Hello!
The strings are in place, very lightly, to help the relax the lower two branches down a bit and keep the main trunk as vertically upright as possible.
When you state that fertilizing every two weeks is plenty, would that mean one complete saturation with the fertilizer-water solution? I have been basically misting the topsoil to saturation with the water-fertilizer mix but not a full watering with it.
Thank you!