CLIMBING PLANTS ON WALLS AND FENCES LEADS TO VOMITING AND NAUSEA

住宅圍牆不可滋生纏藤，陰氣太重，易招陰，宅內的人， 腸胃不好，胃酸多，(木剋土)。

Fences and walls of the house should not be covered by climbing plants. Due to yin qi being too heavy, wood invades earth, increasing stomach acids leading to vomiting and nausea.

Source: http://fengshuijinyan.com/C05_FS_Tips/C05_FS_Tips_001.htm