How to Grow Rhubarb from Seed: A Comprehensive Guide

Growing Rhubarb from Seed: A Comprehensive Guide

Rhubarb (Rheum rhabarbarum) is a perennial vegetable prized for its tangy, edible stalks. It is commonly grown from crowns or divisions, but starting rhubarb from seed is a viable option for gardeners seeking a cost-effective and genetically diverse approach to propagation.

Benefits of Growing Rhubarb from Seed

1. Cost-effectiveness: Seeds are generally more affordable than purchasing mature crowns or plants.
2. Genetic Diversity: Starting from seed allows for greater genetic diversity, leading to potential variations in plant characteristics and improved resistance to pests and diseases.

Seed Selection

1. Choose high-quality seeds from reputable suppliers.
2. Select rhubarb cultivars suitable for your climate and desired characteristics. Some popular cultivars include ‘Victoria’, ‘Sutton’s Seedless’, and ‘Timperley Early’.

Seed Starting

1. Start seeds indoors 6-8 weeks before the last spring frost.
2. Prepare a seed starting mix with equal parts potting soil, perlite, and vermiculite.
3. Sow seeds 1/4 inch deep in the seed starting mix and cover lightly with soil.
4. Keep the seed starting mix consistently moist and provide adequate light.
5. Thin seedlings to 2-3 inches apart once they have developed their first set of true leaves.

Germination and Seedling Care

1. Rhubarb seeds typically germinate within 7-14 days at temperatures between 65-75°F (18-24°C).
2. Maintain optimal moisture levels by misting or watering the seedlings regularly.
3. Provide adequate light, such as placing the seedlings under grow lights or in a sunny window.

Transplanting

1. Transplant seedlings outdoors after the last spring frost when they have developed 3-4 true leaves.
2. Choose a well-drained location with full sun to partial shade.
3. Space plants 2-3 feet apart in rows 3-4 feet apart.
4. Harden off seedlings by gradually exposing them to outdoor conditions before transplanting.

Care and Maintenance

1. Water rhubarb plants regularly, especially during dry spells.
2. Fertilize plants in the spring with a balanced fertilizer.
3. Mulch around the plants to retain moisture and suppress weeds.
4. Monitor for pests and diseases, such as aphids, slugs, and powdery mildew.

Harvesting and Storing

1. Harvest rhubarb stalks when they are 12-18 inches long, typically in late spring or early summer.
2. Pull or twist the stalks at the base of the plant to remove them.
3. Store rhubarb stalks in the refrigerator for up to 2 weeks or freeze them for longer storage.

Troubleshooting

1. Address common problems such as poor germination, slow growth, and pest infestations.
2. Provide solutions to nutrient deficiencies, diseases, and pest control.

Conclusion

Growing rhubarb from seed is a rewarding experience that allows gardeners to cultivate this versatile vegetable in their own gardens. With proper care and attention, rhubarb plants can thrive for many years, providing a steady supply of tangy stalks for culinary creations. Whether you’re a seasoned gardener or just starting out, growing rhubarb from seed is an excellent way to enjoy the benefits of this delicious and nutritious vegetable.

Sources

• https://www.theseedcollection.com.au/blog/how-to-grow-rhubarb-from-seed
• https://blog.southernexposure.com/2015/02/growing-rhubarb-from-seed/
• https://gardenerspath.com/plants/vegetables/propagate-rhubarb-seed/

FAQs

How long does it take to grow rhubarb from seed?

From seed to harvest, rhubarb typically takes about 2 years. The first year is dedicated to growth and establishment, while the second year yields the first harvest.

When is the best time to start rhubarb seeds?

Start rhubarb seeds indoors 6-8 weeks before the last spring frost. This allows the seedlings to develop strong roots and leaves before being transplanted outdoors.

What kind of soil do rhubarb plants need?

Rhubarb prefers well-drained soil that is rich in organic matter. A pH range of 5.5 to 6.5 is ideal.

How much sun do rhubarb plants need?

Rhubarb plants thrive in full sun to partial shade. Aim for at least 6 hours of direct sunlight per day.

How far apart should rhubarb plants be spaced?

Space rhubarb plants 2-3 feet apart in rows 3-4 feet apart. This allows for proper air circulation and growth.

When can I harvest rhubarb?

Rhubarb is typically ready for harvest in late spring or early summer, when the stalks are 12-18 inches long.

How do I store rhubarb?

Fresh rhubarb stalks can be stored in the refrigerator for up to 2 weeks. For longer storage, rhubarb can be frozen for several months.

What are some common pests and diseases of rhubarb?

Common pests of rhubarb include aphids, slugs, and rhubarb curculio. Common diseases include powdery mildew, rust, and crown rot.

What are some companion plants for rhubarb?

Good companion plants for rhubarb include lettuce, spinach, onions, garlic, and marigolds. These plants can help repel pests and improve soil health.

Can rhubarb be grown in containers?

Yes, rhubarb can be grown in containers. Choose a container that is at least 18 inches wide and deep. Use a well-draining potting mix and fertilize regularly.