Buying a plant just feels like an inherently eco-friendly act. In a rush of horticultural enthusiasm, it’s easy to forget that, like the fashion industry, the wide world of houseplants offers a full spectrum of quality: everything from fast and cheap mass retailers to the more expensive, bespoke, and sustainable brands are a few clicks away. But what sets the small, independent brands apart from the mass market retailers? And what are the best brands to buy from?