Are you 18 or older?

You must verify that you are 18 years or older
to enter this website, by agreeing to the terms and conditions

The Best Nutrients for Autoflowers in Soil: A Grower’s Handbook

A mix of soil with the best nutrients for autoflowers

Autoflowering cannabis plants have become increasingly popular in recent years due to their shorter growth cycle and ease of cultivation. These plants can flower automatically, regardless of the light cycle, making them an excellent option for indoor and outdoor growers. However, like all plants, autoflowers require the proper nutrients to thrive and reach their full potential. In this article, we will discuss the best nutrients for autoflowers grown in soil and how to fertilize these plants properly.

Best Nutrients for Autoflowers in soil

When it comes to fertilizing autoflowers in soil, it is essential to understand that these plants have different nutrient needs than their photoperiod counterparts. Autoflowers have a shorter life cycle and generally require lower levels of nutrients than photoperiod plants. This is because autoflowers are adapted to grow in environments with limited resources. These plants can easily be overwhelmed by too much nutrient uptake.

Nitrogen (NA)

One of the key nutrients that autoflowers need is nitrogen (N). Nitrogen is an essential element for healthy plant growth and is responsible for developing leaves, stems, and branches. However, it is important not to over-fertilize with nitrogen. It can lead to excess foliage growth at the expense of flower development. A good rule of thumb is to aim for a balanced fertilization program that provides adequate nitrogen levels without going overboard.

Phosphorus (P) and Potassium (K)

In addition to nitrogen, autoflowers also need phosphorous (P) and potassium (K) to thrive. Phosphorous is essential for the development of strong roots and healthy flowers. At the same time, potassium is necessary for proper plant metabolism and the regulation of water and nutrients. Both of these nutrients are important for overall plant health. You should include them in any fertilization program for autoflowers in soil.

Magnesium (Mg)

Another key nutrient for autoflowers is magnesium (Mg). Magnesium is an essential component of the chlorophyll molecule. It is responsible for photosynthesis, the process by which plants convert light energy into chemical energy. Without sufficient magnesium, autoflowers may experience yellowing leaves and poor growth.

Calcium (Ca)

Calcium (Ca) is also an important nutrient for autoflowers in soil. It plays a vital role in plant cell wall structure and is necessary for proper root development. It is also crucial for the transport of other nutrients throughout the plant.

Iron (Fe), Zinc (Zn), Copper (Cu)

In addition to these macronutrients, autoflowers also require trace amounts of micronutrients such as iron (Fe), zinc (Zn), and copper (Cu). These nutrients are needed in small quantities but are still essential for proper plant growth and development.

How to choose the best nutrients for Autoflowers?

Many commercial fertilizers are available on the market specifically formulated for autoflowers and can be used throughout the entire growth cycle. So, how do you ensure that your autoflowers are getting the nutrients they need? One option is to use a high-quality, all-purpose fertilization program that includes a balanced mix of all the necessary nutrients.

Another option is to use a fertilization program that is tailored to the specific needs of your autoflowers. This may involve using different fertilizers at different stages of the growth cycle or using fertilizers that are rich in specific nutrients. For example, if your autoflowers are showing signs of nitrogen deficiency (such as yellowing leaves), you may want to use a high-nitrogen fertilizer to boost plant health.

Recipe for the best organic fertilizer for Autoflowers in soil

Here is a recipe for an organic fertilizer that you can use for your autoflowers grown in soil.


  • 1 part bone meal
  • 1 part kelp meal
  • 1 part blood meal
  • 1 part wood ash (optional)


  1. Mix all of the ingredients together in a large bucket or container.
  2. Apply the fertilization to the soil around your autoflower plants, being sure to follow the recommended application rates on the packaging of each ingredient.
  3. Water the soil thoroughly to help the nutrients absorb into the soil.

This organic fertilization mix provides a balanced mix of nutrients for Autoflowers in soil, including nitrogen, phosphorous, and potassium, as well as trace amounts of micronutrients. The bone meal and blood meal provide phosphorous and nitrogen, respectively, while the kelp meal adds potassium and trace amounts of micronutrients. The wood ash, if included, provides additional potassium and helps to adjust the pH of the soil.

It is important to note that this fertilization mix should not be used as the sole source of nutrients for your autoflowers. It is best to use this mix in conjunction with a balanced fertilization program to ensure that your plants are getting all the nutrients they need. Additionally, be sure to follow the recommended application rates for each ingredient to avoid over-fertilizing your plants.


In conclusion, providing your autoflower plants with the right nutrients is essential for healthy growth and development. By using a high-quality fertilization program that includes a balanced mix of nutrients, you can ensure that your plants have everything they need to thrive. Consider checking out the selection of Autoflower strains available in our shop. With a wide range of products to choose from, you are sure to find something that meets your needs.

Related Post

10% OFF
Give us your email and snag 10% off. If you're tempted to use a fake one, just send over your friend's who smokes a lot. We all win! 🌿💨