Autoflowering cannabis is known for being easier to grow than photoperiod varieties, but it still needs the right combination of nutrients to thrive. It’s also critical to know how many nutes to use and when.

What Nutrients Should I Use for Autoflowering Cannabis?

The three most important macronutrients for growing cannabis, including vegetative growth, are nitrogen (N), phosphorus (P), and potassium (K). Most fertilizers are labeled with an N-P-K ratio showing how much of these nutrients they contain. The ideal N-P-K ratio varies depending on the growth period:

  • Seedling phase: 2-1-2
  • Vegetative stage: 10-5-5
  • Flowering stage: 5-15-10 or 5-10-10

As you can see, cannabis plants need more nitrogen (N) and potassium (K) in the seedling phase, plenty of nitrogen for vegetative growth, and large quantities of phosphorus (P) for flower production.

Calcium, magnesium, and sulfur are also essential, along with trace amounts of micronutrients like copper, zinc, and iron. These are usually included in commercial fertilizers that have the three major macronutrients.

There are some nutrients designed specifically for autos, but you can also use nutes intended for photoperiod cannabis. Just make sure to avoid feeding your plants large quantities of fertilizer. Autoflowers only need one-eighth to one-half of the nutes that photos require, so we recommend starting with a low dose and increasing the strength if needed.

Best Organic Nutrients for Autoflowers

Organic nutes enrich the growing medium by breaking down existing nutrients so they can be easily absorbed. Many growers also believe they result in a better-tasting smoke.

Green Buzz Liquids, BiozBizz, and B.A.C. are some of our favorite organic nutes. Natural organic fertilizers such as manure, bat guano, and compost tea are also helpful.

Best Nutrients for Autoflowers in Soil

When growing in soil, you can start your autos off right by making or buying Super Soil