Soil Mix For Blueberries In Containers

The right time for planting blueberries is the spring or fall but it depends on the climate in which you are living. You should do some research before choosing the right variety for growing blueberries in containers according to your hardiness zone. 

The location for growing blueberries is very important.  you should select the right spot where your blueberry plants get ample sunlight. As we are talking about growing blueberries in containers then you should choose the right container so they can produce juicy treats for you. 

You choose the right container, the right location, the right variety of your blueberry plants. But how can we neglect the soil which is the growing medium of Blueberry plants? In this article, we are going to talk about the right soil mix for Blueberry in containers.  

Blueberry Soil Requirements

Full sun, well-drained, moist and acidic soil is needed for blueberry plants to thrive. Rich soil with well-aged compost will result in optimal performance of the plant. 

It is recommended that you can use balanced NPK fertilizer or an Ammonium Sulphate fertilizer once a year. The best time of using fertilizer is in the spring.

The pH of the soil is very important for the healthy growth of any plant. If you grow plants in the ground then you should test the soil so you will know what you should add to the soil according to the requirements of the plants.

You can use a soil test kit for checking the pH. The ideal pH for blueberries should be between 4.5 to 4.8. The pH of the soil affects the overall condition, especially the growth of roots. 

With the help of pH, you can determine the availability of some elements required for plant growth.  For example, if the pH of the soil is above 7 it means there is a deficiency of zinc and iron in the soil.  

If there is a deficiency of nitrogen and sulfur then the leaves of the plant will start turning yellow. The deficiency of nitrogen can be seen in older plants easily. 

You can easily understand the importance of pH in the soil by thinking of yourself in a swimming pool. If the water of the pool is too cold or too hot then you might get out of the pool. 

In the same way, If the pH of the soil is too high or too low then the roots will not grow there. If they are not comfortable then they will not get enough material for proper growth.

 In case of growing in the raised bed or container, you can maintain the fertility of the soil according to the needs of a plant. 

Soil For Blueberries In Container

As mentioned above, acidic soil is necessary for blueberry plants. It means the pH of the soil should be below 7 on the pH scale. 7 is the neutral point on the scale while alkaline soil scores above the 7 on the scale. 

The favorable acidic condition makes it possible for blueberry plants to use the essential nutrients according to their needs. 

For growing blueberry plants in the container, you can maintain the soil according to your needs. You should use acid potting soil mix for filling the container. You can also mix peat moss and potting soil in an equal ratio. 

You should not use the soil mix that has redwood sawdust. Avoid using garden soil for your blueberry plants because most of the time garden soil is not quite acidic enough.

You can also use fertilizers that can increase the acidity of the soil. The best time for adding a small amount of fertilizer to the soil is from early spring to late summer. 

You should read all the instructions on the label. These instructions will help you a lot, they will guide you when to add fertilizer to your plants. You can also ask the local nursery and get all the basic information for this purpose. 

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Amending Soil For Blueberries

Blueberries are a low maintenance plant but they are sensitive to excessive fertilizers so you should avoid the high dose of feeding. You can apply fertilizers two or three times a year and try to use an organic slow-release fertilizer. 

You can amend the soil of the container of the blueberries plants in different ways. Here we are going to share with you some ideas which will help you a lot. 


If you want to amend the soil for blueberry bushes then sulfur can be used as the best amendment for lowering the pH level of the soil. If you are planting your blueberries in a container. 

According to the size of the container, you can use a quantity of powdered sulfur it will help to reduce the pH by two points. 


The second method is breaking up the soil. For this purpose, you can till or dig the soil to 10 to 12 inches deep. After tilling you can use 3 to 4 inches of organic matter on the top.


Peat moss is the best amendment that you can use to lower the acidic level of the soil. It will also work great if you use it alone but the combination with peat humus, compost, and rotted leaves will give you the best results. If you make a combination of Peat Moss with oak leaves then it will work great.

How To Acidify Soil For Blueberries?

If you see your blueberry plants are not thriving well then you should check the soil. If the pH of the soil is too high it means your soil is alkaline. You should take simple steps to test the pH of the soil. 

A soil test should be done for improving the performance of blueberry plants.  After a soil test, you can make a strategy according to the needs of your plant. 

The pH of the soil for blueberry plants should be between 4 and 5. The best way of lowering the pH of the soil is by adding granular to the soil of the container. 

  • You can also add sulfur for this purpose.  But sulfur should be added to the soil 3 months before planting. In this way, sulfur will mix with the soil properly. 
  • Another simple and cheap way is adding used coffee grounds to the soil. It will reduce the pH of the soil organically. Add 4 to 6 inches or 10 to 15 cm of coffee grounds into the soil. 
  • You can also use sphagnum peat around the base of the plant once a year.
  • Another way of lowering the pH of the soil is by adding acidic fertilizers. The fertilizer that you are using for lowering the pH of the soil should contain ammonium nitrate, ammonium sulfate or sulfur coated urea. Such fertilizers are high acidic fertilizers.
  • When you decide to add fertilizers to the soil then you should add slow-release acid fertilizer. The roots of blueberry plants are very sensitive to fertilizer salt injury so you should avoid over-applying fertilizers. The best time for using slowly released acid fertilizer is 4 weeks after planting blueberry bushes. In the first year, you can also add a light layer of fertilizer in the following spring. You will find detailed instructions on the label of fertilizers which you are using.

Using Vinegar To Acidify Soil For Blueberries

Another easy way for lowering the pH of the soil is by adding vinegar. Vinegar is a liquid form of acetic acid that helps to increase the acidity of the soil. 

But you are thinking vinegar is a kitchen staple and how can you use it for gardening purposes? There are many benefits of vinegar such as cleaning your dirty sinks and sinks and even help to adjust to the pH of the soil. 

Vinegar has vitamins that are very helpful in the growth of the plant but it depends on the type of vinegar which you are using. You can commercially manufacture white vinegar but organically made vinegar is best for organic gardening.  

Make a solution of vinegar with water. Never use vinegar directly to the soil because it will cause root burn which is not good for your blueberry bushes. 

The following are steps of preparing vinegar solution and using it for acidifying in your blueberry plant’s soil.

  • Take 1 cup of vinegar for one gallon of water. It is recommended that you should use the right type of vinegar which enriches your soil without affecting your plant. 
  • The best vinegar for blueberry bushes is culinary vinegar like apple cider or white vinegar. Horticultural vinegar is not recommended for this purpose because this is an herbicide and can damage your blueberry plants.
  • Vinegar is a very effective way for balancing the pH level of the soil but use it in a small quantity with water.
  • It is very simple to make the solution of vinegar and water now your solution is ready for your Blueberry bushes.
  • Now pour the vinegar solution all over the plant until the surface of the soil is hydrated and the solution reaches the roots. This will make the soil acidic and the pH good for the blueberries for a good amount of time.
  • You can use this mixture once a week for better results. 
  • The other way of using this solution is using an injector for the distribution of the solution. The choice is yours which way you prefer.
  • You should keep in your mind whenever you make this solution, you should use it quickly.  
  • After applying the vinegar solution to your blueberry bushes, you should regularly check the pH of the soil. When you see the pH of the soil is below 5 then you should stop applying vinegar. Too much acidic soil is also harmful to your blueberry plants.

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