The present disclosure relates to systems and methods for drying materials using hydrogen combustion exhaust. The system generally includes a hydrogen generator, a burner, and a drying chamber. The method generally includes burning hydrogen and directing the combustion exhaust to a drying chamber, wherein the heat from the combustion exhaust dries the material.

A drying rack having a stainless steel rectangular tubed frame with two vertical frame members and at least three horizontal frame members. The horizontal frame members have a plurality of rails extending from the horizontal members. The each rail of the plurality of rails is each equally spaced and extends from opposites sides of each horizontal member. The rails are configured to hold cannabis plant matter after harvest. The rails may be angled slightly for helping to retain the cannabis plant matter on the rails during use. The drying rack is on casters for mobility and rotation.

Systems and methods for freeze drying botanical or herb items or products using a modular vacuum chamber configuration are provided. Such configurations can reduce or prevent the evaporative loss of volatile compounds while reducing the temperature and removing air to prevent oxidation of the product. The freeze drying systems and methods of the present invention can improve organoleptic characteristics, shelf life, and extractions.