One Tree Rose Leafed Out, the Other Didn't: Checking Graft Viability

Two tree roses planted same day, same location, same care. One leafed out; the other has green trunk but no leaves.

Graft vs. Rootstock

Green trunk = rootstock (hardy base). The grafted top must show life. Scratch a top cane—green underneath? Cut a cane—green apple pith? If brown, the graft is dead. It should leaf out within 2 weeks of the other. Return if dead.