Knott’s Scary Farm Haunt coupons and discounts will help visitors save money on the cost of admission tickets. Knott’s Scary Farm opens on September 24th and is open for a month, through Halloween. The 160 acre attraction is described as a “living horror movie” with mazes, shows 3 “scare zones” and 1,000 monsters on the loose. The tickets cost over $50 unless you take advantage of the pre-sale prices, Knotts Scary Farm coupons and discounts.