Growing Rhubarb in Zone 3B

Rhubarb is one of the few true perennial vegetables, returning every spring for 10-15 years. Patience is required — don’t harvest in year one.

Zone 3B has a short growing season — start seeds indoors when possible and use season-extending techniques like cold frames and row covers.

Top Growing Tips

• Never eat the leaves — they contain oxalic acid and are toxic
• Do not harvest any stalks the first year; take lightly the second year
• Red varieties tend to be sweeter and less tart than green ones
• Divide clumps every 4-5 years to keep production vigorous
• Mulch heavily in fall to protect the crown over winter

Companion Planting

Good companions: strawberries, garlic, onions

Avoid planting near: dock, knotweed (same family)

Harvest Timeline

Year 3+ — pull stalks when 12-18 inches long; stop harvesting after early summer

About Zone 3B

USDA Hardiness Zone 3B has an average last spring frost around May 15 and first fall frost around Sep 15. All planting dates above are calculated from these frost dates. Your specific location may vary — check with your local extension office for the most accurate dates.