Availalble for purchase by the pound. By far, the most affordable and efficient way to prepare your soil for blueberries. A little bit can go a long way. In some cases, we're talking in the tenths of pounds range per application to a roughly 10 square foot area. This would be the area needs for a couple blueberry plants. It is recommended to divide the total desired amount of sulfur needed for attaining your target soil pH and apply throughout the season, in order to avoid damaging other soil qualities. Here is a link to an excellent free web-based tool offered through Clemson University for calculating your recommended sulfur application rates, based on your soil type, starting pH, and target pH: https://precisionag.sites.clemson.edu/Calculators/Fertility/SoilAcidification/