How often should i fertilize my bonsai? This topic has 1 reply, 2 voices, and was last updated 7 years, 1 month ago by jbbonsai. Log In Register Lost Password Viewing 2 posts - 1 through 2 (of 2 total) Author Posts September 21, 2017 at 2:57 pm #1974 OELbonsaiParticipant would like some help with fertilizing my bonsai, as i am new to the hobby September 29, 2017 at 9:19 am #2063 jbbonsaiKeymaster We recommend fertilizing every month. However, we scale back during winter and increase during the spring. You don’t need to use too much. Just follow the directions on the packaging. Over fertilizing will lead to leggier growth. Author Posts Log In Register Lost Password Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In