Hog weed are very difficult to eradicate from your garden. Have recently received a tip that worked after a few attempts: Cut off the leaf and sprinkle with coarse sea salt in the hollow stems. My garden is now hog weed-free.
Buy a few liters of vinegar, it stinks so its best to do it in the evening. It needs to be dry for 3 hours though. the weed dies in 1 and a half hour, afterwards remove it and you will be fine for the rest of the year.
My grandmother fought weeds and moss between the stones of the terrace behind her house with boiling water.
Be careful with the hog weed!
This causes brown spots on your skin..