Vegetable Oyster Approx 100 seeds per pack. Tragopogon pratensis The Seed Site Tragopogon pratensis could be mistaken for any other yellow dandelion type flower at first glance but a closer look will be enough to identify it. The flowers are. Salsify Baker Creek Heirloom Seeds Tragopogon porrifolius A European favorite known in Roman times and cultivated since at least the Thirteenth Century. Sow 8221 deep in very early spring. How to Grow Salsify Vegetable plants Tragopogon Porrifolius seeds Salsify is an old fashioned root crop that is not commonly grown in home vegetable gardens. How to Grow Salsify Roots Salsify is slow growing yet it an easy to grow root crop.