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How to grow Swiss chard rhubarb starts with understanding that this vibrant plant isn’t actual rhubarb at all, but a striking variety of Swiss chard with deep red stalks.
Growing Swiss chard rhubarb is surprisingly easy, even for beginners, because it’s a hardy, forgiving leafy green that thrives in cool weather.
If you’ve been wondering how to grow Swiss chard rhubarb successfully, you’ll be happy to know it’s one of the most rewarding vegetables to add to your garden.
In this post, we’ll cover the best planting times, soil prep, watering tips, harvesting methods, and common mistakes to avoid.
Let’s dig into how to grow Swiss chard rhubarb so you can enjoy colorful, nutrient-packed leaves all season long.
Why Grow Swiss Chard Rhubarb and When to Plant It
Before you start, it helps to know why you should grow Swiss chard rhubarb and exactly when to get those seeds in the ground.
1. It’s Not Rhubarb, But It Looks Like It
The reason people call it Swiss chard rhubarb is purely visual, those vivid crimson stalks mimic rhubarb’s appearance perfectly.
But unlike true rhubarb, the leaves and stalks of this chard are entirely edible and delicious.
So when you learn how to grow Swiss chard rhubarb, you’re actually growing a superfood that tastes like a milder, sweeter spinach.
2. The Best Time to Plant Seeds
To grow Swiss chard rhubarb from seed, wait until the soil temperature reaches at least 50°F, which usually means 2–3 weeks before your last frost date.
You can also sow seeds in late summer for a fall harvest, as this plant loves cooler temperatures.
For a continuous supply, plant a new batch every 3 weeks during the growing season.
3. Sun and Space Requirements
Swiss chard rhubarb grows best in full sun, but it tolerates partial shade, especially in hot climates.
Give each plant about 8–12 inches of space in rows spaced 18 inches apart to allow proper air circulation.
Crowding leads to smaller leaves and increases the risk of fungal diseases, so spacing matters.
How to Grow Swiss Chard Rhubarb: Soil and Planting Steps
Now let’s get into the actual process of how to grow Swiss chard rhubarb, starting with the ground beneath your feet.
1. Prepare Rich, Well-Draining Soil
Swiss chard rhubarb thrives in loamy soil packed with organic matter like compost or aged manure.
Work in a balanced fertilizer before planting to give your chard a strong start.
The soil pH should be between 6.0 and 7.0 for optimal nutrient uptake.
2. Sow Seeds at the Right Depth
Plant each seed about ½ inch deep and cover lightly with soil.
Keep the soil consistently moist until germination, which usually happens within 7–14 days.
Once seedlings have two true leaves, thin them to the recommended spacing.
3. Mulch to Retain Moisture
A 2–3 inch layer of mulch around your plants helps lock in moisture and keeps the roots cool.
This is especially important when you grow Swiss chard rhubarb in warmer regions.
Mulch also suppresses weeds that compete for nutrients and water.
Caring for Your Swiss Chard Rhubarb Plants
Once your plants are established, caring for Swiss chard rhubarb is mostly about consistent watering and feeding.
1. Water Deeply and Regularly
Swiss chard rhubarb needs about 1–1.5 inches of water per week.
Water at the base of the plant to keep leaves dry and prevent mildew.
During hot spells, check soil moisture more often, as drought stress makes leaves tough and bitter.
2. Feed With Nitrogen-Rich Fertilizer
Every 4 weeks, side-dress your plants with a nitrogen-heavy fertilizer like compost tea or fish emulsion.
This encourages lush, tender leaf growth and keeps those red stalks vibrant.
Avoid over-fertilizing, which can cause excessive leaf growth at the expense of color.
3. Watch for Pests and Diseases
Common pests include leaf miners and aphids, which you can control with neem oil or insecticidal soap.
Good airflow and proper spacing prevent most fungal issues like powdery mildew.
Remove any yellowing leaves promptly to keep your Swiss chard rhubarb healthy.
Harvesting and Storing Swiss Chard Rhubarb
The most exciting part of learning how to grow Swiss chard rhubarb is the harvest, so here’s how to do it right.
1. Start Cutting Outer Leaves Early
Begin harvesting when the plants are about 6–8 inches tall, usually 50–60 days after sowing.
Pick the outer leaves first, cutting them about 2 inches above the soil line.
This “cut and come again” method keeps the plant producing for months.
2. Continuous Harvest Tips
Never strip all the leaves at once; always leave at least 5–6 inner leaves intact.
The more you harvest, the more new leaves your Swiss chard rhubarb will produce.
If you notice flower stalks forming, cut them off immediately to redirect energy back to the leaves.
3. How to Store Your Harvest
Rinse the leaves, dry them thoroughly, and store them in a plastic bag in the fridge.
They’ll stay fresh for up to 5–7 days.
You can also blanch and freeze Swiss chard rhubarb for long-term storage.
So, How to Grow Swiss Chard Rhubarb Successfully?
How to grow Swiss chard rhubarb successfully comes down to timing, soil prep, and consistent care.
You plant seeds in cool weather, give them rich soil and regular water, and harvest leaves often.
This colorful vegetable is a true workhorse in the garden, providing beauty and nutrition from early spring to late fall.
Now that you know exactly how to grow Swiss chard rhubarb, you can confidently add it to your garden this season.
Enjoy the process, and happy gardening.