Double sided material imported via .dae from Blender

Hello Guys,
I would like to import my leave/plant models from Blender but I only see a top texture of leaves, bottom side is still gray. Can somebody help me how to correct export from blender to Sketchup?
I woul like to use image.png texure with transparent background like leaves. For now only way is to use “CUBE” instead plane and create specific shape of leave.
Thank you for any help