Scorzonera likes dry and poor basic soils. Too much moisture, too low of a pH and too much fertilizer will kill the plant. So if you have a dry area in full sun with poor soil you may try and add some slacked lime to increase the pH and seed it there. I should note that around here it's endemic but only found from here (about 400m) up to 1,000/1,200m and only in isolated patches where growing conditions are right. Sometimes you see folks looking for it in the Fall at higher elevations but it's become a "forgotten food".
The reason you have issues with Jerusalem artichoke is humans cannot digest it in ordinary fashion and will pass straight through the stomach and the higher intenstine. It's only broken down by the bacteria present in the lower half of the intestine. If like me you have suffered of gastroduodenal ulcers (even if fully healed) it's a food that should be absolutely avoided.
Scorzonera is relatively rich in mannitol, especially if the Summer has been hot and not too dry. Mannitol is a laxative if consumed in large amounts but you would need to eat one large bowl of scorzonera to feel the Curse of Moctezuma.
