Our Mystery Plant ("Spiny sow-thistle”, Sonchus asper) is one of them. It’s an annual, growing quickly, getting to be a couple of feet tall, branching toward the top. From the picture you have ...

The lobes in each leaf of prickly sow thistle do not tend to cut in so close to the midrib of the plant as in sow thistle leaves. It could also perhaps be confused with hawksbeard due to its leafy ...

Additionally, you'll also need to be sure that this thistle has well-drained, sandy soil. The soil can range anywhere from dry to moist. You can sow the seeds of this plant in the fall or the ...