small (4 - 8mm) 4 litre bag of Orchid Bark for Plants, Organic Pine Bark for Proper Root Development for Phalaenopsis, Cattleyas, Dendrobiums, Oncidiums, Paphiopedilums and More other sizes available include medium (12 - 18mm), and large (18 - 35mm) sizes Mulch acts as an insulating shade layer for potting soil, keeping plant roots from overheating in the summer and also helps insulate roots during winter months 【Promotes Root Health】These barks helps with proper aeration and root growth and lasts a long time without breaking. Good moisture retention can help plants live in a suitable environment
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