Fruit-stage management methods for potted kumquat and conditions for extending the flowering period
Potted kumquats often drop flowers and fruit. For example, rainy weather during the flowering period, excessive water control, or an inadequate supply of fertilizer and water when new shoots sprout, as well as high temperatures, can all easily cause flower and fruit drop. For this reason, fruit-stage management and control work should be done well.
Before and after flowering, in addition to proper fertilizer and water management, water should also be sprayed on the leaves in the morning and toward evening to lower the temperature. If new shoots are found sprouting, they should be removed promptly. During flowering, flowers should be thinned appropriately to save nutrients.

After the flowers fade, 0.3%-0.4% urea or 0.3% compound fertilizer can be sprayed, with 15 ppm of 2,4-D added. This has a notable effect on fruit retention in potted kumquats.
After young fruit has set, when the young fruit grows to 1 cm in size, fruit thinning should also be carried out. Generally, it is advisable to leave 2-3 fruits per branch. Within the same leaf axil, sometimes 2-3 young fruits are borne, and only one can be selected and kept, while the fruits on the whole plant should be distributed evenly.
Afterward, the autumn shoots should be cut off promptly so as not to allow a second fruiting, thereby favoring good fruit development -- uniform fruit shape, size, and maturity, and a higher ornamental value.
Under normal conditions, the fruit gradually turns yellow after the Beginning of Winter. To coordinate with viewing during the Spring Festival, if the fruit ripens too early, measures such as shading and applying more nitrogen fertilizer (0.4% urea) can be used to delay the ripening period.
If the fruit ripens too late and has not turned yellow in time for the Spring Festival, 25 days before the intended ripening period, 1500 ppm ethephon can be applied to the fruit, or 20-50 ppm gibberellin can be sprayed. Both have notable effects.