Help please

Help please

Observation - Help please - UK and Ireland. Description: Growing in a raised bed next to an unmarked stake. I know it's not the asparagus I planted but I can't remember what else it might have been that I planted two years ago. Then again it might be a weed. Horse Radish? About 2 feet tall. Can I eat it? :

Growing in a raised bed next to an unmarked stake. I know it's not the asparagus I planted but I can't remember what else it might have been that I planted two years ago. Then again it might be a weed. Horse Radish? About 2 feet tall. Can I eat it? :)