apple trees in orchid

How to Test the BRIX Level of Fruit Trees Vegetables and How Raising BRIX Level Helps

Why is The BRIX Level Important in Fruit Trees and Plants

BRIX level, a measure of the sugar content in an aqueous solution, is a critical factor in assessing the quality and health of fruit trees. This article will guide you on how to test the BRIX level of fruit trees using a refractometer and press, and explain the benefits of raising the BRIX level.

What is BRIX?

BRIX, expressed in degrees (% Brix), is the weight of dissolved sugar as a percentage of the weight of the entire solution. It's often used in the food and beverage industry to measure the amount of sugar in fruits, vegetables, juices, wine, and honey. A high BRIX reading indicates a higher sugar content, which generally translates to better taste and higher nutrient content.

The Role of BRIX in Plants and Our Environment

BRIX is a measure of the sugar content in an aqueous solution. In horticulture, BRIX levels are used to gauge the health and quality of plants, particularly fruit-bearing trees. But beyond indicating the sweetness of a fruit or the quality of a plant, what does BRIX do for plants and our environment? Here's an exploration of its role.

BRIX and Plant Health

BRIX is a direct indicator of the overall health and vitality of a plant. A high BRIX reading often signals a nutrient-dense plant that's likely healthier and more resilient than a plant with a low BRIX reading. This is because a high BRIX level reflects a high concentration of sugars and minerals, which indicates that the plant has a well-functioning photosynthesis process and nutrient uptake system.

Plants with high BRIX levels are generally more resistant to pests and diseases. Pests are typically attracted to weak plants with low sugar and mineral content.  High BRIX levels in plants can put pressure on insects, and potentially deter them, partially because the high density of the plant becomes too rich for the insects to digest 


  1. Nutrient Density: BRIX is a measure of the sugar content in an aqueous solution, and high BRIX levels often indicate a high nutrient density in plants. This nutrient density can make it more difficult for insects to digest the plant material. Essentially, the plant becomes too rich for the insect's digestive system, causing them discomfort or harm.

  2. Plant Health: High BRIX levels are usually a sign of a healthy plant. Healthy plants have stronger cell walls which are harder for insects to penetrate. They also have higher levels of beneficial microorganisms and enzymes, which can act as natural insect repellents.

  3. Sugar Concentration: The high sugar concentration associated with high BRIX levels can dehydrate insects. When an insect feeds on a high BRIX plant, the osmotic pressure caused by the high sugar concentration can draw water out of the insect's body, leading to dehydration.

Remember, there are many factors that can influence a plant's attractiveness to pests, and BRIX is just one of them. Other factors such as plant species, plant age, and environmental conditions can also play a role.

 On the other hand, plants with high BRIX levels produce complex carbohydrates and compounds that many pests find unattractive or indigestible. Therefore, cultivating plants with high BRIX levels can reduce reliance on chemical pesticides, contributing to a healthier environment.


BRIX and Soil Health

Soil health is a critical factor influencing the BRIX level of plants. Nutrient-rich soil often leads to plants with high BRIX levels. Therefore, measuring the BRIX levels of plants can provide insight into soil health and fertility. If plants consistently show low BRIX readings, it may be an indication that the soil lacks certain essential nutrients, prompting necessary soil amendments. This way, BRIX measurements can guide sustainable soil management practices, contributing to environmental preservation.

BRIX and Food Quality

High BRIX levels in fruits and vegetables not only result in better taste but also signal higher nutritional content. This is beneficial for human health as nutrient-dense foods provide more vitamins, minerals, and antioxidants. Furthermore, high BRIX produce tends to have a longer shelf life and is less likely to rot quickly. This can reduce food waste, indirectly contributing to environmental conservation efforts.

BRIX and Sustainable Farming Practices

BRIX measurements are integral to several sustainable farming practices. For example, farmers aiming for organic certification or practicing biodynamic farming often use BRIX readings as a key metric for crop quality and soil health. These farming methods emphasize natural pest control, biodiversity, and soil conservation, all of which contribute to a healthier environment.

In summary, BRIX does more than just measure the sugar content in plants. It is a vital indicator of plant health, soil fertility, and food quality. By guiding sustainable farming practices and promoting the growth of healthier, more resilient plants, BRIX plays a significant role in environmental preservation. The use of BRIX measurements in agriculture encourages the production of nutrient-rich crops, reduces reliance on chemical pesticides, and supports sustainable soil management practices, all contributing to a healthier planet.

