I once read the best time to prune is about 6 months previous to bloom time. If ya hurry you can get er done now and be close enough. Your county representative may be of assistance on timing also.
https://extension2.missouri.edu/fin...lth-and-production/horticulture-and-gardening
https://extension2.missouri.edu/fin...lth-and-production/horticulture-and-gardening