Stachys affinis (crosnes, Chinese artichokes)

🌿 Rare Find: Featured in our curated Rare & Uncommon Garden Plants Collection. Limited availability.

Chinese Artichoke (Crosnes) — Stachys affinis is a rare perennial vegetable grown for its crisp, delicately flavored edible tubers and its surprisingly easy, productive nature. Sometimes called knotroot or Japanese artichoke, this specialty edible is prized by chefs and gardeners alike for its mild nutty flavor, satisfying crunch, and dependable harvests during the cooler months, when fresh garden vegetables are often scarce.

Underground, plants form pale, finger-sized tubers with a distinctive knobby shape that looks almost sculpted. Above ground, they grow into tidy green mounds about two feet tall, quietly producing their crop beneath the soil until harvest season arrives in late fall and winter.

Flavor is subtle and versatile. It’s lightly sweet, faintly earthy, and pleasantly crisp. They hold their texture beautifully when sautéed, pickled, or steamed, making them a favorite in Asian and European cuisine and a standout ingredient for cooks who love discovering something new.

Why Grow Chinese Artichokes 

• True rare edible — difficult to find in nurseries
• Perennial harvest crop — returns yearly from tubers
• Winter harvest window — fresh food when gardens are quiet
• Chef-valued ingredient — delicate flavor + excellent texture
• Highly productive — multiplies underground each season
• Container friendly — easy to manage growth

Growing Details

• Botanical name: Stachys affinis
• Plant type: Herbaceous perennial vegetable
• Height × Width: ~2 ft. × 2 ft.
• Sun: Full sun to partial shade
• Soil: Loose, fertile, well-drained soil
• Water: Moderate; prefers consistent moisture
• Hardiness: USDA Zones 5–9
• Growth habit: Spreading by underground tubers

Planting & Harvest Guidance (Grower Tips)

Plant in loose soil or raised beds so tubers develop straight and harvest easily. Harvest begins after frost when foliage dies back; simply dig what you need and leave the rest in the ground for later. Tubers store best refrigerated in slightly damp soil or sand to maintain crispness.

Managing Spread (Simple + Worth It) 

Chinese artichoke spreads by underground tubers, which is what makes it so productive. The easiest way to manage it is intentional placement: 

Best grown in

• large containers
• raised beds
• dedicated edible plots

Thorough harvesting keeps growth contained.

Culinary Uses

A favorite among chefs and adventurous cooks, crosnes shine in: 

• quick sautés
• pickles and ferments
• stir-fries
• roasted vegetable medleys
• winter vegetable dishes

Is This Plant Right for You?

This is an excellent choice if you:

• enjoy unusual or gourmet edibles
• like productive, low-effort crops
• want winter harvests
• grow in containers or raised beds
• appreciate rare garden finds

A Grower’s Note

Chinese artichokes are one of those plants people try once and then keep forever. They’re interesting, generous, and surprisingly easy to grow, which is exactly the kind of edible that makes gardening feel a little more magical.