I bought a dormant clematis vine the beginning of April and planted it on the 5th. It is a H.F. Young variety, and has lovely lavender blooms if it is alive. We had a few late frosts after I planted it. Everything else in my yard is recovering nicely. However, there has not been the slightest sign of growth. I can get my money back if it is dead, but wondered how long should I wait for it to sprout? It is supposed to be planted between March and June 1st in my area. I am in zone 6b in Missouri. I have planted clematis vines before and those never grew either, even though they are quite popular in this area.