Progrow Cocopeat can be used for at least 4 crop cycles.
We recommend that you sterilize the cocopeat between crop cycles by using a mixture of Hydrogen Peroxide and water – we recommend using 2ml of 35% food grade hydrogen peroxide per liter of water. Immediately after preparing the mixture, the cocopeat should be soaked in the medium for at least 4 hours. After soaking it should be thoroughly rinsed with clean water.
If Hydrogen Peroxide is not available, you can also use a chlorine bleach. We recommend using a 5% bleach mixed with water – mix 1 kg of bleach for every five liters of water. Soak the cocopeat with the bleach solution for at least 4 hours (overnight is best). After soaking it should be very well rinsed until the ‘bleach’ smell is completely gone. Some growers dislike using bleach because it can leave a slight residue. Plants can handle a certain amount of chlorine, and so long as it is very diluted, and the cocopeat is very well rinsed after sterilization.