Dear Sir/Madam I will be so happy if you answer my question. I am wondering if I can grow the Sarcococca plant indoors on my north-facing window balcony. My balcony is semi-shaded and semi-airy and one window is open in summer times. The Hardiness zone is 7b. Regards.
Since this will be indoors, your hardiness zone won't have too much to do with this. With this being said- These small shrubs will make an excellent indoor specimen with little care. If a north-facing window seems to produce slow growth then a west or east location may be better. This will be trial and error.
This article will help: https://www.gardeningknowhow.com/ornamental/shrubs/sweetbox/growing-sweetbox-shrubs.htm