How to Grow Rhubarb 'Crimson Red' / 'MacDonald'
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Rhubarb 'Crimson Red' / 'MacDonald'
Rheum rhabarbarum
vegetableCrimson Red (also known as MacDonald) is a cold-hardy perennial rhubarb variety prized for its deep red stalks and excellent flavor. This cultivar produces tender, flavorful petioles with minimal fiber, making it ideal for cooking and preserves. Once established, a single plant can produce for 10-15 years with minimal maintenance.
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Example Rhubarb 'Crimson Red' / 'MacDonald' timeline · Pittsburgh, PA (Zone 6b)
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Plant Rhubarb 'Crimson Red' / 'MacDonald'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Rhubarb 'Crimson Red' / 'MacDonald'
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-7; prefers cooler climates with distinct seasons
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Establishment (Year 1)
4-6 monthsTransplants develop slowly with modest leaf growth; no flowering or harvest
Keep soil consistently moist; remove any flower stalks immediately; allow plant to focus energy on root development; apply thick mulch layer
Development (Year 2)
Full growing seasonRobust leaf growth; crown expands; may produce thin stalks and flowers
Remove all flowers to redirect energy; light harvest only (4-6 weeks maximum); maintain consistent watering; apply balanced fertilizer in spring
Productive (Year 3+)
8-10 weeks per seasonLarge, vigorous plant producing abundant crimson stalks; strong flower production
Full harvesting season (8-10 weeks); remove flowering stems immediately; divide crowns every 5-6 years; apply compost layer annually
Flowering
Late spring/early summer (ongoing removal)Tall flower stalks emerge from crown center with creamy-white flowers
Remove flower stalks at base to prevent seed production and maintain plant vigor; energy spent on flowers reduces stalk production
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Remove and destroy infested stalks; cultivate soil in spring/fall to expose larvae; use yellow sticky traps; apply neem oil as preventative
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Hand-pick early morning; use row covers on young plants; apply kaolin clay spray; use pheromone traps at perimeter
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Increase humidity through overhead watering; spray with water to dislodge; apply sulfur dust in cool weather; use insecticidal soap if severe
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Ensure excellent drainage; avoid overhead watering on crown; remove infected sections; apply copper fungicide to crown; improve air circulation
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and
Copper tape barriers around plant; hand-pick at dusk; use beer traps; apply diatomaceous earth; maintain drier foliage
Uses
Pies, Jams & Desserts
CulinaryCrimson Red's tender stalks and bright flavor are ideal for pies, jams, compotes, and crumbles. The deep red color creates visually appealing preserves without added coloring. Use in ratios with strawberries for classic spring desserts. [source]
Stewed & Preserved
CulinaryStew with sugar for sauce, compote, or syrup. Can be frozen or canned for year-round use. Superior fiber-free texture makes it ideal for refined cooking applications. [source]
Traditional Medicine & Digestive Support
MedicinalRhubarb root and stalks have been used in traditional Chinese and Ayurvedic medicine to support digestion. Contains compounds with potential laxative properties; consult herbalists before medicinal use. [source]
Natural Dye & Cleaning
HouseholdRoot produces pink/yellow dyes for textiles and crafts. Oxalic acid content makes it useful in natural cleaning solutions for rust and stain removal. [source]
Pollinator Support
WildlifeAllowing rhubarb flowers to bloom (selectively, on non-harvested plants) provides early-season nectar and pollen for bees and beneficial insects. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin light harvest in year 2; full harvesting starts year 3. Harvest from late spring through early July (stop by mid-July to allow crown recovery). Grasp stalks at base and pull/twist firmly—do not cut. Remove flower stalks immediately upon appearance. Never harvest more than 50-75% of stalks per season. Stalks are ready when thick and crimson red; younger, tender stalks have superior flavor.
Fun Facts
- 🌱 Rhubarb is botanically classified as a vegetable (the edible petiole/stalk) but culinarily treated as a fruit due to its tart, acidic flavor requiring sweetening.
- 🌱 The 'Crimson Red' cultivar was developed to produce stalks that remain deeply red even after cooking, unlike older varieties that turn pale.
- 🌱 Rhubarb leaves contain high levels of oxalic acid and are toxic if ingested in significant quantities; only the stalks should ever be eaten.
Gardening Terms
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