What To Know
- Place the seed trays under a grow light or in a sunny windowsill.
- Gradually acclimate the seedlings to outdoor conditions by placing them in a sheltered spot for a few hours each day, increasing the exposure time over several days.
- Store harvested stalks in the refrigerator for up to a week or freeze them for longer storage.
Rhubarb, with its vibrant stalks and tangy flavor, is a beloved ingredient in many kitchens. While it’s often propagated through divisions or crowns, growing rhubarb from seed can be a rewarding and surprisingly straightforward process. This comprehensive guide will walk you through the steps, from sowing the seeds to harvesting your own delicious rhubarb.
Understanding Rhubarb and Its Growth Habits
Before embarking on your rhubarb-growing journey, it’s essential to understand the basics of this fascinating plant. Rhubarb, scientifically known as *Rheum rhabarbarum*, is a perennial vegetable that thrives in cool climates. Its large, deeply lobed leaves are not edible, but the fleshy stalks are a culinary treasure. Rhubarb plants can live for many years, producing a bountiful harvest each spring and early summer.
Choosing the Right Rhubarb Seeds
Selecting the right rhubarb seeds is crucial for a successful harvest. Here are some factors to consider:
- Variety: Choose a variety that suits your climate and desired flavor profile. Some popular choices include ‘Victoria’, ‘Crimson Red’, and ‘McDonald’.
- Source: Opt for reputable seed suppliers known for high-quality seeds.
- Freshness: Look for seeds that are fresh and have not been stored for extended periods.
Starting Your Rhubarb Seeds Indoors
Starting rhubarb seeds indoors allows you to get a head start on the growing season and ensures optimal germination conditions. Here’s how to do it:
1. Prepare Seed Starting Mix: Fill seed trays or pots with a well-draining seed starting mix.
2. Sow Seeds: Lightly press the seeds into the soil, spacing them about 1 inch apart.
3. Cover with Soil: Sprinkle a thin layer of soil over the seeds.
4. Water Gently: Mist the soil surface with water, ensuring it remains moist.
5. Provide Light: Place the seed trays under a grow light or in a sunny windowsill.
6. Maintain Temperature: Keep the temperature around 70°F (21°C) for optimal germination.
Transplanting Rhubarb Seedlings
Once your rhubarb seedlings have developed a couple of true leaves, it’s time to transplant them outdoors. This typically happens around 4-6 weeks after sowing.
1. Hardening Off: Gradually acclimate the seedlings to outdoor conditions by placing them in a sheltered spot for a few hours each day, increasing the exposure time over several days.
2. Prepare the Garden Bed: Choose a sunny location with well-drained soil. Amend the soil with compost or aged manure to improve its fertility and drainage.
3. Transplant Seedlings: Dig individual holes slightly larger than the seedling’s root ball. Gently remove the seedlings from their containers, taking care not to damage the roots. Place them in the holes, ensuring the root crown is level with the soil surface.
4. Water Thoroughly: Water the newly transplanted seedlings well to settle the soil around their roots.
Caring for Your Rhubarb Plants
Once your rhubarb plants are established, proper care is essential for healthy growth and abundant harvests.
1. Watering: Keep the soil consistently moist, especially during the growing season. Water deeply and infrequently rather than shallowly and frequently.
2. Fertilizing: Feed your rhubarb plants with a balanced fertilizer in early spring. You can also use compost or aged manure as a natural fertilizer.
3. Mulching: Apply a layer of organic mulch around the plants to conserve moisture, suppress weeds, and moderate soil temperature.
4. Pest and Disease Control: Monitor your plants for signs of pests or diseases. If necessary, use organic pest control methods or consult a gardening expert.
Harvesting Rhubarb
The first year after planting, it’s best to avoid harvesting rhubarb to allow the plants to establish themselves. In subsequent years, you can begin harvesting the stalks in early spring, when they are about 12 inches tall.
1. Harvesting Technique: Use a sharp knife or scissors to cut the stalks at the soil level. Leave at least 2-3 stalks per plant to ensure continued growth.
2. Storage: Store harvested stalks in the refrigerator for up to a week or freeze them for longer storage.
Beyond the Basics: Tips for Success
Here are some additional tips to help you grow amazing rhubarb from seed:
- Spacing: Space your rhubarb plants 3-4 feet apart to allow for ample growth.
- Sunlight: Rhubarb plants prefer full sun but can tolerate partial shade.
- Winter Protection: In colder climates, mulch heavily around the plants to protect them from winter frost.
- Crop Rotation: Avoid planting rhubarb in the same spot year after year to prevent the buildup of soilborne diseases.
The End of the Journey: Enjoying Your Rhubarb Harvest
Growing rhubarb from seed might seem like a long process, but the satisfaction of harvesting your own delicious stalks is well worth the effort. From pies and crumbles to jams and chutneys, your homegrown rhubarb will add a delightful tang to your culinary creations.
What You Need to Know
Q: How long does it take for rhubarb seeds to germinate?
A: Rhubarb seeds can take anywhere from 2-4 weeks to germinate, depending on the temperature and other factors.
Q: Can I grow rhubarb from seed in pots?
A: While it’s possible to grow rhubarb in pots, it’s best to choose a large container with a minimum depth of 18 inches to accommodate the plant’s extensive root system.
Q: How often should I harvest rhubarb?
A: You can harvest rhubarb stalks every 2-3 weeks during the growing season, but be sure to leave some stalks on the plants to ensure continued growth.
Q: What are some common problems with growing rhubarb?
A: Rhubarb plants can be susceptible to pests like aphids and slugs, as well as diseases like crown rot and leaf spot. Monitor your plants regularly for any signs of problems and address them promptly.
Q: Can I use rhubarb leaves in cooking?
A: Rhubarb leaves contain high levels of oxalic acid, which is toxic. It’s best to avoid consuming rhubarb leaves.
