LARGE BUCKET: Yields 4-5 Gallons (or approx 17 Liters of Potting Soil or Seed Starting Mix
- Coconut coir: 1 regular brick.
- Organic Compost: 1 gallon or 4 quarts. Do not use
- Vermiculite: 1 gallon (4 quarts)
- Perlite: 1 gallon (4 quarts
- 5 gallon bucket or large tub / container
- Screen or old strainer
Want a great seed starting medium? Use this same recipe, and sift through a screen or old strainer to ensure the end result has a fine texture and no clumps.
Want less? For a small bucket (1 gallon or scant 4 Liters), use 1 quart (or a little less than a liter) of each of the ingredients that called for a gallon. Use 1/4 of the coconut coir brick. Easy!
About the Ingredients
- Coconut Coir: The husk fiber of the coconut is compressed into blocks or bricks. You add water and wait until it is absorbed by the coconut coir. One brick regular-sized brick should make about 8 quarts (2 gallons) of medium once soaked in one gallon of water. I have purchased bricks for as little as $2.50 each. Add one brick of coconut coir to the bucket and add one gallon of water. Wait until all the water is absorbed, about 10 minutes. Mix and break up any clumps. Warm water works faster than cold water. If you’re making a small batch, use 1/4 of the brick and 1 quart of water.
- Compost: Screen the compost first if making seed starting mix. Gently work the compost back n’ forth over the screen or strainer with a gloved hand.
- Vermiculite: Vermiculite is a silica and clay mineral that forms in sheets in nature. Bagged, it resembles mica in appearance and absorbs water, helping to prevent the container soil from drying out.
- Perlite: You’ve seen it in nursery pots, it’s white and pebbly. Perlite is a volcanic mineral that looks like small white rocks. It helps promote drainage. You need this, you really do.
Simple Instructions: Mix all ingredients together and add warm water to the bucket (a little at a time) to reach an all over moist condition. Whallah! That’s it.
What if I cannot find coconut coir? NO PROBLEM. Substitute 1 gallon of screened peat and make sure it is moistened with water before adding any other ingredients.
WORM CASTINGS (OPTIONAL): Add 1/2 gallon worm castings to the entire bucket after everything is mixed and mix again. Worm castings add minerals and do not contain harsh fertilizers.
Did you know that seedlings do not need fertilizer until the true leaves appear, which are actually the second set of leaves.