This is Oliver, he’s a real “connoisseur” of grass. It took about one month to grow this. Very simple: Fill cup with sand, press oat or wheat seeds in just below the surface. Mist and cover with plastic wrap. Set in the sun. When seeds sprouts, sprinkle a bit of potting soil over. Keep evenly misted. Picture 4 was after 2 weeks, 5 a week later, then finally 6 weeks.