If you want to be able to test the BRIX level of your fruit trees, tomato plants, cannabis plants, or strawberries you will need the following:

Equipment Needed

  1. Refractometer: This handheld device measures the refraction of light in a liquid. It's used to determine the sugar content in a solution.
  2. Press or Juicer: To extract juice from the fruit for testing.
  3. Clean Container: For collecting the juice.
  4. Distilled Water: For cleaning the refractometer.
  5. Soft Cloth or Tissue: For wiping the refractometer.

Testing BRIX Level: Step-by-Step Guide

Step 1: Juice Extraction

Pick a ripe fruit from your tree. Cut it open and squeeze the juice into a clean container using a press or juicer.

Step 2: Preparing the Refractometerrefractometer

Before using the refractometer, it must be calibrated. Open the daylight plate and place a few drops of distilled water on the main prism assembly. Close the daylight plate so that the water spreads across the entire surface of the prism without air bubbles or dry spots. Look through the eyepiece towards a light source.

Step 3: Calibration

If the refractometer is correctly calibrated, the boundary line in the viewfinder should align with the '0' mark. If it doesn't, adjust the calibration screw until it does.  

Step 4: Measuring BRIX Level

Clean the prism assembly with a soft cloth or tissue. Place a few drops of the extracted juice on the prism assembly, then close the daylight plate. Look through the eyepiece towards a light source. The line of demarcation indicates the BRIX level.

The Significance of Raising BRIX Levels

Raising the BRIX levels in fruit trees has several benefits:

  1. Improved Taste and Quality: High BRIX fruits are generally sweeter, juicier, and have a more intense flavor profile.
  2. Better Shelf-life: High BRIX fruits tend to have longer shelf life and better resistance to rot.
  3. Pest Resistance: High BRIX plants are healthier and have shown better resistance to pests and diseases.
  4. Nutrient Density: High BRIX fruits have a higher concentration of nutrients compared to their low BRIX counterparts.

How to Increase BRIX Levels in Fruit Trees

  1. Soil Health: Healthy, well-balanced soil is essential for high BRIX levels. Ensure your soil has the right balance of minerals and organic matter.
  2. Proper Watering: Overwatering can dilute the sugar concentration in fruits, leading to lower BRIX levels. Water your fruit trees appropriately.
  3. Sunlight: Photosynthesis is critical for sugar production. Make sure your trees get ample sunlight.
  4. Pruning: Regular pruning helps to increase sunlight penetration and air circulation, which can boost BRIX levels.
  5. Right Fertilizers: Using fertilizers rich in potassium and phosphorus can help increase BRIX levels.

Using a Refractometer

To measure the Brix level in plants using a refractometer, you'll need to follow a few steps.

  1. First, extract juice from the plant material. This can be from fruits like apples or strawberries, or even from leaves. The amount of material required can vary, but as a guideline, enough leaves to give two to three droplets of liquid should be sufficient.  Some folks use a garlic press and some use a blender to get enough juice, I talked with one old timer that just uses a pair of pliers to squeeze enough juice from a leaf to get results. garlic press
  2. Next, apply the extracted juice onto the refractometer. The refractometer is designed to measure the "Brix" of plant material, which is a reflection of the nutrient density and sugar levels in the plant.  Refractometers can actually be obtained from Amazon for under $40.  A good garlic press may cost more.  Do not use a garlic press you have used for garlic, no matter how much you think you have cleaned it. 
  3. Once the juice is applied, you can read the Brix level from the refractometer. The refractometer measures degrees Brix, which is a measure of the dissolved solids and sugars produced during photosynthesis.

It's important to note that the Brix level can be influenced by various factors, including the quality of the soil and the overall health of the plant. Therefore, improving the Brix level in plants can result in a tastier harvest.

Remember, the refractometer is a valuable tool for understanding the health and quality of your plants, and can be used to guide your gardening practices.

Testing and increasing the BRIX level of fruit trees is an essential part of horticulture. It helps ensure your fruits are of high quality, taste better, and have a longer shelf life. Plus, it contributes to the overall health of your trees. So, invest in a good refractometer and start testing!


