How to Make Your Own Organic Fertiliser for a Thriving Vegetable Garden

Looking to boost your vegetable patch the natural way? Whether you're growing spuds in Galway, carrots in Castlebar, or kale in Roscommon, making your own organic fertiliser in Ireland is a cost-effective, eco-friendly solution that keeps your garden, and the environment, thriving. And you don't even need to find a local garden centre to do it!

Why Organic Fertiliser?

In our temperate climate, healthy soil is your greatest asset. Organic fertiliser improves soil structure, retains moisture, and supports biodiversity. Unlike synthetic alternatives, it feeds your plants and your soil.

Easy Organic Fertiliser Recipes You Can Make at Home

1. Compost Tea. Steep a shovel of mature compost in a bucket of rainwater for 2–3 days. Stir occasionally, strain, and pour around the base of plants for a nutrient-rich boost.

2. Seaweed Soak (Perfect for Coastal Growers)

   Rinse collected seaweed of sand and salt, soak in water for a week, then use the liquid to feed your garden. Seaweed is rich in potassium and micro-nutrients.

3. Nettle Brew Fill a bucket with fresh nettles, cover with water, and leave to ferment for 1–2 weeks. This nitrogen-rich feed promotes leafy growth, ideal for brassicas and greens.

   
   

Local, Sustainable, Smart

Making your own fertiliser supports soil health, climate action, and the circular economy, all from your back garden. By using materials you already have you're saving money and closing the loop in your garden.

Final Tip

Don’t overdo it. Organic fertiliser is slow-release, meaning a little goes a long way. Test different mixes to see what your soil responds to best. If possible mulch any bare soil with autumn leaves to retain the nutrients.