Need a great gift idea for someone with a little more than your average green thumb? The type of person who actually knows the ideal time to plant bulbs and loves to talk about the life cycles of herbs at parties? We’ve found just the thing. Local graphic designer (and self-confessed obsessive gardener) Bob Zeni has created The Obsessive Gardener Disorder Calendar, a fact-filled and beautifully designed piece that helps the obsessed track everything from optimal planting dates to average daily temperatures in Chicago. Plus it looks great on your wall or even flat on your desk, and it’s a steal at $10. The best part: your friend satisfies his inner botanist and you share in the wealth (who doesn’t love free veggies?) To see the calendar close-up and to order, check out the equally well-designed Web site here.