New to gardening. Got this weed that is growing like wildfire. The speed is immense, and the defensive spikes/thorns it grows are intriguing. Just wondering what it is so I can do some research on prevention. Picture attached. Any help greatly appreciated. James
This took me a bit! It's a Common Teasel.
https://www.gardeningknowhow.com/plant-problems/weeds/controlling-teasel-weeds.htm