It usually ends up in the bin, but this piece of rubbish could make your houseplants thrive

The secret to thriving indoor plants could be contained in the very thing you use to make your morning coffee.

Violet Witchel has been using the leftover remnants in her coffee pods to make a DIY fertiliser for some time now resulting in her tiny plants becoming lush green beauties.

She explained how she uses the coffee pod container to make the liquid gold in a video on her TikTok channel.

Watch the video above.

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"I am an exceptional plant mother, like, my plants absolutely thrive and I've raised most of them from babies," she said while showing off her plant collection.

"This is my trick I've been doing lately that has been making them grow like crazy. So I basically take my used Nespresso pods, which are pretty much just coffee grounds and I cut out the little cover thing – this is also super sustainable too.

"Then I'm gonna rinse the contents of the pod out into a little container, sometimes it gets stuck to the edges so you have to scoop it out with like a fork or something and you should get this nasty coffee slurry."

Once Witchel has made the budget-friendly fertiliser she simply waters her plants with it once a week.

The reason coffee is considered a good fertiliser for plants is because of the nitrogen content in it. However, not all plants need a nitrogen boost or respond well to the coffee so research the specific plants you want to use it on before trying this hack.

Once you've emptied the remaining coffee from the pods try recycle them by returning it to a Nespresso store or post it to Nespresso. If it's another branded pod, look online to see if there is a recycling program you can access, as pods can't typically go in yellow recycling bins.

For those who don't drink coffee but are looking for a budget-friendly, DIY fertiliser you can try using the water you rinse your rice in.

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Urban gardener Derek Vincent uses this hack in his garden to boost the growth of his vegie plants.

"Whenever I make rice I always rinse it several times and save the rinsing water for my garden. It has trace amounts of nitrogen, potassium and phosphorous, but it's loaded with starch which can help feed the microbial load in your soil, which helps make soil nutrients available to your plants," he said.