Is it a “weed?” You may have seen it by a roadside or in some disturbed area. A basal rosette of thin, iris-like leaves and knee-high stalks bearing composite flowers with spiky green sepals behind the purple rays. It’s a biennial, with just the rosette in the first year.
Once you know it, it’s unmistakeable. It is purple salsify, also known as oyster plant or Jerusalem star, Tragopogon porrifolius, native to Mediterranean Europe and now found all across the US. It is a beautiful herb that is edible and full of good nutrients.
There is another plant called salsify. It is black salsify, Scorzonera hispanica, more commonly grown for food in Europe, but I have not seen it in our area. It has wider leaves and looks a bit like broadleaf plantain or dock.
While it can be invasive if it is not controlled, purple salsify is fortunately easy to clear. Pull out all the rosettes, using a weeder or other long, sharp tool to cut the root. Most plants won’t come back if you cut deeply enough.
Those lovely flowers may not last long in our gardens because they are edible. Even the leaves and flower stems are edible, but the real prize is the crisp, carrot-like root, which has a nutty, earthy flavor something like oyster. The best time to harvest the root is just as the first flowers open. After that the root begins to become woody and loses its nutrient value.
Purple salsify spreads by releasing large dandelion-like, windblown seeds, so the responsible thing to do is deadhead any flowers you don’t eat. Or you can do what I do… cut that seed head as soon as it matures and save the seeds for planting as food plants in containers. Be sure the container is deep enough for the delicious root!
There is no place for purple salsify in a California natives-only garden, but this is one of those “friendly invasives” that we sometimes allow in controlled deep nature ecosystems. Like many other aliens, it must be carefully limited or it will spread. If you can’t keep it limited, remove it completely!
But with its edible roots and flowers and its simple, elegant beauty, it is one of those aliens we love to grow in safe, escape-proof containers.