How to Force Rhubarb for an Early Harvest
Homegrown rhubarb is a delightful treat and can be used to make tasty desserts such as a rhubarb pie or a nice rhubarb crisp. It is also great for canning by boiling the stems into a sweet rhubarb jam that you can store away to enjoy throughout the year. The stems of the vegetable, also known as rhubarb sticks, can be harvested from about mid-spring up to the middle of summer. However, there's a way to "force rhubarb" for an even earlier tastier harvest.
Depriving plants of light is known as forcing and is a simple way of tricking them into early growth. Basically, the plant stretches out in search of light in the dark and grows quicker. Forced rhubarb stems appear paler in color compared to non-forced rhubarb, which is red. The delicacy is highly sought after for its pleasant taste and is far less bitter and not as tart as traditional rhubarb, which is a good reason to give it a try.
Forcing rhubarb is most effective during the late winter months when the plants are dormant. In regions with four-season climates, the ideal time to force rhubarb is from December to March, although it can be started as early as November.
When selecting which plants to force, choose the larger crowns in your rhubarb patch that are three years of age or older. Crowns are established plants that are at least one year old, as rhubarb is typically planted from crowns rather than propagated by seed. In terms of supplies, you will need a large container and mulch. Cover the rhubarb plants you wish to force with a pot, bucket, or rhubarb forcer that blocks out all light. Use tape to cover any holes or cracks to prevent light from getting in. Then, place mulch or manure around the outside of the container to insulate the plant and retain warmth, which will help accelerate growth. It is important to choose the appropriate type of mulch for optimal conditions.
Your rhubarb will be ready to harvest as soon as the stems touch the top of the container. This typically takes about eight weeks after covering.
When it comes to growing plants, forcing can be a challenging process. However, it is important to give forced plants a rest period to recover. This means that forced crowns should be left alone for the following year, allowing them to grow naturally. By doing so, the plants regain their strength, resulting in thicker stems.
If you want to achieve the best results, consider choosing a rhubarb variety that is specifically meant for forcing. Two popular options are "Victoria" and "Timperley Early," known for their high yields. Your local garden store should have suitable options for your climate. Rhubarb thrives in Hardiness Zones 3 to 8 and prefers areas where the ground freezes during winter, allowing the crowns to go into a dormant period.
Forcing rhubarb is an excellent way to enjoy an early crop, and the unique flavor it offers is a delightful treat.
