Location: Cache Valley, zone 4b, Irrigated, 9" rain in badlands.
posted 4 years ago
Out here in the desert, sunroots tend to grow in the wild in meadow areas that are just slightly dryer than what cattails like. I'd guess that the top of a hugel might be drier than their preferred habitat, so they might not grow all that robustly.
I have sunroot weed patches in my fields. I can kill them fairly easily if I pull them after the plants are about a foot tall, and before they start making new rhizomes. They don't travel around the garden, they pretty much stay where they got planted.
I think if you harvest heavily every season you should be able to keep the sunchokes somewhat under control. Just plant them in a sort of out of the way spot where they won't cause too much trouble and go for it. Worse comes to worse you can always just put a hot compost heap over the top of em and call it a day!