Green Thumb Nursery Lawn & Garden About Home of the nursery experts. Grower direct. Contact 1019 West San Marcos Blvd. San Marcos, California 92078 United States Get Directions Visit Website Coupon See the Coupon Offered by 20% Off Any One Plant 20% Get 20% off any one plant when you present this coupon. Must present this coupon at the time of purchase. Not valid with any sale items or with other coupons or offers. See ad for additional details.