When to Plant Rhubarb in Saint Helens, Oregon (97051)

Location

Saint Helens, Oregon

ZIP Code

97051

USDA Zone

Last Frost

Sunday, March 15, 2026

📅 Planting Calendar

Start Seeds Indoors Sunday, January 18, 2026

Transplant Outdoors Sunday, March 29, 2026

Pro Tip: Start Rhubarb seeds indoors 8 weeks before your last frost date, then transplant outdoors around Sunday, March 29, 2026.

🌿 Plant Details

Scientific Name Rheum rhabarbarum

Days to Maturity 365 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 8-21 days

Ready to Plant Rhubarb in Saint Helens?

Get your seeds now so they're ready by Sunday, January 18, 2026.

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Growing Rhubarb in Zone 8b

Rhubarb (Rheum rhabarbarum) is a popular garden vegetable. In Saint Helens, Oregon, which is in USDA Hardiness Zone 8b, you should start seeds indoors around Sunday, January 18, 2026.

Your average last frost date is Sunday, March 15, 2026. Plan to transplant your Rhubarb seedlings outdoors around Sunday, March 29, 2026, about 2 weeks after your last frost date.