Stinging nettles, often seen as a nuisance weed, can be transformed into a powerful homemade fertiliser that makes tomato plants grow faster and produce tastier fruit. Gardeners and experts alike recommend this natural, cost-free alternative to shop-bought tomato feeds.
How to Make Nettle Fertiliser
Iwona Orlikowska shared her grandmother's method on the Gardening UK Facebook page, posting a photo of stinging nettles steeping in water. She wrote: "Has anyone tried the nettle fertiliser, especially for tomato plants? My granny used to do that, and her tomatoes would grow like crazy and always taste incredible. I'm doing it myself for the first time. Any experience with it?"
Orlikowska explained the process: "Basically, ferment the nettles for two to three weeks and dilute them one to 10 parts with fresh water when using them on the tomato plants. My granny shredded the nettle. She said it was very important."
Why Nettle Tea Works
Gardening specialist Benedict Vanheems of Grow Veg describes nettles as a "powerhouse plant food." He said: "Put the nutrients found within nettles to good use by making your own natural, organic liquid plant feed. They're full of growth-boosting goodness, including nitrogen, calcium and magnesium."
To harness these benefits, snip nettles and place them in a watertight container with a lid. Weigh them down, add water, and steep for roughly a month. When ready, dilute one part nettle tea with ten parts water before applying to tomato plants.
Application and Precautions
Nettle tea is potent and must be diluted before use. Apply it to tomato plants as a liquid fertiliser every one to two months, but no more frequently than every three weeks. The quantity depends on plant size.
Gardeners in the Facebook group shared their experiences. Robin Biddlecombe wrote: "I make a similar brew with nettle, yarrow and comfrey, I use mine all round the garden with a similar dilution. Smells a bit though." Bernice Hodges said: "I have used it, but it smells! Monty Don uses it, and that is where I first saw it." Olive Turpin commented: "I found a tub behind the shed I did three years ago. It doesn't smell now, I'm glad I forgot about it. Looks good and started using it."
A Natural Alternative
While shop-bought tomato feeds are readily available, this homemade alternative is natural, effective, and free. Stinging nettles are rich in nitrogen, calcium, and magnesium, making them an excellent organic fertiliser. By repurposing this common garden scrap, gardeners can boost tomato growth and flavor without chemical additives.
