Technologies and methods for storing Jerusalem artichoke tubers

Jerusalem Artichoke Storage: Best Practices for Hot and Tropical Climates (India, Africa, KSA)

Jerusalem artichoke - also known as earth apple or sunchoke - is a hardy perennial from the sunflower family, growing up to 1.5 meters tall. While its bright yellow flowers resemble miniature sunflowers, its true value lies underground. The tubers, similar in appearance to potatoes, are rich in nutrients and especially high in inulin — a key ingredient widely used in the food and pharmaceutical industries.

One universal truth remains: growing the crop is only half the job - preserving it correctly is what guarantees profitability. To keep tubers firm, nutritious and market-ready all year round, proper storage technology is essential, especially in regions with hot climates.

Why Jerusalem Artichoke Is Challenging to Store

Jerusalem artichoke tubers have very thin skin and almost no sub-epidermal layer, which makes them highly sensitive to heat and dehydration. If they are not cooled immediately after harvest, they quickly lose moisture, nutrients and commercial quality.

Key Storage Methods for Jerusalem Artichoke (Sunchoke)

1. Field Storage (Only in Cool, Non-Freezing Climates)

In regions where winter soil stays cold but does not freeze, tubers may remain in the ground and be harvested as needed.
Important: Jerusalem artichoke is extremely sensitive to heat and direct sunlight — exposure leads to rapid spoilage.

2. Storage in Containers, Boxes or Ground Pits

Fresh autumn harvests are often packed into:

• containers

• boxes

• bags

• ground piles (approx. 3 × 1.8 × 1 m) with drainage gutters

If the daily temperature drops below –10 °C, piles must be covered with soil, peat or straw.

3. Trench Storage

This method requires:

• loading tubers in layers up to 1.5 m

• reliable supply-and-exhaust ventilation

Preventing self-heating is critical — once tubers begin to warm internally, spoilage becomes immediate.

4. Long-Term Storage in Vegetable Stores

For professional long-term storage, choose:

• dry, clean tubers (max 10% soil)

• only healthy, undamaged produce

After harvest, keep tubers outside for no more than 7 days if the air temperature exceeds 15 °C.

5. Extending Shelf Life with Paraffin Coatings

A practical lifehack: applying thin, non-toxic paraffin coatings significantly slows dehydration and keeps tubers visually attractive. This solution is popular for export-oriented farms.

6. Storage in Polyethylene Bags

Tubers are:

1. washed

2. dried

3. stacked in three layers

4. hermetically sealed

Bags (45–62 cm long) are placed into standard crates and stored at 2 °C. This method shows the lowest weight loss and minimal spoilage.

7. Cold Storage and Refrigeration

Professional cold stores keep Jerusalem artichoke up to 12 months at:

• 0–2 °C temperature

• ≤95% relative humidity

Loss Rates: What Farmers Should Expect

Depending on the method, total losses vary greatly — from 19% to 91%.

• Highest losses — vegetable boxes (natural weight loss up to 42.7%).

• Highest spoilage rates — bulk storage in containers (up to 35% damaged tubers).

• Highest sprouting — sealed plastic bags (around 5%).

• Lowest overall losses — polyethylene bags with controlled ventilation.

Most Efficient Method

The most labor-efficient and commercially reliable method is bulk containers with polyethylene liners, which reduce handling, minimize weight loss and optimize storage space.

For short-term storage (up to 3 months):
→ Unsealed plastic bags at 0–5 °C

For mid-term storage (up to 5 months):
→ Modified-atmosphere storage, which slows metabolism 4× and increases the output of marketable tubers 3×.

Best Practices for Quality Preservation

• Careful sorting

• Gentle loading

• Monitoring temperature and humidity

• Regular inspections for heating, rot or sprouting

These measures ensure long-term freshness and maintain inulin levels — crucial for food and pharma buyers.

Looking for Professional Storage Solutions?

Need a modern vegetable store or equipment for long-term Jerusalem artichoke storage? Our engineers design turnkey storage facilities optimized for hot climates in India, Africa and the Gulf region.

📞 Call: +971 50 437 7119
📧 Email: info@agrovent.com