Can You Grow Rhubarb in a Pot? Tips and Techniques for Successful Container Gardening

Can You Grow Rhubarb in a Pot?

Yes, it is possible to grow rhubarb in a pot.

To successfully grow rhubarb in a pot, it is recommended to use a container that is at least 20 inches deep and wide.

Any type of container can be used as long as it has drainage holes.

Rhubarb should be planted in early spring in a lightweight and well-draining potting mix, along with compost.

It should be planted in full sunlight or partial shade.

Container-grown rhubarb may dry out more quickly than garden-grown rhubarb, so watering near the soil is recommended.

Mulching can help retain water.

Fertilization with ½ cup of 10-10-10 fertilizer can benefit the plant.

Allow the plant to mature for two years before harvesting, and remove any flowers that blossom in the spring to divert energy to producing stalks.

Cut back old stalks in the fall after the leaves die back, and protect the plant’s roots before winter.

Rhubarb leaves are toxic and should be kept away from children and pets.

Key Points:

  • Rhubarb can be grown in a pot that is at least 20 inches deep and wide.
  • Any type of container with drainage holes can be used.
  • Plant rhubarb in early spring using a lightweight, well-draining potting mix and compost.
  • Place the pot in full sunlight or partial shade.
  • Water near the soil to prevent drying out, and use mulch to retain moisture.
  • Fertilize with ½ cup of 10-10-10 fertilizer.

Did You Know?

1. Rhubarb leaves are poisonous: While rhubarb stalks are deliciously tart and edible, the leaves contain high levels of oxalic acid, which can be toxic to humans and pets. So, it’s important to know that only the stalks of the rhubarb plant are safe to consume.

2. Rhubarb is technically a vegetable: Despite being commonly used in sweet desserts, rhubarb is actually classified as a vegetable. In the United States, however, it is legally considered a fruit because of a historical court ruling that declared it so.

3. Rhubarb can be forced to grow in the dark: To produce an early crop of rhubarb, some gardeners use a practice known as “forcing.” This involves covering the crown of the rhubarb plant with a pot or bucket to block out light. The absence of light stimulates rapid growth, resulting in tender stalks that are ready to harvest earlier than usual.

4. Rhubarb has a long history as a medicinal plant: Rhubarb has been used for its medicinal properties for centuries. In ancient Chinese medicine, rhubarb was used as a laxative and to treat various digestive ailments. It was also believed to have anti-inflammatory and antibacterial properties.

5. Rhubarb was once more valuable than opium: During the 18th and 19th centuries, rhubarb was highly sought after and more expensive than opium in some parts of the world. Its importance was mainly due to its medicinal uses, as it was considered an effective treatment for conditions like constipation and liver complaints.

Container Requirements For Growing Rhubarb

Many gardening enthusiasts may have concerns about growing rhubarb in containers due to its large root system. However, it is possible to successfully grow rhubarb plants in pots with proper planning and attention to container requirements.

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To grow rhubarb in containers, you will need a container that is at least 20 inches deep and wide. This will provide enough room for the plant’s extensive root system to grow. It is important to make sure that the container has sufficient drainage holes to prevent waterlogging, which can lead to root rot or other problems. You can use various types of containers, such as traditional clay pots, recycled buckets, or wooden crates, as long as they meet these basic requirements.

Once you have chosen the right container, you can start the exciting process of planting and cultivating your own rhubarb crop.

  • Choose a container that is at least 20 inches deep and wide.
  • Ensure the container has sufficient drainage holes to prevent waterlogging.
  • Use various types of containers, such as clay pots, buckets, or wooden crates.
  • Plant and cultivate your rhubarb crop with care and attention.

“Growing rhubarb in containers requires proper planning and attention to container requirements. With the right container and care, you can successfully cultivate your own rhubarb crop.”

Planting And Care Tips For Container-Grown Rhubarb

Rhubarb is primarily grown for its delectable red, pink, or greenish-pink stalks, which add a burst of color and tang to a variety of dishes. It is important to remember that rhubarb is a cool weather perennial typically hardy in USDA zones 3-8. These hardy plants can live and produce for an impressive ten years when provided with proper care.

When it comes to potting your rhubarb, opting for a lightweight and well-draining potting mix is crucial. This ensures that water is adequately distributed and excess moisture is expelled. Incorporating compost into the potting mix is also recommended, as it helps nourish the plant and promote healthy growth.

Planting rhubarb in containers should ideally occur during early spring. This allows the plants ample time to establish their root systems before the warmer months arrive. It is essential to select high-quality plant divisions or purchased rhubarb crowns and position them in full sunlight. Rhubarb can tolerate some light shade, but sunlight is necessary for optimal growth and stalk production.

After planting, ensure that the crown is evenly watered but not over-saturated. Container-grown rhubarb has a tendency to dry out more quickly than its garden counterparts, so regular watering near the soil surface is recommended. Additionally, applying a layer of mulch, such as grass clippings or bark chips, can assist in retaining moisture and conserving water.

