weed and feed and tomatoes

[augiedog55]

I'm going to plant three tomatoes for my neighbor thats in a wheel chair. I asked if he used any weed and feed on his yard. He said he puts weed and feed on in march. If i plant tomatoes in his side yard in late may will it be safe or will the weed and feed put down 3 months before kill the plants? If so I won't waste my time or tell him not to apply any on thast side of his house.
Thanks Bruce