Spirulina, a blue-green algae packed with nutrients, can be cultivated at home with relative ease. Growing your own spirulina is a cost-effective way to obtain this superfood and ensures a fresh supply.
Growing spirulina at home is a rewarding process that offers sustainable, nutrient-rich food for yourself, your family and or aquatic pets.
Here’s a step-by-step guide on how to grow and harvest spirulina in a home setup.
Setting Up the Environment
First, gather the materials. You’ll need a clean, non-metal container or tank with a transparent cover, as spirulina requires light for photosynthesis. The container should ideally be 5-10 liters, especially for beginners. A glass or food-safe plastic container works well, but avoid metal, as it can react with the water and affect growth. Place the container where it can receive indirect sunlight for about 12 hours daily, or use a low-wattage aquarium light if natural light isn’t available.
Fill the container with water, ideally distilled or aged tap water.
To purchase a spirulina starter culture click here.
Adding Nutrients
Spirulina requires nutrients to thrive. We supply a pre-mixed spirulina nutrient pack that simplifies the process. Add the nutrients mix to the water and mix well, the required concentration is stated on the nutrients pack.
Next add the Spirulina starter culture to the solution and stir gently.
Keep the solution temperature between 30-35°C (86-95°F) for optimal growth. We recommend using an aquarium heater in tank.
Within a week or two, you should notice a thick green mass forming in the water.
Harvesting Spirulina
When the water turns deep dark green, your spirulina is ready to harvest. Use a fine mesh or cheese cloth to strain out the spirulina. Pour it through the filter, allowing the water to drain back into the container, and rinse it with distilled water to remove residual nutrients as they will affect the taste.
Storing and Consuming Spirulina
Once filtered, your fresh spirulina can be consumed immediately or stored in the refrigerator for up to a week. It has a mild flavor, making it a perfect addition to smoothies, salads, or drinks. If you prefer, you can also dry spirulina to make powder by spreading it thinly on a tray and allowing it to dehydrate, then grinding it finely.