Compost Tea Ingredient Kit

Compost Tea Ingredient Kit

Everything you need to brew 250L of actively aerated compost tea (AACT)—designed to feed soil biology and support healthy, vigorous plant growth. This curated ingredient kit promotes a diverse community of microbes and helps unlock nutrients in living soil systems. Suitable for use in both veg and bloom stages, and excellent for houseplants, vegetable starts, flowers, raised beds, and gardens of all kinds.

If you really want to see the wow factor in your houseplants—or any plants you're growing—start brewing compost tea! It truly is something special. A well-brewed tea delivers a burst of living microbes that invigorate the soil and wake up your plants in a way few other inputs can. You'll notice bigger leaves, stronger stems, and fresh new growth shortly after application. It's not uncommon to see your plants standing taller, leaves reaching higher, and overall looking noticeably happier within hours. If you’ve never tried it, give it a go—you’ll be amazed at the difference it makes.

Includes:

• 1 x 16L Optimize Organics Compost & Castings Blend

• 1 x 1kg Microbe Multiplier

• 1 x 500ml Wild Fish Hydrolysate

• 1 x 500ml Unsulphured Blackstrap Molasses

Why Use This Kit?

• Provides the essential ingredients for brewing microbe-rich compost tea

• Designed to support both bacterial and fungal populations for balanced biology

• Helps improve nutrient cycling, root development, and plant vitality

• Safe to apply weekly—even up to the final week of harvest

How to Brew Your Compost Tea

Start by filling your bucket or barrel with clean, unchlorinated water. The water should be room temperature—not too cold or hot. Let it sit overnight if needed, or bring it up to temp with a small amount of boiling water.

1. Prepare the Brew Bag
   Place 4 cups (1 L) of Optimize Organics Compost & Castings Blend and ¼ cup (60 ml) of Microbe Multiplier into your mesh tea bag. Zip shut and submerge into the water. Gently massage the bag to get water evenly throughout the contents, helping microbes disperse and begin activating.

2. Dissolve the Molasses
   In a small container, mix 1 tsp (5 ml) of Unsulphured Blackstrap Molasses into warm water until fully dissolved. Pour into the brew.

3. Add the Fish Hydrolysate
   Stir in 1 tbsp (15 ml) of Wild Fish Hydrolysate.

4. Start Aeration
   Add a bubbler or air stone connected to a sufficiently sized air pump for your brew volume. Keep the air running constantly for 24–36 hours. In cooler rooms, allow up to 48 hours to fully develop microbial populations.

5. Use Promptly for Best Results
   Compost tea is best used immediately after brewing, while microbial life is most active. You have a 6-12 hour window to apply after the brew is done. After that, microbial die-off increases quickly, and the tea loses its effectiveness. Always keep aerating until use.

6. 🔬 Optimize Your Brew with a Microscope
   Want to take your compost tea to the next level? Using a simple microscope allows you to monitor microbial activity and pinpoint when your brew reaches peak biology—so you can apply it at just the right time for maximum benefit.