Jerusalem Artichoke

Family: Asteraceae Vegetable

Honeyed, nutty-sweet flavor with a tender, crisp bite—Jerusalem Artichoke forms knobby, globe-like tubers that roast up beautifully and develop a caramel depth.

The flesh is pleasantly firm and earthy, with a subtle artichoke-like character that shines in hearty preparations and savory preserves. Grow this vigorous, late-season favorite for a dependable harvest at about 90 days and a pantry-worthy bounty from one sturdy planting.

Light: Full SunMaturity: 90 DaysHabit: Clumping

Botanical illustration of Jerusalem Artichoke

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

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Jul 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Clumping
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	65
Min Soil Temp (°F)	50
Min Night Temp (°F)	35
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

This is the tuber that rewards brute heat: roast it hard and it turns honey-nutty and deeply caramel at the edges while keeping a pleasantly firm crunch. Its faint artichoke vibe loves butter, garlic, and lemon—build your seasoning around that roast-and-citrus contrast.

Best Uses

high-heat roasting until deeply caramelized at the edges
thin shaved salad or slaw with acidic vinaigrette for snap
pan-seared coins for a nutty, caramel crust
slow-simmered soups or purees with stock and butter

Flavor Profile

honeyed nutty sweetness firm, crisp-tender bite earthy, faintly artichoke-like character roasty caramel notes when browned

Kitchen Pairings

lemon garlic butter thyme parmesan chicken stock

Frequently Asked Questions

What pest or disease most often affects Cynara scolymus (Jerusalem artichoke) and how can I manage it?

Powdery mildew is a common problem on Jerusalem artichoke, especially during warm, humid spells. Improve airflow by spacing plants well and avoid wetting foliage; if you see spreading white patches, remove heavily affected leaves and treat with a sulfur-based fungicide according to label directions. Also remove volunteer shoots from earlier cycles, since infected debris can reintroduce the disease.

How often should I water Jerusalem artichoke during peak growth, and what soil moisture level should I aim for?

During the main growth phase, water deeply so the top 6–8 inches of soil stay evenly moist, typically about once per week depending on your rainfall. Let the soil start to dry slightly between waterings—consistent sogginess around the tubers increases rots. Mulch helps stabilize moisture without keeping the crown constantly wet.

How do I tell when Jerusalem artichoke is ready to harvest?

Harvest when plants finish putting on new growth and the foliage starts to yellow and die back, usually around 90 days after planting, but often later in cooler climates. Use a garden fork to lift tubers carefully—do not cut them with the spade—since damage can cause storage rots. For best flavor, leave tubers in the ground until after the first light frosts, then harvest before the ground freezes solid.