Mushrooms are a highly nutritious fungus that are easy to grow, offering an economical and nutrient-dense food source. Growing mushrooms from coffee grounds is a great way to recycle old grounds, while producing edible and nutritious mushrooms at home. You can collect grounds at home or ask a local coffee shop if you can take some off their hands.
What You Will Need:
Drill with ½-inch drill bit
Used coffee grounds (enough to fill the bucket halfway)
Mushroom spores in sawdust (enough for 5 gallons)
Plastic wrap or recycled plastic bag
Step 1: Gather the coffee grounds. If you are not an avid coffee drinker, stop by a local coffee shop and ask if they would be willing to donate some grounds. Be sure to store the grounds in the freezer until they are ready for use.
Step 2: Drill holes around the bottom exterior of a 5-gallon bucket to allow for drainage. The holes should be about ½ -inch thick.
Step 3: Drill holes around the top exterior of the bucket to allow for carbon dioxide to escape.
Step 4: Place two layers of shredded newspaper at the bottom of the bucket, covering the holes, to prevent the coffee grounds from spilling out.
Step 5: Fill the bucket halfway with coffee grounds, and wet the coffee grounds so they are consistently moist throughout. The coffee grounds should be moist but not fully saturated.
Step 6: Using your fingers, break up the mushroom spores a bit and mix them up with the coffee grounds. The spores should be mixed into the top inch of coffee grounds. Compress the grounds with your hands gently.
Step 7: Cover the bucket with plastic wrap or a clear plastic bag. Puncture small holes throughout the plastic to allow for ventilation. The plastic can be removed as soon as the mushrooms begin to grow.
Step 8: Using your spray bottle, mist the mushrooms twice a day so that the soil maintains consistent moisture.
Step 9: Sit back and watch the mushrooms grow! The first mushrooms should be ready to harvest within a couple of weeks.