best planting time for zone
Lilac, honeysuckle and most species of hydrangea sold at local nurseries are hardy in North Oakland County. If you want to plant them now, purchase dormant plants (they don’t have leaves yet) and plant them as soon as you can work the ground. If the plants at the nursery have new growth on them and you plant them in your garden now, they may suffer damage from spring frost. Also, nurseries often receive plants from more southern locations where the plants already have more leaves on them. When you’re ready to purchase your plants, be sure to ask the nursery if the plants you’re purchasing are “hardened off” and are ready for our Michigan spring weather. As for the jasmine groundcover, I suspect you may be referring to Asiatic jasmine groundcover, Trachelospermum asiaticum, sometimes sold at box stores. This plant is not hardy in Michigan. Here is more information on this plant: http://gardeningsolutions.ifas.ufl.edu/plants/ornamentals/asiatic-jasmine.html Perhaps the plant you are referring is vinca or periwinkle, Vinca minor, which is very hardy here. Here is more information on vinca to help determine which plant you are referring to: http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=u760 Please let us know if you need additional assistance.