How to Use Beets for Plant Fertilizer

How I Use Beets to Feed My Plants—And It Works!

How I Use Beets to Feed My Plants—And It Works!

source: Pixabay

If you’d told me, like, five years ago that I’d be out here burying beets in my backyard on purpose, I probably would’ve just stared at you and said something like, “Why?” Or maybe, “Gross.” I don’t know. I mean, they stain everything, they smell weird when they’re old, and they’re… beets. Root dirt balls. But somehow, yeah, now I’m using them in the garden like it’s the most normal thing ever.

And no, I’m not just tossing a full beet in the middle of the flower bed and calling it a day. That’d be kind of wild, right? Like a veggie sacrifice to the soil gods. But I am using them—on purpose—and it actually does something. Which still kind of surprises me every time.

So here’s how this started. I’m not some plant whisperer. I mostly got into gardening because I didn’t like spending money on fancy soil boosters, and also I felt bad chucking food scraps in the trash. I had these beets in the fridge that had gone a little too soft to eat—not rotten, just… sad. And instead of throwing them out, I buried a couple by my tomato plants. I wasn’t expecting much. Maybe a squirrel funeral. But a few weeks later, the plants around those spots? Bigger. Greener. Just… better. So I started wondering if that was actually a thing.

Turns out it is. Beets have all these nutrients—stuff like potassium, phosphorus, magnesium, nitrates. Good for people, but also really solid for plants. Like, potassium helps with root strength and keeping diseases off. Phosphorus is big for blooms and fruiting. Magnesium’s the photosynthesis one. And nitrates just make plants grow big and leafy, fast. So yeah. That random experiment kind of made sense once I looked it up.

beetroot juice for plants
source: Pixabay

But it’s not like you can just chuck raw beets around the yard and expect your garden to turn into Eden overnight. I’ve messed around with a few different methods, and some definitely work better than others.

Okay, method one: beet puree

This is the one I end up using the most. If I’ve got leftover beets—cooked or raw, doesn’t matter—I’ll toss them in a blender with some water. Peels too, I don’t bother separating them. You blend until it’s a thick, kind of gross-looking purple sludge, then dig little trenches around the base of your plants and pour it in. Not on the stems though—that attracts bugs, and not the good kind.

It breaks down slowly in the soil, kind of like compost but faster. Especially good for leafy stuff. Kale, lettuce, chard. Anything that loves nitrogen seems to dig it. No pun intended. Okay, maybe a little.

Compost option

If you’ve already got a compost thing going, beets are great for that too. They count as “green” material, which doesn’t mean color—it means nitrogen-rich. I usually shred them first so they break down quicker. The sugar in them helps feed the microbes that do all the compost magic. And when I toss shredded beets into a batch? It heats up faster and smells… less like death. So, win-win.

Beet water (it’s a thing)

This one’s lazy but effective. If you’re boiling beets for dinner or whatever, don’t dump the water. Let it cool, dilute it (I usually go one part beet water to three parts regular water, just so it’s not too intense), and then pour it around your plants. It’s not strong enough to burn anything, but it gives them a gentle nudge. I do it maybe once a week during growing season. Not every day. I’m not that consistent.

Bury the whole beet (strategically)

This is the one I started with, and it still works. But you have to be kind of smart about it. If the beet’s soft or sprouting, dig a hole 6–8 inches deep near a plant—not too close to the roots, not right on top—and bury it. That deep keeps pests out and avoids any weird rot situations. Over time, it just… melts into the soil and feeds the area around it.

But—and this is important—don’t bury a whole salad’s worth of beets at once. Learned that the hard way. Too much all at once is gonna make things weird. Smelly. Buggy. It’s like compost rules: balance, slow breakdown, small amounts. Start small. Really.

Also, don’t use anything that’s been cooked with salt or butter or vinegar or whatever. I mean, yeah, we season our food, but your soil does not want vinaigrette. Stick to raw beets or plain boiled. No frills.

beets for plants
source: Pixabay

What actually likes beets in the soil?

So far, leafy greens go crazy for it. Tomatoes too. Root veggies seem to like it—makes sense, right? You’re giving the soil more underground fuel. Even some flowers—marigolds, nasturtiums—perk up. The soil gets darker, holds water better. I’ve seen more worms show up, which I take as a good sign. And way fewer sad yellow leaves.

It’s made me realize how much we throw out that could actually be useful. Like, all the stuff we peel or toss or forget in the back of the fridge… there’s value in it, if you’re into dirt and worms and watching things grow. And also, I mean, gardening is not cheap. Fertilizer costs add up. So if using a beet saves me a few bucks? Cool. I’ll take it.

If this sounds weird to you—I get it. I really do. It felt a little too… I don’t know, folk remedy, compost witch, whatever. But try it. One plant. Try the beet water. Or the puree thing. Worst case, it’s compost. Best case, your plants look like they’ve been secretly juicing.

So yeah. I use beets now. For plants. Not because I planned it. Not because I love beets. But because it works. And because my tomatoes don’t care if it started as an accident. They just keep growing.


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