PH
Stream Disas in the wild are found near water that is extremely acidic. When I checked the pH of some of the streams by which they grew, I was very surprised to find that the pH of the water was always between 4.1 and 4.7 where we found tripetaloides, aurata, and uniflora. Even the habitat for racemosa was only slightly higher at 5.2. This means that you need to provide a growing environment that is definitely acidic. Don't try to do this by adjusting the water however, as the streams in South Africa have an organic acid complex which lowers the pH. If you add water that has been lowered to a pH of 4.5 with Phosphoric Acid, you will quickly produce unhealthy plants. The main point is that you should be aware of the pH of the water with which you are watering. In most cases, the choice of an acid potting medium containing peat moss or sphagnum moss will be able to compensate for water having a pH higher than optimal.
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