Research on the effects of planting season, density and spacing on the growth, development and yield components of honeysuckle (Lonicera japonica Thunb.)

Honeysuckle (Lonicera japonica Thunb.) has traditionally been used in medicine to treat mastitis, boils, itching, and allergic conditions. This study was conducted in Gia Lai to determine the appropriate planting season, density, and spacing to optimize the growth, development, yield, and quality of honeysuckle. May was identified as the optimal planting season, suitable for achieving high yield, vigorous growth, and good medicinal quality. The most suitable planting spacing for honeysuckle is 0.8 m × 0.8 m, corresponding to a density of 15,600 plants per hectare. The average yield of dried honeysuckle flowers ranges from 0.7 to 0.8 tons per hectare, while the yield of honeysuckle stems reaches 7.5 tons or more. The active compound content meets the standards specified in the Vietnamese Pharmacopoeia V (2017).