How to Overwinter Jerusalem artichoke
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Jerusalem artichokes withstand cold and can remain in the soil until harvest.
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Mulch is crucial for shielding tubers from harsh winter cold.
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Appropriate storage prevents Jerusalem artichoke tubers from dehydrating over winter.
The Importance of Overwintering Jerusalem artichoke
Why Overwinter Jerusalem artichoke?
Jerusalem artichokes are perennial plants that form tubers and require proper care to thrive annually. Overwintering is vital for ensuring your plants return healthy and robust for the subsequent growing season. This process safeguards the tubers from harsh winter conditions, diseases, and pests. By dedicating time to overwinter your Jerusalem artichokes, you can anticipate a plentiful harvest and strong growth the following year.
Preparing Jerusalem artichoke for Winter: Key Steps
Tuber Harvesting
Start by carefully unearthing the Jerusalem artichoke tubers with a garden fork or spade. Gently lift them from the soil to prevent damage. Harvesting can be done gradually, meaning you don't have to collect all tubers at once. Tubers left in the ground can stay there until needed, as Jerusalem artichokes are frost hardy.
Stem Pruning
After harvesting the tubers, trim the plant stems to approximately 15â20 cm (6â8 inches) above the ground using garden shears or pruners. This step helps redirect the plant's energy to the tubers and prevents decaying stem material from affecting the tubers over winter.
Soil Mulching
Mulching is a crucial step in overwintering Jerusalem artichokes. Apply a thick layer of organic mulch, such as straw, leaves, or compost, over the soil where the tubers remain buried. Aim for a mulch depth of at least 15â20 cm (6â8 inches) to insulate the tubers from freezing temperatures. This ensures they remain protected and viable for replanting.
Indoor Storage of Jerusalem artichoke Tubers
Selecting the Right Storage Container
If you choose to store some tubers indoors, select an appropriate container that allows for adequate air circulation. Wooden crates, slatted bins, or even breathable fabric bags are excellent options. The key is to avoid airtight containers, as tubers need to 'breathe' to prevent mold and rot.
Optimal Storage Conditions
Store your Jerusalem artichoke tubers in a cool, dark place with consistent temperatures between 0-4°C (32-40°F). A root cellar, basement, or unheated garage can serve as ideal storage locations. Ensure the storage area is well-ventilated and maintains a humidity level of around 85-95% to prevent the tubers from drying out. Regularly inspect the tubers for signs of spoilage and remove any that show rot to protect the rest of the stored crop.
