Complete combo kits for making 5 gallon batches of Jack's 321 hydroponic nutrient solution. Each kit includes accurately weighed, individually bagged components: 18.0 grams of Jack's 5-12-26 water-soluble hydroponic fertilizer including micro-nutrients, 12.0 grams Calcium Nitrate 15.5-0-0, and 6.0 g Epsom Salt (magnesium sulfate). The 18 g / 12 g / 6 g amounts are selected to make 5 gallons of the standard, classic Jack's 321 nutrient recipe so you don’t need a scale and you won’t have to spend time weighing out the components yourself (you will need a 5 gallon bucket to mix the nutrient solution in). Important: Do not mix the 3 components together at the same; dissolve the Jack's Hydro 5-12-26 first, then the Epsom Salt, and lastly the Calcium Nitrate. For orders that are not fulfilled by , the kits will be mailed using USPS First Class package service which typically arrives in 1-3 business days and include package tracking.
Trustpilot
3 days ago
1 day ago