The common grass fern and Formosan sugar palm are both light and easy to transport, and are also extremely resistant to moisture. Set in the earth, they can last as long as 40 years without rotting, so they are ideal for Ilan's damp climate.
筆筒樹和山棕一方面材輕易搬運，另一方面又十分耐潮，埋入土中當柱子，至少四十年不壞，最適合宜蘭這多雨潮濕的環境。