Can you please advise on the best way to eradicate horseradish?

Jessica and John, Washington State, USA

A BOB SAYS Horseradish is not as difficult as convolvulus or equisetum to eradicate. True, it does have penetrating roots that rapidly reach all about, and can seem daunting because of its persistence.

Fortunately, it seldom spreads by seed (it can do so but does not often flower and set any), only from bits of the roots, and every tiny piece will regrow. I found putting the whole area down to grass, with regular mowing, eliminated a large clump in four years. In a vegetable bed

I just hoed it off each time any appeared. It only lasted into the third year. So, remove each leaf before it recovers the energy to make another and you will succeed.

However, the sauce is better than Japanese horseradish (wasabi). Also, the retted (bashed then soaked) stems make excellent fibres for plaiting into twine.

Horseradish can be useful in the kitchen but invasive in gardens