Introduction
Rhubarb is a long-lived perennial grown for its thick, tart stalks. Once established in a suitable climate and site, a healthy crown can return for many seasons.
The main goals are simple: give the crown good drainage, enough room to grow, reliable moisture, and time to establish before heavy harvest begins.
Choose a Good Site for Rhubarb
Rhubarb prefers a permanent location where the crown will not be disturbed every season. Choose a site with good drainage and enough room for the plant to form a large clump.
Sun needs can vary with climate. In cooler regions, strong sun may work well. In warmer areas, protection from intense afternoon heat may help reduce stress. Use regional guidance when adapting the crop to marginal climates.
Prepare the Soil
Before planting, loosen the soil and remove perennial weeds. A soil test can help identify pH or nutrient problems before the crown is established.
Well-finished compost can be added where it improves soil structure and organic matter. Avoid planting into a waterlogged site or burying the crown in a dense, poorly drained pocket.
How to Plant Rhubarb Crowns
Follow the current Grow Organic product instructions for planting depth and spacing. Keep the crown’s growing point positioned according to the current planting guidance rather than burying it deeply by default.
Water after planting to settle soil around the roots. Keep the soil evenly moist during establishment but avoid saturated conditions.
Give the Crown Time to Establish
A newly planted rhubarb crown needs time to build a large root system. Avoid taking a heavy harvest immediately after planting.
The exact first-harvest timing depends on crown size, vigor, climate, and horticultural guidance. When regular harvest begins, remove only enough stalks to leave plenty of healthy growth on the plant.
How to Harvest Rhubarb
Harvest firm stalks when they reach a useful size for the variety and season. Follow the current Grow Organic method for pulling or cutting stalks.
Stop harvesting when the plant needs to rebuild energy for the rest of the season. Weak or stressed plants should be harvested more lightly.
Important Rhubarb Safety: Do Not Eat the Leaves
Rhubarb is grown for the stalks. The leaves should not be eaten because they contain compounds that can be harmful.
Do not use the leaves as food or animal feed.
Watering Rhubarb
Rhubarb benefits from consistent moisture, especially while establishing and during active growth. Water deeply enough to reach the root zone, then allow excess water to drain.
Mulch can help conserve moisture and reduce weeds. Keep heavy wet mulch from covering the crown in a way that encourages rot.
Feeding Rhubarb
Use soil testing and plant performance to guide fertilizer decisions. Excessive fertilizer is not automatically helpful.
If fertilizer is needed, follow the product label and regional recommendations.
Flower Stalks and Plant Energy
Mature rhubarb plants may send up flower stalks. Many gardeners remove them so the plant can focus more energy on leaf and crown growth.
Flowering can be influenced by age, variety, weather, and stress. It is not always a sign that the plant is unhealthy.
Dividing Older Rhubarb Crowns
Large, crowded crowns may eventually benefit from division. Division is also a way to propagate an established plant.
Timing varies with climate, but the plant is usually divided while dormant or during a low-stress period. Use current regional guidance for the best timing in your area.
Growing Rhubarb in Smaller Spaces
For space, drainage, and watering considerations in a smaller garden, read Growing Rhubarb in Raised Beds and Containers.
Shop Rhubarb Crowns
Browse Grow Organic’s Rhubarb Crowns collection for current varieties, availability, and product-specific planting guidance.