Planting Rhubarb In Pots – Grow Your Own Tart Treat Anywhere
Imagine harvesting fresh, vibrant rhubarb stalks right outside your campervan door or on your tiny homestead balcony. Many outdoor enthusiasts, from solo travelers to aspiring homesteaders, think growing rhubarb requires a vast garden plot. This simply isn’t true. With the right approach, even those with limited space can enjoy this versatile, tart perennial.
Learning how to successfully cultivate this resilient plant in containers opens up a world of fresh culinary possibilities. Whether you’re aiming for a self-sufficient lifestyle, enhancing your RV kitchen, or simply wanting to add a unique flavor to your outdoor cooking, planting rhubarb in pots is an achievable and rewarding endeavor.
This guide will equip you with the expert knowledge and practical steps to grow healthy, productive rhubarb in containers, ensuring you can enjoy delicious crumbles, jams, and sauces no matter where your adventures take you. Let’s get started on bringing this garden staple to your mobile or compact outdoor living space.
Table of Contents
Why Consider Planting Rhubarb in Pots?
Growing your own food is a cornerstone of self-sufficiency and outdoor living. For many OutwardLab readers, traditional in-ground gardening isn’t always feasible. Container gardening, especially for a resilient plant like rhubarb, offers incredible flexibility and control.
Space Efficiency for Small Gardens and Mobile Homes
Not everyone has acres of land. RV owners, van dwellers, and urban homesteaders often operate with minimal square footage. Pots allow you to utilize small patios, decks, or even sunny spots near your rig for a productive garden. This means fresh ingredients are always within reach, without needing a permanent plot.
Control Over Soil and Environment
When you grow in containers, you dictate the soil composition. This is a huge advantage, especially if your native soil is poor, rocky, or heavy clay – common challenges in diverse outdoor environments. You can create the perfect growing medium, ensuring optimal drainage and nutrient availability for your rhubarb plants.
Freshness for Culinary Adventures
There’s nothing quite like cooking with ingredients you’ve grown yourself. Freshly harvested rhubarb offers a superior flavor profile compared to store-bought options. Imagine whipping up a rhubarb crisp over a campfire or adding a tangy twist to your breakfast pancakes with your own homegrown stalks. It’s a simple pleasure that enhances any outdoor culinary experience.
Choosing the Right Container and Location
Success with container-grown rhubarb begins with selecting the proper home for your plant and placing it wisely. Rhubarb is a robust plant, but it needs specific conditions to thrive in a confined space.
Pot Size and Material Matters
Rhubarb develops an extensive root system. For healthy, long-term growth, choose a container that is at least 15-20 gallons (60-75 liters) in size, with a minimum diameter and depth of 18-24 inches (45-60 cm). Larger is generally better. Materials like heavy-duty plastic, glazed ceramic, or even half whiskey barrels work well. Avoid terracotta unless you’re prepared for very frequent watering, as it dries out quickly.
Drainage is Non-Negotiable
Adequate drainage is paramount. Ensure your chosen pot has multiple drainage holes at the bottom. Rhubarb roots will rot in standing water. If your pot only has one small hole, you might need to drill a few more. A layer of coarse gravel or broken pottery at the bottom of the pot is a good practice to prevent soil from blocking the drainage holes, though it doesn’t improve drainage itself.
Ideal Sun Exposure for Rhubarb
Rhubarb thrives in full sun, meaning at least 6-8 hours of direct sunlight per day. Position your pots in the sunniest spot available, whether that’s a south-facing patio, a well-lit deck, or an open area near your campsite. In extremely hot climates, some afternoon shade can be beneficial to prevent scorching and keep the plant from bolting prematurely.
Preparing Your Soil for Success
The quality of your potting mix directly impacts the health and productivity of your container-grown rhubarb. Don’t skimp on this crucial step.
The Perfect Potting Mix Recipe
Rhubarb prefers rich, well-draining soil. A good potting mix should be a blend that offers both moisture retention and aeration. A great mix would be:
- 50% high-quality potting soil: Look for organic options designed for vegetables.
- 25% compost or well-rotted manure: This provides essential nutrients and improves soil structure.
