William Bronson wrote: Do they hold their leaves overwinter?
Sea Skinley wrote:Two questions for you experienced types:
1. How deep would a root barrier around a horseradish area need to be? More than 12"? More than 24"?
2. Does spreading kill other plants (what does it *not* kill?) or is it more of an annoyance, popping up where you don't want it (for whatever reason)?
For context, I have red clay and rock soil, so it sounds like aggressive spreading will be somewhat retarded by conditions. I planted some a few years ago in buried (large water bottle sized) containers and nothing came back the 2nd year. Now I have two in grow bags doing all right this year, and one in the ground that has kind-of died back in our driest weeks but seems to be surviving now.
We have several areas that we call "rock planters", where we build up on a slope for this or that. I'm thinking of creating something like that with root barrier, and using it for horseradish and whatever else. Can garlic grow with horseradish, for example?
More than 2 questions, really, but primarily interested in more specifics on requirements to contain it (to the extent feasible) and experience with plants it kills by proximity (if relevant).