Indoor Gardening and Houseplants: A Discussion about Houseplant Soils (long post), 1 by tapla
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In reply to: A Discussion about Houseplant Soils (long post)
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Size is important - see the first two pictures in this thread for appropriate sized bark. If you can't find what you see in the pictures, or partially composted bark, which will be smaller still and slightly decomposed - wait until you can find something appropriate and keep looking. You guys need to be patient and adopt the idea that you want to understand why these materials work so well together & then commit to the effort it takes to find them or a very close alternative. I promise that once you settle on a free-draining and durable soil you can duplicate over and over, it will pay big dividends in your abilities to keep plants happy.
See partially composted bark at the top of the picture. It's also ideal. The pine bark at the left is too large & the fir bark at the right is borderline too large.