Onion, Potato and Orange Peel Water for Plants: What Each Does (Video)

Transcript

Peel Power for Plants

Ever wondered if those kitchen peels could give your garden a little boost?

Peel water basics

Onion peel water, potato peel water, and orange peel "fertilizer" are three different things. Potato peel water pulls out a bit of starch and some potassium. Onion peel water mostly gives you amber-colored water, and orange peel water carries fragrant oils but very little plant food. The real value stays in the peels themselves, so chopping and composting them is far more beneficial. If you do soak them, keep the jar covered, use the liquid within 48 hours, dilute it, and never pour smelly water directly onto leaves.

At a glance

Here’s a quick cheat sheet: soak for 24 to 48 hours, covered, then use the same day. Dilute the peel water with an equal part of plain water. Water your plants once a week or two, replacing a regular watering. And remember, the best use of the peels is to chop them and compost or bury them five to eight centimeters deep.

Why water is weak

A peel keeps most of its nutrients locked inside its cells. Soaking for a day or two only releases what dissolves easily, a little potassium, sugars, some starch, and colour. The rest, including most calcium and the fibre that feeds soil life, stays in the soggy peel you strain off. After a couple of warm days, bacteria start using up the oxygen, making the water less friendly for plants.

Strain the water, but keep the peel. The peel is where most of the goodness is.

Peel comparison

Onion skins are dry fibre with a touch of potassium, calcium and the pigments that turn the water amber. That colour is why people think it’s strong, but the actual nutrients are minimal. Potato peels bring starch, some potassium and moisture, a bit more food for the soil. Orange peels add a pleasant scent and a few sugars, but not much else. Mixed vegetable peels give a little of everything, but the real benefit is still in the solid peel material.

Make peel liquid

To make a simple liquid, collect about a cup of fresh peels from a day’s cooking, give them a quick rinse, and chop them into two-to-three-centimeter pieces. Toss the pieces into a jar, add a litre of water, cover the jar with a lid or a tight cloth to keep mosquitoes out, and let it sit in the shade for 24 to 48 hours. Strain the liquid, dilute it 1:1 with plain water, and use it in place of a regular watering.

Compost beats soaking

All three peels give far more when they decompose slowly in soil. A bucket layered with peels, dry leaves or shredded cardboard turns into dark, crumbly compost in a few months, feeding plants evenly. If space is tight, chop the peels small and bury them five to eight centimeters deep near the edge of a large pot, moving to a fresh spot each month. This slow breakdown releases nutrients more steadily than any quick soak.

Fun facts

Onion skins have been used for centuries to dye cloth and eggs in shades from gold to rust brown. The mist that sprays when you bend an orange peel is mostly limonene, an oil that’s flammable enough to light a small flame. A potato ‘eye’ is a real bud, and a peel strip with an eye can grow into a whole new plant.

Safety first

A few safety tips: keep onion scraps and peels away from dogs and cats, and never let green or sprouted potato peels reach pets. Uncovered peel water can become a mosquito breeding ground in just a couple of days, so always cover the jar and use the liquid within 48 hours. Wash any store-bought produce before peeling to remove pesticide residues, and wash your hands after handling rotting peels or soil.

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Read the full guide

For the full guide, with every detail and answers to common questions, visit thecareonline.com. You'll find more short videos like this one on our YouTube channel. This is general information, not medical advice, so check with your doctor about your own situation.