  • Use a lightweight and well-draining potting mix
  • Incorporate compost into the potting mix
  • Plant in containers during early spring
  • Select high-quality plant divisions or purchased rhubarb crowns
  • Position in full sunlight
  • Water crown evenly but not over-saturated
  • Regularly water near the soil surface
  • Apply mulch to retain moisture and conserve water
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Watering And Fertilizing Container-Grown Rhubarb

Watering and fertilizing are essential aspects of container gardening, ensuring that rhubarb plants receive the necessary nutrients for robust growth and high-quality stalk production.

Container-grown rhubarb may dry out more quickly than rhubarb cultivated in the ground. Therefore, regular watering is crucial, especially during hot and dry periods. It is best to water the plants near the soil surface to prevent the foliage from becoming excessively wet, which can lead to disease development. However, always check the soil moisture level before watering to avoid overwatering, as this can also be detrimental to the plants.

When it comes to fertilization, container-grown rhubarb will benefit from regular feedings. Applying a ½ cup of 10-10-10 fertilizer during spring and mid-summer will provide the necessary nutrients for vigorous growth. Ensure that you follow the manufacturer’s instructions for proper application and avoid over-fertilizing, as this can result in imbalanced growth or damage to the plants.

Harvesting And Maintenance Of Container-Grown Rhubarb

One of the most rewarding aspects of growing rhubarb in containers is the ability to harvest and enjoy the vibrant stalks in your favorite recipes. Exercise patience and allow the rhubarb plants to mature for at least two years before harvesting to establish a strong root system and ensure better productivity in the long run.

When harvesting rhubarb stalks, it is important to cut them at the base without damaging the crown or surrounding foliage. Harvest one-third of the stalks at a time and leave the remaining stalks to continue their growth. This practice ensures sustained growth and reduces excessive stress on the plants.

In the spring, rhubarb plants often produce flowers. However, removing these flowering stalks is crucial to divert the plant’s energy towards stalk production. This promotes a more bountiful harvest and prevents the plants from becoming exhausted or depleted due to seed production.

As fall approaches and the leaves begin to die back, cut back the old stalks. This helps maintain a tidy appearance, eliminates potential hiding spots for pests, and allows the plants to direct their energy towards root development over the winter.

Lastly, protect the plant’s roots during the winter months. While it is recommended to mulch most plants for protection, rhubarb requires a different approach. Avoid covering the buds or crown with mulch or compost, as this can lead to rot or disease. Instead, use a protective layer of straw or leaves around the base of the plant, allowing proper airflow and insulation.

  • Exercise patience and allow the rhubarb plants to mature for at least two years before harvesting.
  • Cut the stalks at the base without damaging the crown or surrounding foliage.
  • Harvest one-third of the stalks at a time and leave the remaining stalks to continue their growth.
  • Remove flowering stalks in the spring to divert the plant’s energy towards stalk production.
  • Cut back the old stalks in the fall to maintain a tidy appearance and promote root development over winter.
  • Protect the plant’s roots during the winter months by using a protective layer of straw or leaves around the base, avoiding mulch or compost.
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Safety Considerations For Rhubarb Leaves

While rhubarb stalks are prized for their culinary uses, it is important to exercise caution when handling and disposing of the plant’s leaves. Rhubarb leaves contain high levels of oxalic acid, making them toxic to humans and certain animals. Therefore, it is advisable to always wear gloves when working with rhubarb to minimize skin contact with the leaves.

Additionally, if you have children or pets, it is crucial to educate them about the potential dangers associated with rhubarb leaves and ensure they do not ingest or come into contact with them. Properly disposing of the leaves by composting or otherwise sealing them away from the reach of curious hands and paws is essential for the safety of your loved ones.

By following these tips and techniques, you can successfully grow rhubarb in containers, bringing the joy of fresh, tangy stalks right to your doorstep.


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Frequently Asked Questions

How big of a pot do you need for rhubarb?

When growing rhubarb in containers, it’s important to select a sturdy pot that is at least 20 inches (50.8 cm.) deep and wide. This will provide enough space for the plant’s roots to grow and allow the plant to reach its full potential. The size of the container directly impacts the size of the rhubarb plant, so opting for a larger pot will allow for a larger plant yield. While the type of container doesn’t necessarily matter, ensuring the presence of drainage holes is essential for proper water management and preventing root rot.

Will rhubarb survive in a pot?

Yes, rhubarb can thrive in a pot as long as it is provided with a spacious container, preferably with a capacity of at least 40 liters (10 US gallons). It is essential to use a soil-based potting mix and incorporate ample amounts of well-rotted manure or compost for optimal growth. By adhering to these guidelines, you can successfully cultivate rhubarb plants in pots and enjoy their delightful produce.

Does rhubarb like sun or shade?

Rhubarb is a sun-loving plant that thrives in sunny locations with moist, well-drained soil. While it can tolerate some shade, it is best to place rhubarb in a permanent home where it can receive ample sunlight without disturbance. This will ensure optimal growth and consistent year-to-year harvests.

Can rhubarb grow indoors?

Yes, rhubarb can be successfully grown indoors using the forcing method. By mimicking the conditions of late winter and early spring, tender rhubarb stalks can be forced to grow and produce a harvest out of season. This method, which was developed in the 1800s, allows for the cultivation of rhubarb indoors, providing the opportunity to enjoy this delightful crop even when it’s not in its natural growing season.

References: 1, 2, 3, 4

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