How to Prevent Nutrient Deficiency in Plants with Automation


Nutrient Deficiency

Preventing Nutrient Deficiency In Greenhouse Plants with Automation

Nutrient deficiency in plants can trickle down quickly to your bottom line, resulting in lost crops, lower yields, and wasted resources. You know that nutrient dosing starts with water—and if your water isn't prime for your grow operation, all the nutrient dosing in the world won't be able to produce high-quality yields. However, ensuring the right nutrients are delivered at the right time can make or break your grow operation.


Here is how you can prevent nutrient deficiency in plants through intelligent automation:

Nutrient Deficiency 101

Although growers might assume the most troublesome plant problems are caused by disease or pests, disease and bugs are easily controlled with indoor grow operations. With greenhouse operations, ensuring the right mix of nutrients are delivered at the right time is often one of the hardest variables to tackle, but nutrient quality is crucial to ensuring plants remain healthy and viable. Deficiencies can manifest in the form of plant discoloration, stunting, and distortion and are the result of several factors, including:

  • Soil that is overly compacted and hinders root growth
  • Soil that is too wet and has poor drainage
  • Too much fertilizer, which can cause salt injury
  • Soil with pH levels that are too acidic or too alkaline
  • Poor levels of macronutrients (e.g., potassium, calcium, sulfur, magnesium, nitrogen) or micronutrients (e.g., copper, boron, zinc, iron, manganese)

The answer to having to manage nutrient dosing manually by regularly taking soil samples and constantly checking pH levels to avoid all of these deficiencies? Intelligent, automated nutrient dosing.  

Automating Nutrient Dosing

Auto-dosing systems manage your grow operation by measuring pH, water temperature, and electrical conductivity (EC) levels and automatically adding in different nutrient mixes in order to adjust pH and EC levels to optimum levels. Monitoring EC is vital, because the amount of salts in the system correlates directly to the level of nutrients dissolved in the water.

There are a few requirements for proper nutrient dosing, including:

  • Equipment: You need a dosing system that dissolves or dilutes fertilizer concentrates to their proper feed strength and a means of getting those nutrients into the irrigation system.
  • Application: You need to have a way to uniformly and consistently deliver feed solutions to the root zone throughout the crop.
  • Consistency: Having the best equipment and means of application is useless unless you also have a consistent and repeatable method for dissolving/diluting fertilizer concentrates.

Types of Nutrient Dosing

There are two main dosing methods used in grow operations: dilute tanks and in-line injection. Although dilute tanks offer the simplest form of nutrient dosing, these systems are costly and only one formulation/concentration is available at any given time unless you invest in multiple large tanks. Because fertilizers are premixed and stored in a tank until needed, if you need to adjust the formulation/concentration, you must wait until the tank needs to be refilled, which can waste precious resources.

In-line injection offers more flexibility and customization, and is the most popular form of nutrient delivery. These systems work by continuously “injecting” concentrated stock solutions into the water stream as irrigation takes place. Depending on the injector’s design, mixing often occurs downstream in the irrigation system or in a mixing tank. In an automated in-line injection system, the amount of nutrients delivered will vary based on flow rates and/or sensor feedback on EC and pH levels. One of the biggest benefits of an automated in-line injection system is that the system can automatically turn on a dime to alter the solution to adjust feed recipes, change nutrient concentration for varied crops, or alter feed strength as the day goes on.

The Benefits of Automation

The benefits of implementing a smart automated dosing system are endless. The most obvious benefit is not having to manually assess whether your crops are getting the right nutrients at the right time. This will allow you to optimize labor by saving hours daily that it would take to manually dose—multiply that time by the wages you’re paying a systems manager, and the savings add up quickly. In addition to saving on labor costs, you’ll also remove human error from the equation. A few other reasons you might want to take advantage of an auto-dosing system include:

  • You need to adjust or change pH regularly because of crop needs
  • You need to adjust or change pH regularly because of fluctuating types of water used
  • You need to closely monitor and/or record nutrient dosing information in order to create optimal growing environments for specific crops
  • You need to protect against crop shock occurrences
  • You want to avoid crop loss and boost yields by working smarter, not harder

Automated dosing systems are great for large and small operations, especially because smaller systems often experience greater nutrient level fluctuations than larger systems.

The Right Dosing System

The Growlink Smart Dosing System is a multi-feed injector system that offers a management solution for pressurized in-line injection and dilute tank applications. This nutrient dosing system includes probes that measures pH, temperature, tank water levels, and EC, giving you the power to program the values you want your system to maintain to keep your operation in perfect balance 24/7/365. Download our Next Level Grow e-book now to find out how you can efficiently battle nutrient deficiency in plants and change your growing game.

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