One of the best places to get your garden questions answered is at the annual gathering of local Master Gardeners, gardening professionals, and horticultural consultants at Harvest Day, held the first Saturday of August each year at the Fair Oaks Horticulture Center in Sacramento County, California. And last Saturday was no exception. A question I posed to several dozen of the pros there was this: “What is the one garden tip you would like people to know?” Here’s their answers. Previous...