When and How to Plant Rhubarb from Bulb for a Bountiful Harvest

Rhubarb is a rewarding perennial vegetable that adds a tart, refreshing flavor to pies, jams, and sauces. Growing rhubarb from a bulb, also called a crown, is a straightforward way to start your own patch. Knowing the right time and method to plant rhubarb bulbs can make a big difference in how well your plants establish and how much you harvest in the years ahead. This guide explains when to plant rhubarb bulbs and how to care for them to enjoy a bountiful harvest.

Freshly planted rhubarb bulb in garden soil

Best Time to Plant Rhubarb Bulbs

Planting rhubarb bulbs at the right time ensures strong root development before the growing season begins. The ideal time depends on your climate:

• Early spring is the most common and recommended time to plant rhubarb bulbs. As soon as the soil can be worked and is not frozen, usually between late March and early April, you can plant. This timing gives the plant a full growing season to establish.

• In milder climates with mild winters, rhubarb bulbs can also be planted in late fall. This allows roots to develop during the cooler months and the plant to break dormancy in spring.

• Avoid planting in the heat of summer or when the soil is waterlogged, as this can stress the bulb and reduce success.

  
  

Choosing the Right Location

Rhubarb thrives in a sunny spot with some afternoon shade in hotter regions. Here are key factors to consider:

• Soil: Rhubarb prefers well-drained, fertile soil rich in organic matter. Loosen the soil to a depth of 12 to 15 inches and mix in compost or aged manure.

• Space: Plant bulbs about 3 feet apart to allow room for mature crowns to spread.

• Drainage: Avoid low spots where water collects. Rhubarb crowns can rot if left in soggy soil.

  
  

Preparing the Rhubarb Bulb for Planting

Before planting, inspect your rhubarb bulb:

• Choose healthy bulbs with firm, plump crowns and visible buds.

• If the bulb is dry, soak it in water for a few hours to rehydrate.

• Trim any damaged or broken roots with clean scissors.

  
  

Step-by-Step Planting Guide

Follow these steps to plant rhubarb bulbs successfully:

1. Dig a hole about 12 inches wide and 8 inches deep.

2. Add compost or well-rotted manure to the bottom of the hole to enrich the soil.

3. Place the bulb in the hole with the buds facing upward. The top of the crown should be about 1 to 2 inches below the soil surface.

4. Fill the hole with soil, firming gently around the bulb to remove air pockets.

5. Water thoroughly to settle the soil and provide moisture for root growth.

6. Mulch around the plant with straw or shredded leaves to conserve moisture and suppress weeds.

   
   

Planting rhubarb bulb in garden soil

Caring for Rhubarb After Planting

Proper care during the first year helps rhubarb bulbs establish strong roots and healthy crowns:

• Watering: Keep the soil consistently moist but not waterlogged, especially during dry spells.

• Feeding: Apply a balanced fertilizer or compost in early spring and again after the first harvest season.

• Weeding: Remove weeds regularly to reduce competition for nutrients and water.

• Avoid harvesting: Do not harvest any stalks during the first year. Let the plant build energy for future growth.

  
  

When to Harvest Rhubarb

Rhubarb plants grown from bulbs usually produce their first harvest in the second year. Here’s how to know when to pick:

• Harvest stalks when they reach 10 to 15 inches long and are firm.

• Pull or cut stalks near the base, avoiding the leaves, which are toxic.

• Limit harvesting to about one-third of the stalks at a time to keep the plant healthy.

• Stop harvesting by early summer to allow the plant to recover.

  
  

Mature rhubarb stalks ready for harvest

Troubleshooting Common Issues