I've been grown an orange tree Now since 2007. the temperatures during the winter time inside my apartment are kept between 65 F to 67 F. I have a 12 hour cycle of compact fluorescent lights CFL 27 Kelvin to 65 Kelvin Per day. my question is as far a supplements and fertilizers. what is appropriate and what ratio and how many times per month In the winter and summer? Fertilizers that I Have at the moment By the company called son leaves OMRI Mexican bat guano Organic fertilizer 10-2-1 plus some other supplements such as by a company called advanced nutrients F-1 Grandma ENGGY`s Golden Honey. Are these ok?
An NPK ratio of 5-1-3 is reported to be ideal for containerized citrus. Micronutrients should be included in the mix. I'm not familiar with the two fertilizers that you have. As for rate of application I would generally follow that recommended on the label. Having said that I personally fertilize at half-strength during the winter months when there is relatively less activity in the trees. However your case may be different as you have supplemental lighting.
