Now lets discover more about why your houseplants prefer a solo existence or if there are rare occasions when grouping them together is better for their well-being. · generally, houseplants should not touch each other. Proximity may increase vulnerability to pest infestations. So the short answer is no , houseplants should not touch each other. While grouping plants together can help ensure they all receive equal light, it is generally advised that they should not touch. · learn whether its a good or bad idea for houseplant leaves to touch one another, plus tips for arranging plants in your home so they grow healthy and thrive. Science has discovered they can feel touch, so if touched by another plant it can cause a genetic defense response that reduces growth. But, i dont like others to touch my plants unless i know that they also have plants and are going to be gentle with them. There are some plants like succulents that have a protective layer on them and touching that can damage that layer. · a new study has found that most plants are extremely sensitive to touch , and even a light touch can significantly stunt their growth. · heres the whole lot you want to find out about whether or not houseplants touching is a good suggestion or one thing to keep away from.