How can Brassinolide be combined with other plant growth regulators?
1. Forchlorfenuron + Brassinolide
Forchlorfenuron is highly effective at promoting fruit enlargement. When combined with Brassinolide, it not only promotes fruit expansion and overall plant growth but also helps retain flowers and fruit, preventing fruit drop. It stimulates both lateral and longitudinal organ growth, thereby effectively enlarging the fruit and improving fruit quality. Trials have shown that application on wheat and rice increases the thousand-grain weight, resulting in higher yields.
2. Foliar Fertilizer + Gibberellic Acid + Brassinolide
This combination promotes seedling growth, fruit expansion, fruit set, and yield increases, as well as the sprouting of dormant buds and the development of robust seedlings. A typical formulation involves mixing 60 ml of Brassinolide with 60 kg of water, adding 1.5 g of 90% Gibberellic Acid crystals (GA3 should be diluted twice to ensure even dissolution) and 180 g of potassium dihydrogen phosphate. Fruit-retention sprays are generally applied once about 15 days before the second wave of physiological fruit drop, followed by applications at approximately 15-day intervals, totaling 2–3 sprays.
3. Brassinolide & DA-6
Formulated as aqueous solutions, Brassinolide and DA-6 are plant growth regulators that have gained popularity over the past two years. They are distinguished by their excellent rapid-acting and long-lasting effects, as well as their safety profile, making them the hottest-selling new plant growth regulators in recent years.
4. Brassinolide + Ethephon
Ethephon can reduce corn plant height, promote root development, and enhance lodging resistance, though it also significantly inhibits ear development. Treating corn with a combination of Brassinolide and Ethephon—compared to using either alone—significantly boosts root vitality, delays late-stage leaf senescence, promotes ear development, and results in shorter, thicker stalks with higher cellulose content and greater toughness. This combination drastically reduces lodging rates during high winds compared to controls and increases yield by 52.4%.

5. Brassinolide + DA-6 + Ethephon
This combination of plant growth regulators for controlling excessive vegetative growth in corn has gained popularity in recent years and is currently considered the best option for managing corn plant height. It overcomes the side effects associated with using growth inhibitors alone—such as smaller ears, thinner stalks, and reduced yields—by effectively redirecting nutrients toward reproductive growth. The resulting plants are shorter and greener, with large, uniform ears and well-developed root systems, offering strong resistance to lodging.
6. Brassinolide + Paclobutrazol
Formulated as a soluble powder, this combination is primarily used to control shoot growth and promote fruit enlargement in fruit trees. It has become a popular specialized plant growth regulator for fruit trees in recent years, with its application rapidly expanding.
7. Brassinolide + Mepiquat Chloride
Brassinolide enhances photosynthesis and promotes root development, while Mepiquat chloride balances the growth and development of cotton plants, controlling excessive vegetative growth, delaying leaf senescence, and boosting root vitality. Research indicates that applying a combination of Brassinolide and Mepiquat chloride during the budding, early flowering, and peak flowering stages yields better results than using either substance alone. This synergistic effect manifests as increased chlorophyll content and photosynthetic rates, enhanced root vitality, and effective control of excessive vegetative growth.
8. Brassinolide + Mepiquat Chloride + Paclobutrazol
Mepiquat chloride acts quickly to control excessive growth but has a short duration of effect, whereas Paclobutrazol is characterized by its ability to inhibit vegetative growth, shorten internodes, and promote reproductive growth over a prolonged period. Combining these substances ensures a long-lasting effect, effectively controlling excessive growth while simultaneously increasing yield and improving lodging resistance.
Forchlorfenuron is highly effective at promoting fruit enlargement. When combined with Brassinolide, it not only promotes fruit expansion and overall plant growth but also helps retain flowers and fruit, preventing fruit drop. It stimulates both lateral and longitudinal organ growth, thereby effectively enlarging the fruit and improving fruit quality. Trials have shown that application on wheat and rice increases the thousand-grain weight, resulting in higher yields.
2. Foliar Fertilizer + Gibberellic Acid + Brassinolide
This combination promotes seedling growth, fruit expansion, fruit set, and yield increases, as well as the sprouting of dormant buds and the development of robust seedlings. A typical formulation involves mixing 60 ml of Brassinolide with 60 kg of water, adding 1.5 g of 90% Gibberellic Acid crystals (GA3 should be diluted twice to ensure even dissolution) and 180 g of potassium dihydrogen phosphate. Fruit-retention sprays are generally applied once about 15 days before the second wave of physiological fruit drop, followed by applications at approximately 15-day intervals, totaling 2–3 sprays.
3. Brassinolide & DA-6
Formulated as aqueous solutions, Brassinolide and DA-6 are plant growth regulators that have gained popularity over the past two years. They are distinguished by their excellent rapid-acting and long-lasting effects, as well as their safety profile, making them the hottest-selling new plant growth regulators in recent years.
4. Brassinolide + Ethephon
Ethephon can reduce corn plant height, promote root development, and enhance lodging resistance, though it also significantly inhibits ear development. Treating corn with a combination of Brassinolide and Ethephon—compared to using either alone—significantly boosts root vitality, delays late-stage leaf senescence, promotes ear development, and results in shorter, thicker stalks with higher cellulose content and greater toughness. This combination drastically reduces lodging rates during high winds compared to controls and increases yield by 52.4%.

5. Brassinolide + DA-6 + Ethephon
This combination of plant growth regulators for controlling excessive vegetative growth in corn has gained popularity in recent years and is currently considered the best option for managing corn plant height. It overcomes the side effects associated with using growth inhibitors alone—such as smaller ears, thinner stalks, and reduced yields—by effectively redirecting nutrients toward reproductive growth. The resulting plants are shorter and greener, with large, uniform ears and well-developed root systems, offering strong resistance to lodging.
6. Brassinolide + Paclobutrazol
Formulated as a soluble powder, this combination is primarily used to control shoot growth and promote fruit enlargement in fruit trees. It has become a popular specialized plant growth regulator for fruit trees in recent years, with its application rapidly expanding.
7. Brassinolide + Mepiquat Chloride
Brassinolide enhances photosynthesis and promotes root development, while Mepiquat chloride balances the growth and development of cotton plants, controlling excessive vegetative growth, delaying leaf senescence, and boosting root vitality. Research indicates that applying a combination of Brassinolide and Mepiquat chloride during the budding, early flowering, and peak flowering stages yields better results than using either substance alone. This synergistic effect manifests as increased chlorophyll content and photosynthetic rates, enhanced root vitality, and effective control of excessive vegetative growth.
8. Brassinolide + Mepiquat Chloride + Paclobutrazol
Mepiquat chloride acts quickly to control excessive growth but has a short duration of effect, whereas Paclobutrazol is characterized by its ability to inhibit vegetative growth, shorten internodes, and promote reproductive growth over a prolonged period. Combining these substances ensures a long-lasting effect, effectively controlling excessive growth while simultaneously increasing yield and improving lodging resistance.