Any time after you play a card, Rugwort gets to play a card. If you played a Meadow card, first replenish the card.
To play Rugwort’s card, roll the 8-sided die; the number rolled will determine which of the 8 Meadow cards Rugwort gets to play into his city. The cards are numbered 1-8, with the top-left being 1 and the bottomright being 8. For Rugwort’s city, place his cards in stacks according to color types so you can clearly see how many he has of each color. The card’s ability and point value do not matter. Replenish the Meadow card after he has played his card.