- 25% perlite or coarse sand: These amendments ensure excellent drainage and prevent compaction.
Mix these components thoroughly before adding them to your container. This custom blend will give your rhubarb roots the ideal environment to flourish.
Ensuring Proper Drainage Layers
Once you have your pot and your custom soil mix, prepare the pot. Place a small piece of mesh or landscape fabric over the drainage holes to prevent soil from washing out. Then, add a few inches of your prepared soil mix. This base layer will be where your rhubarb crown sits, so make sure it’s level and slightly firmed.
The Step-by-Step Guide to Planting Rhubarb in Pots
Now for the main event: getting your rhubarb into its new home. This section covers the specifics of planting rhubarb in pots, whether you’re starting from a crown or seeds.
Starting with Crowns or Seeds
While growing rhubarb from seed is possible, it’s a slower process and the resulting plants may not be true to type. For reliable and quicker harvests, most gardeners choose to start with a rhubarb crown. Crowns are essentially divisions of mature plants, already containing a developed root system and dormant buds.
- From Crowns: Purchase healthy, firm crowns from a reputable nursery. Look for at least one visible bud.
- From Seed: If starting from seed, sow indoors 8-10 weeks before the last frost. Transplant seedlings carefully once they are robust enough.
Planting Depth and Spacing
When you are ready for planting rhubarb in pots, handle the crown gently. Create a small mound of soil in the center of your prepared pot. Place the rhubarb crown on top of this mound, spreading the roots out around it. The top of the crown, where the buds are, should be just at or slightly below the soil surface. Ensure the entire crown is covered with about an inch of soil. If planting multiple crowns in a very large container, maintain at least 2-3 feet (60-90 cm) between them to allow for mature growth.
Initial Watering and Settling In
After positioning and covering the crown, water thoroughly. This helps settle the soil around the roots and eliminates air pockets. Keep the soil consistently moist, but never waterlogged, during the initial establishment period. It can take a few weeks for new shoots to emerge. Be patient; good things come to those who wait, especially when cultivating perennials.
Essential Care and Maintenance for Potted Rhubarb
Once your rhubarb is planted, ongoing care is crucial for a productive plant. Container plants often need more attention than their in-ground counterparts, especially concerning water and nutrients.
Watering Schedule and Moisture Monitoring
Potted rhubarb dries out faster than garden rhubarb. Check the soil moisture daily, especially during warm, sunny weather. Water deeply when the top inch of soil feels dry to the touch. Ensure water drains freely from the bottom of the pot. Consistent moisture is key; fluctuations can stress the plant. Consider using a drip irrigation system for larger pots, especially if you’re frequently on the move in an RV.
Fertilization for Robust Growth
Since nutrients leach out of containers with watering, regular feeding is essential. In early spring, apply a balanced organic fertilizer. Throughout the growing season, you can supplement with a diluted liquid feed every 2-4 weeks, especially after harvesting. Look for fertilizers rich in nitrogen for leafy growth and potassium for overall plant health. Compost tea is also an excellent natural boost.
Pest and Disease Management
Rhubarb is generally hardy, but container plants can still face issues. Keep an eye out for common garden pests like aphids or slugs. A strong spray of water can dislodge aphids, while organic slug baits or hand-picking can manage slugs. Ensure good air circulation around your plant to prevent fungal diseases. If you spot any diseased leaves, remove them promptly. Healthy plants are your best defense.
Winterizing Your Container Rhubarb
Rhubarb is cold-hardy, but potted plants are more vulnerable to freezing temperatures than those in the ground. In colder climates (zones 5 and below), consider moving your pots to an unheated garage, shed, or sheltered area once the foliage dies back in the fall. You can also insulate the pot by wrapping it in burlap or bubble wrap, or by burying the pot in the ground. Reduce watering significantly during dormancy.
Harvesting Your Rhubarb: When and How
The moment of truth! Harvesting your homegrown rhubarb is incredibly satisfying. Knowing when and how to do it correctly ensures the plant remains healthy and productive for years to come.
