Answer: Goldenchain trees (Laburnum) are generally in bloom from mid- to late-spring. I'm afraid their flower display will be gone before July. If you're looking for a substitute, Acacia constricta produces fragrant yellow flowers in the summer and the foliage is feathery and small. A second suggestion is Sapium, the Chinese tallow tree. This one produces spikes of tiny yellowish flowers in mid-summer. Best wishes with your wedding, and with your trees!
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