Compost tea is a powerful liquid fertiliser made by soaking compost in water. It delivers nutrients and beneficial microbes straight to your plants. This compost tea recipe shows you how to make it easily at home using simple ingredients.
It’s cheap, organic and brilliant for vegetable gardens, houseplants and flower beds.
What Is Compost Tea?
Compost tea is a nutrient-rich liquid created by steeping compost in water. The liquid extracts:
- Beneficial bacteria
- Fungi
- Trace minerals
- Plant-boosting nutrients
It helps improve soil health and plant growth naturally.
Benefits of Compost Tea
- Boosts plant growth
- Improves soil structure
- Strengthens root systems
- Helps fight disease
- Increases nutrient absorption
Think of it as a probiotic drink for your garden.
What You’ll Need
- Bucket (10–20 litres)
- Finished compost or worm castings
- Non-chlorinated water
- Old pillowcase or cloth
- Stick or spoon for stirring
Worm castings work brilliantly.
Learn more about worms here:
DIY worm farm setup
Simple Compost Tea Recipe
- Fill bucket with water
- Leave for 12 hours (to remove chlorine)
- Add 2 cups of compost
- Stir well
- Let steep for 12–24 hours
Stir occasionally to oxygenate.
Optional Boosters
To supercharge your tea, add:
- 1 tbsp molasses or honey
- Seaweed extract
- Fish emulsion
These feed beneficial microbes.
How to Use Compost Tea
Soil Drench
- Pour directly onto soil
- Water around plant roots
Foliar Spray
- Strain tea
- Use spray bottle
- Spray leaves in morning
Avoid spraying in hot sun.
How Often Should You Use It?
- Vegetables – every 2 weeks
- Houseplants – monthly
- Flowers – every 3 weeks
Less is more.
Using Worm Castings
Worm castings make exceptional tea.
Feeding guide:
How much should I feed my worms?
Harvesting tips:
Ways to sift worms from castings
Common Mistakes
- Using chlorinated water
- Steeping too long
- Using unfinished compost
- Storing tea
Always use fresh.
How to Tell If It’s Working
- Healthier leaves
- Stronger growth
- Darker green colour
Final Thoughts
This compost tea recipe is one of the easiest ways to supercharge your garden naturally.
With just water and compost, you can give your plants a powerful organic boost.
FAQ
Can I store compost tea?
No – use within 24 hours.
Can I use it on seedlings?
Yes – dilute first.
Does it smell?
It should smell earthy, not rotten.
