How to Grow Rhubarb Plant Indoors

Rhubarb is a versatile and delicious vegetable that is often used in pies, tarts, and jams. While it is typically grown outdoors in gardens, it is also possible to grow rhubarb plants indoors. This allows you to enjoy fresh rhubarb year-round, regardless of your location or climate. In this article, we will discuss the steps involved in growing rhubarb indoors and provide tips for success.

Choosing the Right Variety

When growing rhubarb indoors, it is important to choose a variety that is well-suited for container gardening. Some varieties are more compact and have smaller root systems, making them ideal for growing in pots. Two popular indoor varieties are Valentine and Victoria.

Valentine rhubarb is known for its vibrant red stalks and sweet flavor. It is a relatively compact variety, making it easier to grow in containers. Victoria rhubarb, on the other hand, has green-red stalks and a slightly tangier taste. Both varieties are excellent choices for indoor cultivation.

Preparing the Container

Selecting the right container is crucial for the success of your indoor rhubarb plant. Choose a large pot with good drainage holes to prevent waterlogging. A container with a diameter of at least 18 inches (45 cm) will provide enough space for the roots to grow.

Fill the container with well-draining soil that is rich in organic matter. A mix of compost, potting soil, and perlite or vermiculite will provide the ideal growing conditions for your rhubarb plant.

Planting

To start growing your indoor rhubarb plant, you have two options: planting from seeds or using crowns. Planting from seeds requires more time and patience as it takes longer for the plant to establish itself. Crowns, on the other hand, are small sections of mature rhubarb plants that can be transplanted directly.

If you choose to use crowns, make sure they are healthy and free from any signs of disease or damage. Plant the crowns about 2 inches (5 cm) deep into the soil, spacing them at least 24 inches (60 cm) apart. This will give enough room for the plants to grow and spread.

Water the newly planted crowns thoroughly and keep the soil consistently moist, but not waterlogged. Rhubarb plants require regular watering, especially during hot and dry periods.

Providing the Right Growing Conditions

Rhubarb plants thrive in cool temperatures and require a period of dormancy during winter. To provide the ideal growing conditions for your indoor rhubarb plant, place it in a location where it will receive at least six hours of direct sunlight each day. A south-facing window or a spot under grow lights will work well.

Maintain a temperature range of 50-75°F (10-24°C) throughout the growing season. Avoid exposing the plant to extreme heat or cold, as it can negatively affect its growth and overall health.

Fertilizing and Pruning

To promote healthy growth and abundant harvests, it is important to fertilize your indoor rhubarb plant regularly. Use a balanced organic fertilizer, applying it according to the manufacturer’s instructions. Fertilize every two to four weeks during the growing season, starting from early spring until late summer.

Pruning is another essential task when growing rhubarb indoors. Remove any dead or damaged leaves regularly to prevent the spread of diseases. Additionally, remove flower stalks as soon as they appear, as they divert energy away from stalk production.

Harvesting

Once your indoor rhubarb plant reaches maturity, which usually takes two to three years, you can start harvesting stalks for consumption. To harvest rhubarb properly, hold the stalk near the base and gently pull it away from the plant. Avoid cutting the stalk with a knife, as this can introduce bacteria and increase the risk of rotting.

Harvest only a third to a half of the stalks at a time, allowing the remaining ones to continue growing. Regular harvesting will encourage the plant to produce more stalks throughout the season.

Overwintering

During winter, rhubarb plants go into dormancy. To ensure their survival, it is important to provide them with proper care during this period. Reduce watering and stop fertilizing in late autumn when the plant starts losing its leaves.

If your indoor rhubarb plant is in a container, move it to a cool and dark location, such as an unheated basement or garage. The temperature should be kept between 35-45°F (2-7°C). Insulate the pot if necessary to protect the roots from freezing.

Troubleshooting Common Issues

Growing rhubarb indoors comes with its own set of challenges. Here are some common issues you may encounter and how to address them:

Lack of sunlight: If your indoor space lacks sufficient sunlight, consider using supplemental grow lights to ensure your rhubarb plant receives the necessary light.
Pests: Rhubarb plants are relatively resistant to pests. However, keep an eye out for aphids, slugs, or snails. Use organic pest control methods or insecticidal soap if necessary.
Diseases: Powdery mildew and crown rot are common diseases that can affect rhubarb plants. Ensure good air circulation around the plant and avoid overwatering to prevent these issues.

By following these guidelines, you can successfully grow rhubarb plants indoors and enjoy their tangy goodness all year round. With a little patience and care, you’ll be able to harvest fresh rhubarb for your culinary creations whenever you desire. Happy gardening!