Though not especially potent, popular, or versatile, Purple Frost can be an effective medical treatment for insomnia as well as anxiety and depression.
It's a sativa-indica hybrid, but the exact balance of sativa to indica is a mystery; it's not even clear which type of genes is dominant. The limited high suggests it could be the indica, since the effects are sleepy and mostly physical, but there isn't enough information to say for sure.
There are few if any public reports on THC levels in this strain, but they don't appear to be terribly high; though covered in trichomes, Purple Frost is reported to have below average potency. CBD quantities aren't widely available, but that alone means this strain isn't a good choice for medicating seizures or other conditions that require that cannabinoid.
The flavor and smell are fruity and spicy, while the nugs are small with leaves of dark green and purple, brown hairs, and a layer of crystals that looks like granulated sugar.
Though sold in select medical marijuana dispensaries on the West Coast, Purple Frost isn't widely available.