🌸 When to Plant Rhubarb

When should I plant rhubarb?

Plant rhubarb outdoors 2 weeks before last frost.

Is rhubarb frost sensitive?

Rhubarb can tolerate light frost, surviving temperatures as low as 20°F. This makes it a great candidate for early spring or fall planting when other crops can't go out yet.

What temperature does rhubarb need?

Rhubarb grows best between 40°F and 75°F. It can survive down to 20°F, but growth slows significantly below 40°F. It prefers cool weather and may bolt or stop producing if summer heat arrives early.

How long does rhubarb take to grow?

Rhubarb typically takes 365–730 days from transplant (or direct sow) to first harvest. This is a long-season crop — start seeds early enough to ensure harvest before your area's first fall frost.

Is it too cold to plant rhubarb?

It is too cold to plant Rhubarb outdoors when nighttime temperatures are falling below 20°F. While Rhubarb can tolerate temperatures as low as 20°F, growth will be slow until nights consistently exceed 40°F. Use CanIPlant to check your local 7-day forecast and get a real-time answer for your ZIP code.

Is it too hot to plant rhubarb?

Rhubarb starts to struggle when temperatures climb above 75°F. As a cool-season crop, Rhubarb is especially heat-sensitive — high temperatures cause bolting, bitter flavor, or complete crop failure. Avoid planting in the peak of summer and opt for spring or fall instead. CanIPlant checks your local forecast highs to flag this automatically.

Any tips for growing rhubarb?

Do not harvest in the first year. Leaves are toxic — eat stalks only. Thrives with cold winters.