Rhubarb Planting: A Complete Guide to Growing This Hardy Perennial

Introduction

Rhubarb is a much-loved perennial vegetable that’s easy to grow and thrives in most gardens. Known for its tangy stalks, rhubarb is perfect for pies, crumbles, jams, and sauces, making it a must-have plant for gardeners and cooks alike. Proper planting is key to ensuring healthy growth and a bountiful harvest year after year.

This guide will provide step-by-step instructions on how to plant rhubarb, whether you’re using bare-root crowns, potted plants, or starting from seeds.

Why Plant Rhubarb?

Perennial Crop: Rhubarb plants produce for up to 10-15 years or more with minimal care.
Low Maintenance: Once established, rhubarb requires very little upkeep.
Hardy and Resilient: Rhubarb thrives in cooler climates and can survive frost.
Decorative and Functional: Rhubarb’s large leaves and colorful stalks add visual interest to your garden.
Versatile Uses: Rhubarb stalks are perfect for sweet and savory recipes.

When to Plant Rhubarb

1. Bare-Root Crowns

Plant in late autumn or early spring when the soil is workable.

2. Potted Rhubarb Plants

These can be planted at any time of year, but spring and autumn are ideal.

3. Rhubarb Seeds

Sow seeds indoors in late winter or early spring, 8-10 weeks before the last frost. Transplant seedlings outdoors in late spring or early summer.

Choosing the Right Rhubarb Variety

1. Timperley Early

Description: Produces tender, pink-red stalks early in the season.
Best For: Early harvesting.

2. Victoria

Description: A traditional, heavy-cropping variety with thick, greenish-red stalks.
Best For: Consistent yields and long harvest seasons.

3. Glaskins Perpetual

Description: Produces sweet stalks even late into the season.
Best For: Extended harvesting.

4. Champagne

Description: Known for its slender, sweet stalks and vibrant red color.
Best For: Desserts and jams.

Preparing to Plant Rhubarb

1. Choose the Right Location

Sunlight: Rhubarb thrives in full sun but can tolerate partial shade.
Soil: Requires rich, well-draining soil with a slightly acidic to neutral pH (6.0-7.0).
Space: Allow at least 3-4 feet between plants to accommodate their large size.

2. Soil Preparation

Test the soil’s pH and adjust as necessary. Add lime to raise pH or sulfur to lower it.
Incorporate plenty of organic matter, such as compost or well-rotted manure, into the planting area.

3. Drainage

Ensure the soil drains well to prevent waterlogging, which can lead to crown rot.

How to Plant Rhubarb

1. Planting Bare-Root Crowns

Dig a hole about 12 inches wide and 12 inches deep.
Add a generous amount of compost or well-rotted manure to the hole and mix it into the soil.
Place the crown in the hole with the buds facing upward, just above the soil surface.
Backfill with soil, gently firming it around the crown.
Water thoroughly to help the roots establish.

2. Planting Potted Rhubarb Plants

Dig a hole twice the size of the root ball.
Remove the plant from its pot and loosen the roots gently.
Place the plant in the hole so the crown is level with the soil surface.
Backfill with soil and water well.

3. Planting Rhubarb Seeds

Sow seeds 1cm deep in pots filled with seed compost.
Keep the compost moist and place pots in a warm, bright location.
Transplant seedlings outdoors when they are 10-15cm tall and after the last frost.

Caring for Newly Planted Rhubarb

1. Watering

Water regularly during dry periods to keep the soil consistently moist but not waterlogged.

2. Mulching

Apply a thick layer of mulch, such as straw or compost, around the base of the plant. This helps retain moisture, suppress weeds, and provide nutrients.

3. Feeding

In early spring, feed rhubarb with a balanced fertilizer or well-rotted manure. Avoid over-fertilizing, as this can lead to excessive leaf growth at the expense of stalk production.

4. Removing Flower Stalks

Cut off any flower stalks as soon as they appear to encourage vegetative growth.

Harvesting Rhubarb

1. When to Harvest:

Do not harvest rhubarb in its first year to allow the plant to establish.
Begin harvesting in the second year from mid-spring to early summer.

2. How to Harvest:

Hold the stalk near the base and twist gently to pull it away.
Alternatively, use a sharp knife to cut the stalk at the base.
Harvest no more than one-third of the stalks at a time to avoid stressing the plant.

3. Harvesting Tips:

Only harvest stalks that are 12-18 inches long.
Discard the leaves, as they are toxic due to high levels of oxalic acid.

Overwintering Rhubarb

In late autumn, cut back the foliage to about 5cm above the crown.
Add a thick layer of mulch, such as straw or compost, over the crown to protect it from frost.

Common Problems with Rhubarb Planting

1. Crown Rot

Cause: Poor drainage or planting the crown too deep.
Solution: Plant crowns with buds just above the soil surface and ensure proper drainage.

2. Weak Growth

Cause: Nutrient deficiency or overcrowding.
Solution: Feed the plant with a balanced fertilizer and divide overcrowded crowns every 5-7 years.

3. Pests and Diseases

Cause: Slugs, snails, and fungal diseases.
Solution: Use organic slug deterrents and maintain good airflow around the plant.

FAQs About Rhubarb Planting

1. When is the best time to plant rhubarb?
Late autumn or early spring is ideal for planting bare-root crowns.

2. Can rhubarb grow in pots?
Yes, rhubarb thrives in large pots with nutrient-rich, well-draining soil.

3. How deep should I plant rhubarb crowns?
Plant crowns with the buds just above the soil surface to prevent rot.

4. How much space does rhubarb need?
Allow 3-4 feet between plants to give them room to grow.

5. How often should I water newly planted rhubarb?
Water regularly to keep the soil moist, especially during dry spells.

6. Can rhubarb grow in shade?
Rhubarb prefers full sun but can tolerate partial shade.

7. Should I fertilize rhubarb after planting?
Yes, apply a balanced fertilizer in early spring to promote growth.

8. When can I harvest rhubarb after planting?
Begin harvesting in the second year after planting to allow the plant to establish.

9. How do I protect rhubarb in winter?
Cut back the foliage and mulch the crown to protect it from frost.

10. How long do rhubarb plants live?
Rhubarb plants can live and produce for 10-20 years with proper care.

Conclusion

Planting rhubarb is a straightforward process that yields years of delicious harvests. Whether you’re planting crowns, potted plants, or starting from seeds, following the proper steps ensures a healthy, productive plant. With minimal maintenance and a bit of care, rhubarb will reward you with abundant stalks for cooking and baking.

Start planting rhubarb today and enjoy the satisfaction of growing this hardy and versatile perennial!