Soft, springy, and full of water-holding magic, vermiculite is a natural mineral that's been heat-expanded to help plants thrive. It excels in retaining moisture and nutrients, making it great for seed starting, propagation, or boosting water retention in drier mixes. Unlike perlite, it doesn’t increase drainage - it’s all about gentle, steady hydration. Ideal for baby plants and moisture-loving varieties that appreciate a little extra TLC.