As most people have come to know that adding both Coffee and tea to your compost puts nutrients back into the soil when your compost bin has complete it’s cycle, which is usually 1 to 2 years.
In this book one of the uses explained to use the used tea leaves directly to the roots of the plant. So therefore placing the tea leaves to the trunk base of shrubs and plants, also mentions that the same info can be used with your household plants.
Best to let the tea leaves dry and then apply.
Reference: New Tastes in Green Tea — by Mutsuko Tokunaga
“Chabashira ga tatsu to engi ga yoi” (It’s a good sign if a tea stem floats upright in your cup).