Rice hulls that have been partially boiled before drying, a process that neutralizes organic compounds and prevents them from decomposing and altering substrate pH when used as a growing medium amendment.
Dakota states they will source parboiled rice hulls for a future side-by-side test against perlite in the Autopot system. Parboiled hulls are the recommended alternative to raw hulls for hydroponic and coco-based growing.
Discussed in: Ep 005