This is such a great weekly newsletter for the Midwest and Plains states because it gives timely information and advice -- all research based and about as reliable as you will find anywhere. K-State is one of the land-grant universities that operates the Extension and Master Gardeners' programs throughout the US. You can subscribe for free and every week, you will know what problems are emerging (if you're in the center of the country) and what to do about them.
Horticulture, Forestry and Recreation Resources - Extension>Horticulture Info Center>-Hort Newsletter
Other Extension offices probably produce their own regional newsletters, so check with your Extension agent locally.