After Labor Day is a great time to plant many things. The risk of heat stress is reduced and, because evaporation is generally less of a problem, watering is easier. Also, in the fall most plants are not putting much energy into growth of branches, stems, flowers, or foliage; thus, their energy can be applied to establishing roots.
With spring in the air in Central VA, your green thumb might be ready to start working in the dirt. But it may not be a good idea to start digging without a plan. Just because flowers and vegetable plants are available at nurseries doesn’t mean you can plant them all at any time. In addition, some plants require certain preparations so they can thrive when it comes time to put them in the soil.