Rhubarb

Soil Preparation

Rhubarb is a hungry plant that will reward you generously if you give it a good start. It thrives in well-drained, fertile soil rich in organic matter. Before planting, amend your chosen spot deeply with plenty of compost or well-rotted manure. Rhubarb prefers a slightly acidic to neutral pH, ideally between 6.0 and 6.8. If your soil is heavy clay, consider building a raised bed to ensure proper drainage, as soggy conditions are a death knell for rhubarb crowns.

Planting

The best time to plant rhubarb is in early spring as soon as the soil can be worked, or in the fall in milder climates. You'll typically plant dormant crowns, which are pieces of an existing rhubarb plant with at least one bud. Dig a hole that's wide and deep enough to accommodate the roots without bending them. Place the crown so that the top of the crown, where the buds are, is about 1-2 inches below the soil surface. Space plants about 3-4 feet apart to give them plenty of room to grow. If starting from seed, sow indoors in late winter and transplant seedlings once they have several true leaves and are hardened off.

Watering

Consistent moisture is key, especially during the first year as your rhubarb establishes itself and during dry spells. Aim for about 1 inch of water per week, either from rainfall or irrigation. Avoid overhead watering if possible, as wet leaves can encourage fungal diseases. Once established, rhubarb is fairly drought-tolerant, but regular watering will lead to more tender and abundant stalks.

Fertilizing

Rhubarb is a heavy feeder. In early spring, before new growth begins, give your plants a good top-dressing of compost or well-rotted manure. You can also apply a balanced organic fertilizer. Avoid fertilizers high in nitrogen, as this can encourage leaf growth at the expense of stalk production. A good rule of thumb is to feed them once in spring and again after the main harvest in early summer.

Pruning

One of the most important pruning tasks for rhubarb is to remove any flower stalks as soon as they appear. These tall, asparagus-like stalks indicate that the plant is putting energy into producing seeds rather than developing juicy leaf stalks. Simply cut them off at the base. Also, remove any old, yellowing, or damaged leaves throughout the season to improve air circulation and direct energy to new growth.

Harvesting

Patience is a virtue with rhubarb. Do not harvest any stalks during the first year after planting; allow the plant to establish a strong root system. In the second year, you can harvest lightly for about 4-6 weeks. By the third year and beyond, you can enjoy a full harvest from spring through early summer. To harvest, gently pull the mature stalks from the base of the plant – don't cut them, as this can leave stubs that may rot. Harvest about one-third to one-half of the stalks at a time, leaving plenty for the plant to continue growing. Stop harvesting by mid-summer to allow the plant to store energy for the following year.

Winter Care

Once the foliage dies back in the fall, you can cut off the remaining dead leaves at ground level. In colder climates, a generous layer of mulch (straw, leaves, or wood chips) over the crown will help protect it from harsh winter temperatures. This mulch will also break down over winter, adding valuable organic matter to the soil.

Rhubarb, or Rheum rhabarbarum, boasts a fascinating journey from ancient medicine to a beloved spring culinary delight. Its origins are deeply rooted in the cold, mountainous regions of Siberia and Central Asia, particularly along the Yellow River in China. For thousands of years, primarily the roots of various Rheum species were revered in traditional Chinese medicine for their potent laxative and purgative properties. It was considered a valuable commodity, often traded along the ancient Silk Road, long before anyone thought of baking it into a pie.

The plant made its way to Europe much later, initially as a highly prized medicinal herb. Marco Polo is often credited with introducing knowledge of rhubarb to the West in the late 13th century, though its widespread adoption was slow. European apothecaries valued its roots so highly that it was often more expensive than opium and other exotic spices, leading to attempts to cultivate it locally in countries like Russia and England. However, these early efforts focused almost exclusively on its medicinal roots, not the stalks we cherish today.

The shift from medicine to food began in the 18th century. It’s believed that its culinary use first took hold in Britain, largely due to the increasing availability and affordability of sugar. Before sugar became common, rhubarb's intensely tart flavor was simply too unpalatable for most. Once sugar could temper its acidity, its potential as a dessert ingredient blossomed, especially for pies, crumbles, and jams. Its early arrival in spring, when other fruits were scarce, further cemented its place in the European and North American diet.

By the 19th century, rhubarb was a common garden plant across Europe and had traveled with settlers to North America, where it quickly became a staple in home gardens. It earned nicknames like “pie plant” and “gardeners’ delight” due to its robust nature and the ease with which it could be grown. The domestication process focused on selecting varieties with thicker, less fibrous, and more flavorful stalks, leading to the delicious cultivars we enjoy today. Its remarkable resilience and ability to thrive in cooler climates ensured its enduring popularity.