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Enhancing Return Bloom of Apple

Apple flower buds are formed in June and July for most varieties. Roughly 25-30 days after full bloom is the rule of thumb for the end of the thinning window, and the beginning of the flower bud development stage. Though this is a rough guideline, actual physiological responses are a result of degree day accumulations.

W. Cowgill & W. Autio
Last Updated: 
September 2012