Zone 7 generally offers a wide growing season being in the middle of the extremes. You can grow a wide variety of flowers, shrubs, vegetables, and fruits. The most important factor is understanding which plants can tolerate frost and cooler months in this zone to be successful.
Mid-October is the typical time-frame, but can go as late as first week in November.
Mid-April is the typical time-frame, but at times it can go up to as laste as first week of May.