3,545. When the Previous Halacha Applies

Hilchos Maaser Sheini and Neta Revai 7:7

The aforementioned prohibition against using second tithe money to buy a beverage of water and grapes applies when mixing three parts water with the grape dregs yields less than four parts total (based on the volume of juice extracted from the dregs); if three parts water yields four parts, then the mixture is considered diluted wine and one may buy it using second tithe money.

Hilchos Maaser Sheini and Neta Revai 7:8

The buds of branches and carob may not be purchased with second tithe money before they sweeten; after they sweeten, they may. Arum, mustard, vicia and other plants that are pickled may be bought with second tithe money regardless of whether or not they have sweetened. Date tips may be purchased using second tithe money.