In 2022, campaign group Fashion Revolution chose a dye garden for its Chelsea Flower Show presentation. Meanwhile, influencers on TikTok have given #plantdyeing the rubber stamp of a new generation.

The process of at-home tie-dyeing is far from new. In fact, we’ve been doing it since we were kids — at sleepovers, summer camps, and oh-so-many birthday parties. But as adults, upon feeling ...