Every piece of root will grow . That is how you get nice long straight root . The more you harvest = the more you have grow .Guys, I may have just does something that starts the end of the world as we know it, but it was a step that had to be taken. I just had to.
The horseradish plant I set 5 years ago, which was 2 feet across at the ground and grew to 4 feet high and leafed out to over 5 feet across, had to be moved. It was going to end up on the north side of the hoop house and, in season, would rub the house and block the walkway. I had to move it. Just had to.
I never spread in its 5 years, just grew larger.
I moved it 4 feet from what will be the west wall of the hoop house. In the process I did divide it into 2 plants. My concern is the number of GIANT and normal roots I left in the ground in it's old hole. I'm afraid each one is going to take off in anger and start a new plant. There will be hundreds of them.
They will take over the world.
You might want to start banking water, stockpiling food, and sending your children off to live further out in the country before it's too late.