Nutrient additives are the plant feeds that indoor growers will mainly use to keep their cannabis plants healthy. You can buy from your local garden center and they will often either come in a powder form or liquid concentrate, both requiring you to mix in extra water yourself – never apply either directly to your cannabis without diluting them first!

It is also possible to get it pre-mixed plant food that is ready to apply straight to your plants, but this is often more expensive than the other options - as you are paying for someone to have already added the water and ship it to your area. Don't be fooled by the higher price, the ready mixed stuff is no better than nutrients you mix yourself. You will also find that most cannabis plants are quite sensitive to over feeding compared to other plants, so pre-mixed is likely to be too strong anyway.

Generally speaking, if you are an indoor cannabis grower then you will use these additives as a food source for your marijuana. They will help you maintain replace the used up nutrients within your grow medium without the risk of introducing any foreign bodies that you may get when using more natural means. Plant feed should be used on a regular schedule, used in conjunction with watering the plant. It is worth noting that most shop bought plant feed is not made with cannabis in mind; as a result, using the manufacture's instructions can often result in a feed that is too strong. Unless you know your strain very well, you will want to keep an eye on your cannabis plants for any tell tale signs of over or underfeeding and be prepared to adjust your nutritional feed accordingly. For more information on basic feed schedules and adjusting plant food dosage for cannabis plants, see our article on Feeding Your Cannabis.