Rhubarb Supreme Certified Organic

SKU: SW764
We are excited to offer as organic seed this improved Rhubarb type with excellent bolt resistance. Rhubarb Supreme has large, dark green savoyed leaves that provide a striking contrast to its bright red stems and veins. Read More

Exposure Full Sun to Partial Shade

Matures in 60 days

Season Cool Season

Seed type OP, Organic ?

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New for 2025
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Rhubarb Supreme Certified Organic

Product Details

We are excited to offer as organic seed this improved Rhubarb type with excellent bolt resistance. Rhubarb Supreme has large, dark green savoyed leaves that provide a striking contrast to its bright red stems and veins. A robust variety that produces healthy full-size bunches spring through fall. Rhubarb Supreme is the best red Swiss chard to choose for growing during the heat of summer.

Quick Facts:

    • Organic seed.
    • Improved red Rhubard type.
    • Excellent bolt resistance.

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Rhubarb Supreme Certified Organic

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All About Rhubarb Supreme Certified Organic

Latin

Latin
Beta vulgaris var. cicla
Family: Amaranthaceae

Difficulty

Difficulty
Easy

Season & Zone

Season & Zone
Season: Cool season
Exposure: Full sun

Timing

Timing
Direct sow any time from early spring to mid-summer. Chard is moderately winter hardy and may perform into the following spring where winters are mild. Optimal soil temperature: 10-30°C (50-85°F). Seeds should sprout in 7-14 days.

Starting

Starting
Sow seeds 1cm (½”) deep, spaced 10-30cm (4-12″) apart in rows 45cm (18″) apart.

Days to Maturity

Days to Maturity: From direct sowing.

Growing

Growing
Ideal pH: 6.0-6.5. Swiss chard prefers loose, deep, and fertile soil that is rich in organic matter. Plenty of consistent moisture is required, especially as plants grow larger. It grows best in full sun, but will tolerate light shade in summer. A liquid fertilizer or compost tea applied twice during summer will keep chard growing well.

Harvest

Harvest
For salad mix, seed more densely and cut as baby leaves. Cut individual mature stalks using the large outer ones first.

Seed Info

Seed Info
In optimal conditions at least 75% of seeds will germinate. Usual seed life: 3 years. Per 100′ row: 220 seeds, per acre: 64M seeds.

Companion Planting

Companion Planting
Beans, Brassicas, and onions make the best companions for chard.

More on Companion Planting.

How to Grow Swiss Chard

Step 1

Timing

Direct sow any time from early spring to mid-summer. Chard is moderately winter hardy and may perform into the following spring where winters are mild. Optimal soil temperature: 10-30°C (50-85°F). Seeds should sprout in 7-14 days.

Step 2

Starting

Sow seeds 1cm (½”) deep, spaced 10-30cm (4-12″) apart in rows 45cm (18″) apart.

Step 3

Growing

Ideal pH: 6.0-6.5.

Swiss chard prefers loose, deep, and fertile soil that is rich in organic matter. Plenty of consistent moisture is required, especially as plants grow larger. It grows best in full sun, but will tolerate light shade in summer. A liquid fertilizer or compost tea applied twice during summer will keep chard growing well.

Step 4

Germination

Days to Maturity: From direct sowing.

In optimal conditions at least 75% of seeds will germinate. Usual seed life: 3 years. Per 100′ row: 220 seeds, per acre: 64M seeds.

Step 5

Harvest

For salad mix, seed more densely and cut as baby leaves. Cut individual mature stalks using the large outer ones first.

Tips

Companion Planting

Beans, Brassicas, and onions make the best companions for chard.

Customer Reviews & Questions