MacDonald

Family: Polygonaceae Vegetable

Sink your spoon into MacDonald rhubarb for a bright, tart snap followed by a clean, juicy sweetness that lingers on the palate.

Stalks are richly colored—deep rose to cranberry at the surface with a tender, crisp interior—ideal for turning simple harvests into vivid, rosy results. Grow MacDonald for dependable, full-season performance and a garden-to-table centerpiece that looks as good as it tastes.

Light: Full SunMaturity: 365 DaysHabit: Perennial_Crown

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Growing note: Zone 6b has only 174 frost-free days — shorter than this crop's 365-day maturity. Outdoor planting is not viable; use protected cultivation.

Milestone	Date
Last Frost	Apr 25th
Growing Approach	Protected Environment Only

Crop Details

Trait	Value
Days to Maturity	365
Sun Requirements	Full Sun
Growth Habit	Perennial_Crown
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	40
Min Night Temp (°F)	35
Harden Off (days)	5

Culinary Notes

Chef's Note

MacDonald rhubarb brings a crisp bite and a high-torque tartness that stays lively through a quick simmer, so it doesn’t collapse into flat, pink water. It’s made for desserts that want a clean acid line—think rosy compotes and fast pies—where the sweetness arrives right after the snap.

Best Uses

macarons/crumbles where the tartness needs a clean sweet counterpunch
stewed rhubarb for spoonable compote that holds shape without turning to jammy mush
pie filling with a short simmer to keep the stalks lively and jewel-toned
quick-roasted rhubarb to concentrate color and gloss for yogurt or ice cream

Flavor Profile

bright, tart snap crisp-tender stalk texture juicy sweetness that lingers rosy, almost berry-like acidity

Kitchen Pairings

strawberry vanilla honey orange zest ginger custard or cream

Frequently Asked Questions

What are common pests or diseases on Rheum rhabarbarum (rhubarb), and how can I manage them?

Rhubarb commonly suffers from crown rot (often from overly wet, poorly drained soil) and leaf spot/gray mold during damp weather. Remove and destroy infected leaves, keep the crown dry by avoiding overhead watering, and improve drainage with compost plus a mulch that doesn’t sit against the crown. If leaf spot keeps recurring, thin crowded growth for airflow and consider removing any heavily affected stems early in the season to reduce spores.

How often should I water Rheum rhabarbarum during its main growing phase?

During active growth, keep the soil consistently moist but not soggy—aim for about 1–1.5 inches of water per week depending on rainfall and heat. Water deeply to wet the root zone, then let the top 1 inch of soil dry slightly before watering again to protect the crown from rot. Mulch helps stabilize moisture, but avoid piling mulch directly onto the crown.

How do I tell when Rheum rhabarbarum stalks are ready to harvest?

Harvest when stalks are firm and fully colored (typically from late spring through early summer), and they reach roughly 10–15 inches long depending on plant size. Pick by pulling or snapping individual stalks at the base rather than cutting, taking only a portion of the plant’s stalks so it keeps producing. Stop harvesting if stalk growth slows or temperatures remain very hot, and don’t harvest the first season from newly planted crowns.

MacDonald

Planting Schedule

Crop Dates

Crop Details

Culinary Notes

Frequently Asked Questions