How to Grow Microgreens in a Jar: Boost Your Indoor Garden with this Simple Technique

Day 6. Growing organic sprouts in a mason jar | Arina P Habich

Microgreens have become increasingly popular in recent years, thanks to their diverse range of flavors, textures, and vibrant colors. They are young vegetable greens, harvested at the early stages of growth – typically when the first true leaves have developed. Microgreens are packed with nutrients, making them an excellent addition to salads, sandwiches, or as a garnish for various dishes.

These tiny plants are not only attractive and nutritious, but they are also relatively easy to grow, making them a popular choice for home gardeners. With just a small space and a few simple materials, anyone can try their hand at cultivating microgreens. An increasingly popular method of growing microgreens is in a jar, which offers a number of advantages compared to traditional soil-based methods, as will be discussed in this article.

In addition, growing microgreens in a jar is an excellent way to introduce gardening to children and beginners, as it offers a simple, low-maintenance, and rewarding experience. This article will provide a comprehensive guide on how to grow microgreens in a jar, including the materials needed, step-by-step instructions, tips for choosing the best microgreens for jar cultivation, caring for your jar-grown microgreens, and troubleshooting common issues.

Why Grow Microgreens in a Jar?

There are several reasons why growing microgreens in a jar is an excellent choice for anyone looking to boost their indoor garden. First and foremost, growing microgreens in a jar is a space-saving method, making it perfect for those with limited room to grow plants. Jars can easily be placed on windowsills, countertops, or other small spaces, allowing for multiple jars to be cultivated simultaneously without taking up much room.

Another advantage of growing microgreens in a jar is the ease of maintenance. Jars create a controlled environment for the microgreens, reducing the risk of pests and diseases. Additionally, growing microgreens in a jar eliminates the need for soil, making the process cleaner and less messy.

Finally, growing microgreens in a jar is an eco-friendly option, as it promotes the reuse of glass jars that may have otherwise been discarded. With the increasing awareness of the importance of sustainability, this method of cultivation aligns with the values of environmentally conscious individuals.

Materials Needed for Growing Microgreens in a Jar

Before diving into how to grow microgreens in a jar, it’s essential to gather the necessary materials. Here is a list of items required for this method of cultivation:

  1. Glass jars: Choose wide-mouth jars that are clean and free from cracks or chips. Mason jars, pickle jars, or other food storage jars work well for this purpose. The size of the jar will determine the quantity of microgreens that can be grown.
  2. Seeds: Select high-quality microgreen seeds from a reputable supplier. There is a wide variety of microgreens to choose from, each with its unique flavor and nutritional profile.
  3. Growing medium: Although soil is not required for growing microgreens in a jar, a growing medium is necessary for the seeds to anchor and draw nutrients from. Suitable growing mediums include coconut coir, peat moss, or a combination of these materials.
  4. Water: Use clean, filtered water for watering the microgreens.
  5. Mesh or cheesecloth: This material will be used to cover the jar opening, allowing for air circulation while preventing insects or debris from entering the jar.
  6. Rubber bands or jar lids with holes: These will be used to secure the mesh or cheesecloth to the jar.
  7. Spray bottle: A spray bottle is helpful for gently watering the seeds and young microgreens.
  8. Scissors: A sharp pair of scissors will be needed for harvesting the microgreens when they are ready.

Step-by-Step Guide on How to Grow Microgreens in a Jar

Now that the necessary materials have been gathered, it’s time to begin the process of growing microgreens in a jar. Follow these steps for successful cultivation:

  1. Prepare the jar: Thoroughly clean and dry the jar, ensuring that it is free from any residue or contaminants.
  2. Prepare the growing medium: Moisten the chosen growing medium with water, ensuring that it is damp but not overly saturated. Place approximately 1-2 inches of the growing medium at the bottom of the jar.
  3. Sow the seeds: Sprinkle a layer of seeds evenly across the surface of the growing medium. The seeds should be close together but not piled on top of each other. Lightly press the seeds into the growing medium, ensuring that they make good contact.
  4. Water the seeds: Using a spray bottle, gently mist the seeds with water. The seeds should be damp but not soaking wet.
  5. Cover the jar: Place a piece of mesh or cheesecloth over the opening of the jar and secure it with a rubber band or a jar lid with holes.
  6. Place the jar in a location with indirect light: Avoid placing the jar in direct sunlight, as this can cause the seeds to dry out too quickly. A location with gentle, indirect light is ideal.
  7. Monitor and maintain the microgreens: Check the microgreens daily, ensuring that the growing medium remains damp. Use the spray bottle to mist the seeds and young microgreens as needed.
  8. Move the jar to a location with direct sunlight: Once the microgreens have developed their first true leaves, move the jar to a sunny windowsill or other location with direct sunlight. This will encourage the microgreens to grow taller and stronger.
Lucerne or Alfalfa, mung bean sprouts, broccoli sprouts seeds in glass jars | FotoHelin

Choosing the Right Microgreens for Jar Cultivation

While many microgreens can be successfully grown in a jar, some varieties are better suited to this method of cultivation than others. When selecting microgreens for jar cultivation, consider the following factors:

  1. Size: Choose microgreens with a compact growth habit, as they will be less likely to become overcrowded in the jar. Varieties such as radish, broccoli, and kale are good options for jar cultivation.
  2. Growth rate: Some microgreens grow more quickly than others, making them better suited to jar cultivation. Fast-growing varieties such as mustard, arugula, and cress can be harvested within a week or two of sowing.
  3. Flavor and nutritional profile: Consider the taste and nutritional benefits of the microgreens when selecting varieties for jar cultivation. Some microgreens are more flavorful than others, while others offer a more diverse range of nutrients.
  4. Availability of seeds: Ensure that the seeds for the chosen microgreens are readily available from a reputable supplier.

