Bare Root Rhubarb Crowns: Planting Tips for Bountiful Harvests

Late winter is the sweet spot for planting bare root rhubarb crowns. I’ve learned that timing matters—get them in the ground 4-6 weeks before your last frost, and they’ll establish roots before the heat hits.

This method gives you a head start over potted plants. The crowns wake up fast, sending up those iconic red-green stalks by early spring. With proper care, you’ll harvest sturdy, tangy stalks in the first season.

What Youll Need

Instructions

Here’s the simple, time-tested method I use to get rhubarb crowns established and thriving for years.

Plant your bare root rhubarb crowns in early spring as soon as the ground is workable, or in early fall at least 6 weeks before the first frost. This timing allows roots to establish before extreme temperatures hit.

Select a spot with full sun (6-8 hours of direct sunlight daily) and well-draining soil. Rhubarb thrives in slightly acidic to neutral soil (pH 6.0-6.8). Avoid low-lying areas where water pools—soggy roots rot crowns quickly.

Dig a hole that’s 2 feet wide and 12-18 inches deep. Loosen the soil at the bottom and sides to encourage root spread. Mix in a 2-3 inch layer of aged compost or well-rotted manure to boost fertility.

Space holes 4-6 feet apart if planting multiple crowns—rhubarb needs room to expand. I always test drainage by filling the hole with water. If it doesn’t drain within 1 hour, pick a different spot or amend with coarse sand.

Soak the bare root crown in lukewarm water for 1-2 hours before planting to rehydrate the roots. Place the crown in the hole so the top of the bud (where new growth emerges) sits 1-2 inches below the soil surface.

Spread the roots outward and downward, then backfill with soil, pressing gently to eliminate air pockets. Water deeply with 1-2 gallons of water to settle the soil. You’ll see new growth emerge in 3-4 weeks if planted correctly.

Apply a 2-3 inch layer of organic mulch (straw or shredded leaves) around the crown, keeping it 2 inches away from the buds to prevent rot. Mulch retains moisture and suppresses weeds, which compete with young roots.

Water weekly, giving each plant 1-1.5 inches of water (including rainfall) for the first growing season. The soil should stay evenly moist but not waterlogged. If leaves wilt in the afternoon, it’s a sign to water more deeply.

Resist the temptation to harvest stalks during the first year. Let the plant focus all its energy on root and leaf growth. You’ll know it’s ready for light harvesting in the second year when stalks reach 12-18 inches long.

By the third year, your rhubarb will produce bountiful harvests. I wait until the stalks are thick and firm before pulling—thin stalks indicate the plant still needs more time to mature.

Tips and Common Mistakes

Small details make the difference between a struggling plant and a thriving rhubarb patch.

Timing Secret: Planting in early spring or early fall with that 6-week buffer before frost gives roots the perfect window to establish. I learned the hard way that rushing this timeline leads to weak plants that never quite take off.

Soil Prep Matters: That 2 feet wide by 12-18 inches deep hole might seem excessive, but rhubarb roots spread wide and deep. The drainage test in Step 2 is non-negotiable—if water doesn’t disappear within 1 hour, you’ll regret skipping this check when rot sets in.

The Soaking Step: Don’t skip soaking the crowns in lukewarm water for 1-2 hours before planting. This rehydrates the roots after their journey and gives them a head start. Between us, I’ve seen unsoaked crowns take twice as long to show new growth.

Watering Wisdom: The first growing season demands consistent moisture. When you’re giving each plant 1-1.5 inches of water weekly, remember that afternoon wilting is your plant’s way of saying it needs more. Deep watering beats frequent light sprinkles every time.

Frequently Asked Questions