This project evaluates a novel approach to managing pre-harvest fruit drop (PFD) and enhancing red coloration in ‘Honeycrisp’ apples by combining two plant growth regulators: aminoethoxyvinylglycine (AVG, marketed as ReTain) and 1-aminocyclopropane-1-carboxylic acid (ACC, marketed as Accede). Conducted over two seasons (2023–2024) in Virginia, the study compared six treatments—including ReTain, Accede, Motivate (ethephon), and their combinations—applied to mature ‘Honeycrisp’ trees. While ReTain effectively reduced fruit drop, it also suppressed color development. Conversely, Accede enhanced coloration but led to higher fruit drop. The combination of ReTain and Accede proved to balance these trade-offs, significantly reducing fruit drop while improving red color and maintaining desirable fruit quality traits. The findings offer a practical strategy to maximize both yield and marketability in ‘Honeycrisp’ apple production.

This publication summarizes a three-year field study investigating the effects of ten commercial rootstocks on flower bud mortality in ‘Gala’ and ‘Fuji’ apples during natural spring frost events in Virginia. Results highlight significant rootstock-specific differences in bud survival, with B.9 consistently showing the lowest mortality. The findings offer practical recommendations to help growers select cold-hardy rootstocks that reduce frost-related losses and improve crop reliability in the face of shifting climate patterns.