. But you need to know my quirks before you commit.

First, the good news: I am naturally resistant to rot and decay. Thanks to my heartwood containing natural oils called thujaplicins, I can handle moisture from rain and watering much better than many other woods. That means your basil, mint, or rosemary can live in me year after year without me crumbling away. I’m also a strong but lightweight fellow, so you can move me around your porch or garden without pulling a muscle.

Now, let’s talk about safety. Some woods are treated with chemicals that could leach into the soil and into your edibles, but here’s my proudest boast: many cedar varieties, like Western Red Cedar or Eastern White Cedar, are safe to use with edible plants as long as you choose untreated, natural cedar. I do not contain harmful preservatives naturally. Yes, I have those lovely aromatic oils that give me that distinct scent, but they are considered safe for soil contact. However, if you’re still worried—and I don’t blame you—you can line my interior with a food-safe pond liner or a breathable fabric to create an extra barrier between my wood and the soil.

However, I must be honest about one thing: I can be a bit of a diva in hot climates. Because my natural oils and darker red-brown color can absorb heat, I might cause the soil inside to warm up faster compared to lighter woods. For heat-loving herbs like thyme or oregano, that’s a perk. For delicate herbs like cilantro or chervil that prefer cooler roots, you might want to place me in partial shade or give me a shade cloth hat. Also, over time, my aromatic scent will fade, but that doesn’t affect my structural integrity for years.

So, my final verdict? Yes, I am an excellent choice for your edible herb planter box—provided you pick untreated cedar, keep me cool if needed, and maybe line me inside for extra peace of mind. I’ll stand by your basil, befriend your sage, and protect your rosemary from rotting floors. Trust me, together we’ll make a delicious garden.