Posted on

nutrients for growing weed indoors

What Are Plant Nutrients or Fertilizer?

Nutrition Basics

Plant nutrients or fertilizers mimic the natural amount of nutrients found in soil, often with some added benefits. Since growing cannabis indoors is becoming an industry standard, plant nutrients have evolved since most indoor grows use alternative substrates. To learn more about substrates, check out this article. Let’s examine the many nutrient options available.

These seventeen elements are required for healthy plants: carbon (C), hydrogen (H), oxygen (O), nitrogen (N), phosphorus (P), potassium (K), sulfur (S), magnesium (Mg), calcium (Ca), iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B), molybdenum (Mo), chlorine (Cl), nickel (Ni). There are some additional trace elements, but these are the must haves for your plant nutrients or fertilizer.

Nutrients for growing weed indoors

In other words, you want to use a “Vegetative” (high Nitrogen) or “general purpose” nutrient formula for the first stage of life known as the vegetative stage. If using high-quality soil, you can skip vegetative nutrients for the first 3-4 weeks while your plant uses up the nutrients in the soil, otherwise, you should start with vegetative nutrients around the time your plant opens its first leaves.

Why “K” for Potassium? The atomic symbol of Potassium is “K” from Neo-Latin kalium.

From a grower: “Canna is a Dutch company and one of the best IMO. They make a great product line for growing in coco coir and test their products on real cannabis plants.”

What’s the Best NPK Ratio for Cannabis Nutrients?

Recommended Organic Nutrients

General Hydroponics offers a simple duo with one bottle for the vegetative stage, and one bottle for the flowering stage called FloraNova Grow + Bloom. This nutrient system is cheap, simple, and easy with excellent results in soil/coco/hydro. The biggest issue I have with the duo is the liquid is so thick it can be annoying to measure out.

Phosphorus tends to increase the number of flowers, while Potassium helps increase the bulk/weight of flowers. Be careful, though because going overboard with either one can burn your plants!

Examples of Good Can nabis Nutrients

Don’t want to use nutrients at all? Learn how to compost your own super soil (or buy super soil pre-made online)! Super soil compost contains all the nutrients your plant will need from seed to harvest so you just need to add water. As an added bonus, with composted super soil you rarely need to worry about maintaining your pH. Instead, the composting process develops a colony of microorganisms in your soil that will automatically take care of the pH for your plants to an extent (like in nature), while slowly providing nutrients on demand.

The abundance of cannabis nutrient options can be overwhelming