Blossom Set spray

I got some blossom set spray for my tomatoes I wonder will it help my buds get bigger? outdoors for now.

I have wondered this also. I think that it may. Blossom set spray contains cytokinin which is used to help set fruit in many plants including tomatoes, pepper, melons, and berries. It is also used in cotton production and is said to increase yields substantially. I will be doing some further research. I will let you know if I find anything more helpful.