Caring for Your Microgreens in a Jar

Proper care is essential for the successful cultivation of microgreens in a jar. Here are some tips to keep in mind:

  1. Keep the growing medium moist: It is crucial to maintain a consistently damp growing medium, as dry conditions can cause the seeds to fail to germinate or the young microgreens to wilt. Use a spray bottle to gently mist the seeds and microgreens as needed.
  2. Provide adequate light: Microgreens require sufficient light to grow strong and healthy. Ensure that the jar is placed in a location with adequate indirect light during the initial stages of growth, and then moved to a location with direct sunlight once the first true leaves have developed.
  3. Monitor the jar for pests and diseases: Although growing microgreens in a jar reduces the risk of pests and diseases, it is still important to regularly inspect the plants for any signs of trouble. If any issues are detected, address them promptly to prevent them from spreading or causing further damage.
  4. Rotate the jar: To ensure that all sides of the microgreens receive equal exposure to sunlight, rotate the jar by 180 degrees every day or two.

Harvesting and Using Microgreens from a Jar

Once the microgreens have reached the desired size – typically between 1-3 inches in height – they are ready to be harvested. Use a clean, sharp pair of scissors to cut the microgreens just above the growing medium, taking care not to disturb the roots. Rinse the harvested microgreens gently under cool water and pat them dry with a clean paper towel.

Microgreens can be used in a wide variety of dishes, from salads and sandwiches to stir-fries and smoothies. They can also be used as a colorful and nutritious garnish for soups, pasta dishes, and more. To maximize the flavor and nutritional benefits of microgreens, use them as soon as possible after harvesting.

Troubleshooting Common Microgreen Growing Issues

Despite the relative ease of growing microgreens in a jar, some common issues can arise. Here are some tips for troubleshooting these problems:

  1. Seeds not germinating: If the seeds fail to germinate, it may be due to insufficient moisture, incorrect temperature, or poor-quality seeds. Ensure that the growing medium remains consistently damp and that the jar is kept in a location with appropriate temperatures for germination. If these factors are not the issue, consider sourcing seeds from a different supplier.
  2. Mold or fungus: If mold or fungus appears in the jar, it may be due to excessive moisture or poor air circulation. Ensure that the growing medium is damp but not overly saturated, and that the mesh or cheesecloth covering the jar is allowing for adequate air circulation.
  3. Leggy or weak microgreens: If the microgreens appear leggy or weak, it may be due to insufficient light. Ensure that the jar is placed in a location with adequate indirect light during the initial stages of growth, and then moved to a location with direct sunlight once the first true leaves have developed.
  4. Pests: Although pests are less common when growing microgreens in a jar, theycan still be a problem. If pests are detected, such as aphids or spider mites, try removing them manually with a soft brush or spray the microgreens with a mixture of water and mild soap. If the problem persists, consider discarding the affected microgreens and starting fresh with a clean jar and fresh seeds.

Benefits of Including Microgreens in Your Diet

Microgreens are not only tasty and visually appealing, but they also offer a range of health benefits. These tiny plants are packed with nutrients, including vitamins, minerals, and antioxidants. Here are some of the benefits of including microgreens in your diet:

  1. Improved nutrient intake: Microgreens are rich in vitamins and minerals, making them an excellent way to boost your nutrient intake. They also contain higher levels of certain nutrients than their mature counterparts, such as vitamin C and vitamin E.
  2. Antioxidant properties: Microgreens are high in antioxidants, which help to protect the body from damage caused by free radicals. Free radicals are unstable molecules that can damage cells and contribute to the development of chronic diseases.
  3. Reduced risk of chronic diseases: The high nutrient and antioxidant content of microgreens may help to reduce the risk of chronic diseases, such as heart disease, diabetes, and certain types of cancer.
  4. Improved digestion: Microgreens are a good source of dietary fiber, which can help to improve digestion and promote regularity.


Growing microgreens in a jar is a simple and rewarding way to add fresh, nutritious greens to your diet. With just a few simple materials and some basic care, anyone can successfully cultivate microgreens in a jar. Whether you are a seasoned gardener or a beginner, this method of cultivation offers a fun, eco-friendly, and space-saving way to grow your own food. Experiment with different varieties of microgreens to find your favorites, and enjoy the many health benefits that these tiny plants have to offer.

Happy growing!

Ready to start growing microgreens in a jar? Gather your materials and get started today! With this guide, you’ll have everything you need to successfully cultivate your own microgreens in a jar. Don’t forget to share your experience and favorite microgreen varieties with us in the comments below!

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this:
Verified by MonsterInsights