Here we have a small tree holder with a telescopic extensionable arm and a fixing screw with metric M6 x1 printed thread. It is wallmounted with doublesided adhesive tape and can be adjusted in distances between 15cm and 30cm.
The diameter of the tree can be up to 25mm.
It all can be printed PRINT IN PLACE with that "ALL print in place" .stl file, for Example with layer height 0.16 at a printing time of 2h 30 min. with Creality K1 MAX generig PETG or all separately.
The shells should be glued in the hole for perfect stability in the wind.