External color is a crucial indicator of fruit quality and a primary selling point for commercial fruit; consequently, it is highly valued by growers, traders, and consumers alike.
The type, content, and distribution of anthocyanins determine fruit color. Anthocyanin synthesis in the fruit skin increases as chlorophyll degrades, and varieties with deeper red coloration typically possess higher anthocyanin levels.

Treating kiwifruit cuttings with IBA-K yields superior rooting results. Trials using a rapid dip method—immersing *Actinidia chinensis* hardwood cuttings in a 5,000 mg/L IBA-K solution for 3 seconds—achieved survival rates of 81.9%–91.9%, with an average of more than 10 roots per cutting. For softwood cuttings, a rapid dip in 500–1,000 mg/L IBA-K resulted in rooting rates of 95%–100%.

Brassinolide has been in use for a long time, available in a wide range of types, grades, and price points. However, some users wonder why the results aren't as miraculous as rumored. Did they buy a counterfeit product, or are they using it incorrectly?

Flower and fruit thinning agents are plant growth regulators that induce the abscission of a portion of flower buds or young fruit. Commonly used agents include dinitro-o-cresol (DNOC), 1-Naphthylacetic acid (NAA), phenylacetamide, and ethephon.

Brassinosteroids respond to high-temperature stress by activating protective enzyme systems to maintain cell membrane stability, regulating stomatal opening and closing to reduce water loss, and promoting cell division to accelerate the repair of damaged tissues.

For summer crop drought resistance, the preferred choices are Brassinolide, DA-6, Sodium Nitrophenolates (Atonik), and Fulvic Acid-based regulators; combining these with foliar sprays of potassium dihydrogen phosphate yields the best results.

Gibberellic Acid (GA3) is a plant hormone that promotes stem and leaf growth, reduces the shedding of cotton buds and bolls, increases barley yields, and improves fruit set rates for crops such as grapes, citrus, and pears.

To improve fruit set in sweet cherries, a Gibberellic Acid (GA3) solution at a concentration of 20–40 mg/kg can be sprayed during full bloom, or a 10 mg/kg solution can be applied 10 days after flowering. Methods to promote cherry fruit growth include:

The scientific application of plant growth regulators to manage the growth and development of fruit trees represents a new approach to producing high-value fruit. These regulators are versatile: they can either promote seed germination or prolong dormancy; stimulate shoot elongation or inhibit/delay shoot growth;