Blake Shelton and Gwen Stefani will not be sending save the date cards anytime soon! According to a source, the duo is struggling to agree on a wedding day. The songstress, 51, is “pushing hard” for their first ceremony on Shelton’s Oklahoma ranch to take place in early fall — as previously reported, the two are also planning a second affair in L.A. — but the country singer, 44, who has been vocal about his impatience, wants to wed this summer. However, there’s a problem: tornado season. The chapel he had constructed on his property for Stefani, a devout Catholic, “isn’t built to withstand even a minor wind event,” warns the source. No matter what though, the pair (who are also trying for a baby via surrogate, as Us revealed)…
