This blend uses a mixture of: Coco Coir, Worm Castings, Horticultural Sand, Zeolite, Activated Charcoal. This is a highly nutritious and well-draining mixture. Given that Fern have very primitive, hair-thin roots, sand is a very important component in creating micro-passages for the roots to crawl through. Alongside this, the doubled amount of worm castings with a high Coco coir portion means this mix is fertile and moisture retentive. The sand creates tiny pockets of air for the roots as well as superior drainage, while the Perlite scatters larger air chambers throughout the pot. The Zeolite present in the mix will also hold a lot of the nutrients when watering, allowing the roots to feed for longer. Although there are a variety of Ferns found in the household this mix suits the majority of them nicely. What ferns ultimately want is moisture and fertility. However it is also important to remember the fine structure of ferns roots. It’s important that the soil is as loose as possible (which is why we add sand) as it allows these tiny roots to easily crawl through the pot, rather than work through dense, muddy substrate. Ferns benefit a lot from organic matter in soil, another benefit to the extra portion of worm castings. As with all of Soil Ninjas premium mixes a population of positive bacteria, mycelium and microfauna is present in the substrate to create the potted ecosystem which keeps your plant healthy! Enough nutrients for the first 2 months of growth is also in every bag along with their specialist nutrient storage component, Zeolite. Some of the other plants this soil blend is ideal for are: Escargot Begonia, Iron Cross Begonia, Painted Leaf Begonia, Strawberry Begonia, Bloodleaf, Cranesbills, Hibiscus, Ivy, Jasmine, Purple Passion, Rex Begonia Vine, Seedlings, Tender Herbs. Material: Soil Blend and 100% recyclable Polyethylene plastic bag.