Raising the brix level in plants and trees can be achieved through several methods:

  1. Utilizing High-Quality Humic Substances: According to one resource I found, timely applications of high-quality humic substances can help increase Brix levels in plants. These substances can improve the soil's nutrient-holding capacity, thus enhancing the plant's ability to absorb essential minerals.
  2. Increasing Mineral Uptake: The Nature Life Project suggests that the key to increasing brix levels is to enhance the plant's mineral uptake, which subsequently allows the plant to produce more sugars.
  3. Using Foliar Sprays: One source mentioned that using foliar sprays can quickly increase Brix levels and reduce the total amount of fertilizer needed for your crop, whether it be fruit or vegetables, trees, etc.
  4. Adding Quality Carbohydrate Additives: You can also add a quality carbohydrate additive to the root zone of the plant to prevent the plant from secreting sugar out through their roots, which can reduce their own Brix level.
  5. Remineralizing and Balancing the Soil: If you remineralizer and balance the soil it can also have an effect to improve Brix levels. This process involves adding minerals back into the soil, thus improving its fertility and enhancing the plant's ability to absorb nutrients.

Please note that there is no one-size-fits-all solution to raising Brix levels. Each plant may require a different approach, so it's crucial to understand the specific needs of your plants and trees.

Raising BRIX the EASY WAY

IF you are looking for an easy way to increase the BRIX level in crops, fruit trees and plants….


We highly recommend that you add our BRIX BOOSTER ULTRA SWEETNER to our Rich & Gooey Soil Food to give your plants, fruit trees and vegetables the Boost they need for optimal health and growth. 

ultra sweet brix booster

Plants are mainly relying on carbohydrates and the more carbs you can give them the more production you will get out of the plant plus it helps microbes grow in the soil.

This product is Certified 100% Organic

Our dextrose powder is derived from pure cane molasses.

We use a cold process that turns it to powder. 

Cold process sugar processing, also known as cold refining, is a method that avoids the use of high temperatures to preserve the natural properties of the sugar. When it comes to pure cane molasses, this process can have some significant implications.  Molasses is a byproduct of the sugar-making process. After sugar cane is crushed and the juice is extracted, it's boiled to create crystals, which are removed to produce sugar. The remaining syrupy liquid is molasses.  In a cold process for producing molasses, the raw sugar cane is dissolved in a solution, filtered to remove impurities, and then the solution is cooled to form crystals. These crystals are separated from the liquid (molasses) through centrifugation. This process results in a purer, more nutritionally intact molasses. 

The advantage of this method is that it can help to preserve more of the nutrients that are naturally present in the sugar cane, such as vitamins and minerals. It also consumes less energy compared to traditional hot processes, making it more environmentally friendly.

 cane sugar molasses


Can dextrose be good for plants?

It dissolves quickly in a liquid, and is readily available as a food to living organism from humans to brewer's yeast beasties.  Plants use Dextrose to fuel photosynthesis with.

Why Shouldn't I Buy a Bag of Powdered Sugar?  It's Cheaper!

We often get asked, “why don’t I just go buy a bag of powdered sugar?” “It’s cheaper!”  Yes, you could, but your plants and grass would suffer as a result.  When unrefined powder sugar is introduced on plants or grass the plants draw it up into the plant wrongly drawing moisture out of the ground and they go into shock for days or weeks.  They will generally recover, but it will set back the growth and production of the plant, turf, flower, or vegetable.  Trust me, if the sugar people knew regular powdered sugar worked, they would put it on the shelf with a label claiming it was good for grass and plants!

Our Sweet Powder Concentrate is Certified which means it is guaranteed to be 100% organic, and we also have added Microbe’s into the mix to ensure a healthy food for plants that will raise the BRIX level in the plant and give it a boost of energy for growth and production.  Also, some sugars such as fructose and glucose are generally not derived from Cane, thus not as beneficial as ours.  I introduce our Growth Nutrients Ultra Sweet Powder into everything I spray.  It actually stabilizes nitrogen pellets and binds them to make them more effective.  While I sparingly use nitrogen, when feeding corn, milo, hemp, etc; some nitrogen is healthy as long as you use it along with other components. 

Covington Naturals Ultra Sweet Growth Nutrients Increases Plant Proteins, Vitamins and Minerals for a High Yield Boost in Growth 

  • Increasing BRIX levels boosts plant growth and reduces insect pressure
  • Just add water for increase in yield production
  • Compatible with other herbicide and fungicide treatments
  • Adds carbohydrates to fuel microbial activity
  • Affordable, just add 2-4 oz. per gallon of water
  • Proven to raise production by 15-20%
  • Available in 1 lb. or 20 lb. containers

 Covington Naturals Ultra Sweet Growth Nutrients can be combined with our rich and gooey soil food aerator to increase your crop’s yield and quality or can be used as a stand-alone additive. Just add water and watch the increase in the rate of photosynthesis, carbs, and minerals go to work to contribute to your plants or crops growth and strength.

rich and gooey soil foodpapa zeep with soil food and tomatospapa zeeps rich and gooey plant food