Are you out looking for signs of spring?  Perhaps spring bulbs poking through the earth, fuzzy catkins on pussywillow branches or spidery-like blooms on witch hazel shrubs?  Well, step inside a Midwestern expo center's home and garden show where you'll find blooming gardens filled with a bounty of ideas for the upcoming growing season. The St. Louis Builders Home & Garden show kicks off the season with its 35th annual show and its returning water-animated "Living Fountain" that transforms into a female statue. The Central Ohio Home & Garden show will spotlight outdoor living with 10 themed gardens.  And, the three of us will be discuss "Midwest Gardening Trends" at 3 p.m. on Sunday, March 3.  At the Chicagoland Flower and Garden Show, look for Pop Art-styled floral designs, artful landscapes and a horticulture photo display set among graffiti murals at this year's "Art of Gardening" event.  Check out these links for more info: