Organic Fertilisers: Best Natural Plant Feeds You Can Make at Home
Commercial fertilisers are expensive and often unnecessary. These organic alternatives cost almost nothing and work as well or better.
Why Go Organic?
Chemical fertilisers give plants a quick fix but do nothing for long-term soil health — in fact, heavy use degrades soil structure over time. Organic fertilisers feed the soil ecosystem (bacteria, fungi, earthworms) which in turn feeds your plants more efficiently and sustainably.
1. Compost Tea
Fill a bucket with rainwater, add a handful of mature compost, stir vigorously, leave 24 hours, strain, and water your plants with it. This delivers a full spectrum of nutrients plus beneficial microbes. Use once every two weeks as a soil drench.
2. Coffee Grounds
Used coffee grounds add nitrogen, potassium, and magnesium to soil. Sprinkle thinly on the soil surface (thick layers can form a water-repellent crust). Particularly good for acid-loving plants like tomatoes, blueberries, and azaleas. Most coffee shops will give you used grounds for free.
3. Banana Peel Fertiliser
Banana peels are rich in potassium — essential for flowering and fruiting. Dry peels in the oven at low temperature, grind them, and mix into the top layer of compost. Alternatively, soak fresh peels in water for 48 hours and use the water to feed plants.
4. Eggshell Calcium
Eggshells are 95% calcium carbonate — essential for cell wall development and preventing blossom end rot in tomatoes. Crush dried shells finely and work into the soil around plants, or steep in water overnight and use as a liquid feed.
5. Nettle Feed
Stinging nettles make one of the most potent organic liquid fertilisers — high in nitrogen, iron, and trace minerals. Fill a bucket with nettles, cover with water, leave for 2–4 weeks (it will smell terrible), dilute 1:10 with water and feed your plants. Use gloves when handling fresh nettles.