pH Scale
Marijuana pH levels are very important if you want to grow good weed. 6.7-6.2 is ideal, and will ensure that there’s no nutrient build up in the soil. Buy a pH meter. They are only about $10, and will make a huge difference in the quality of your bud. Monitor pH levels closely, and don’t let them get out of hand. If the pH is too acidic, potash or lime can be added to lower it a bit. If it’s too basic, phosphoric acid can be used. If your medium is neutral, small amounts of vinegar can be used to get the pH to 7-6.5 or so. Most fertilizers affect pH as well. Generally, fertilizers will make the pH more acidic.
Marijuana pH; Nutrient Chart
Generally as time goes on, more and more salts will build up in your soil. As the salts build up, the soil will become more acidic, and if it gets out of hand it can stunt the plants growth. A good sign of this is foliage that is browning. If you notice your plants aren’t as green as they should be, flush the soil with pure water. Also, begin leaf feeding your plants once they’re about a month and a half old. It’s pretty easy to leaf feed – just dissolve the food in water and spray it directly on the foliage. You can do all leaf feeding or a mixture of leaf and soil feeding – just be sure to not over fertilize.