Knowing When to Harvest
Patience is a virtue with rhubarb. Do not harvest any stalks during the first year of growth after planting. This allows the plant to establish a strong root system. In the second year, you can harvest lightly for 2-3 weeks. From the third year onwards, you can enjoy a full harvest season, typically from spring through early summer. Harvest stalks when they are at least 10-15 inches (25-38 cm) long and about an inch thick.
The Proper Pulling Technique
Never cut rhubarb stalks; always pull them. Grasp the stalk firmly at its base, twist slightly, and pull it cleanly from the crown. This method helps prevent disease and encourages the plant to produce more stalks. Only harvest about one-third to one-half of the stalks at any given time to avoid overstressing the plant. Remember, only the stalks are edible; the leaves are poisonous due to high oxalic acid content. Discard them safely.
Storing Your Fresh Rhubarb
Fresh rhubarb stalks can be stored in the refrigerator for up to a week. Wrap them loosely in a damp paper towel and place them in a plastic bag. For longer storage, rhubarb freezes beautifully. Chop the stalks into desired lengths, spread them in a single layer on a baking sheet to freeze, then transfer to freezer bags. It can last for up to a year, ready for your next batch of pie or compote.
Troubleshooting Common Rhubarb Pot Problems
Even with the best intentions, you might encounter a few hiccups when growing rhubarb in containers. Here’s how to address some common issues.
Yellowing Leaves and Stunted Growth
Yellowing leaves often indicate a nutrient deficiency, usually nitrogen, or improper watering. First, check your watering schedule; ensure the soil is consistently moist but not waterlogged. If watering is correct, apply a balanced liquid fertilizer. Stunted growth can also be a sign of a pot that’s too small, indicating the plant is root-bound. Consider repotting into a larger container.
Bolting and What It Means
Bolting is when the rhubarb plant sends up a flower stalk. While beautiful, this signals the plant is putting its energy into seed production rather than stalk growth, which can reduce your harvest. Bolting can be triggered by stress, such as extreme heat, drought, or insufficient nutrients. Promptly cut off any flower stalks at their base to redirect the plant’s energy back to producing edible stalks. Ensure consistent watering and consider providing some afternoon shade in hot climates.
Overwintering Challenges
The biggest challenge for potted rhubarb in cold climates is protecting the roots from deep freezes. As mentioned, moving pots to a sheltered, unheated location is ideal. If that’s not possible, insulating the pot well can make a difference. Without adequate protection, the roots can freeze solid and die, especially if the pot material offers poor insulation. Monitor local temperatures and prepare your plants before the harshest cold sets in.
Frequently Asked Questions About Planting Rhubarb in Pots
Here are some common questions we hear from fellow adventurers about growing rhubarb in containers.
Can I grow rhubarb from store-bought stalks?
No, you cannot grow rhubarb from store-bought stalks. The stalks are cut from the plant’s leaves and do not contain the crown or root system needed to regenerate. You need a rhubarb crown (a root division) or seeds to start a new plant.
How long does it take for potted rhubarb to produce?
Typically, you should not harvest any stalks in the first year after planting to allow the plant to establish a strong root system. You can begin light harvesting in the second year, and a full harvest will be possible from the third year onwards.
What are the best rhubarb varieties for containers?
While most rhubarb varieties can grow in pots, some compact or earlier-producing types are excellent choices. Varieties like ‘Victoria,’ ‘Canada Red,’ and ‘Strawberry’ are popular for their vigor and flavor, adapting well to container life with adequate space.
Does rhubarb need to be divided when grown in pots?
Yes, even in pots, rhubarb benefits from division every 5-8 years. This rejuvenates the plant, prevents overcrowding, and maintains vigor. You’ll notice production declining when it’s time to divide. Simply unpot the plant, cut the crown into sections with a sharp spade, ensuring each section has at least one bud, and repot.
Successfully cultivating rhubarb in pots is a testament to the versatility of container gardening and a great step towards greater self-sufficiency, no matter your outdoor lifestyle. From a compact homestead plot to a mobile RV setup, fresh rhubarb can be a delightful addition to your culinary repertoire.
Embrace the challenge, follow these practical steps, and enjoy the fruits (or rather, stalks!) of your labor. Planting rhubarb in pots is more than just gardening; it’s about making your outdoor living smarter and more delicious. Get your hands dirty, and happy growing!
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