Big mistake

They’re not too easy to get rid of.

How to Control Jerusalem Artichokes
Jerusalem artichoke develops new shoots only on tubers formed the previous year. It may seem logical that Jerusalem artichoke weeds should be easily controlled by simply digging the tubers, but, unfortunately, things are not that simple because locating all of the tubers, which grow on long stolons, is nearly impossible. A more effective way of managing Jerusalem artichoke weeds is to pull the young plants as soon as they emerge in spring– preferably when they are about 4 to 8 inches (10-20 cm.) tall. If you have a large patch of Jerusalem artichoke or if the plants are sprouting in your lawn, you can mow them down. Either method works because new tubers are unable to develop without the above-ground shoots. However, total Jerusalem artichoke control requires you to be super vigilant and remove every single sprout.

Read more at Gardening Know How: Jerusalem Artichoke Weeds: How To Control Jerusalem Artichokes https://www.gardeningknowhow.com/edible/vegetables/jerusalem-artichokes/jerusalem-artichoke-weeds.htm

Loads of wind, could have had a competition with OH.
I read that winter savoury could aleviate the gas situation
Thanks Aunty for the information