About Jerusalem artichoke
A knobbly edible tuber of a tall sunflower. Vigorous and invasive: every tuber piece left in the soil regrows.
Depth and spacing
Typical range: 10-15 cm deep and 30-40 cm apart. A general rule is to plant at two to three times the height of the tuber; check the label for your variety. The drawing is to scale for 12.5 cm deep and 35 cm apart (the size of the organ is illustrative); try your own measurements.
When to plant
Plant in spring. Plant: 4 weeks before up to your last spring frost. These are rules of thumb for the northern hemisphere. Enter your frost dates for real dates.
Dividing and propagating
Cut tubers with at least one bud and plant in early spring.
Lifting and storing
Lift as needed over winter; they keep poorly out of the ground.