Your yams will be ready to harvest after the first frost blackens and kills their leaves. Use a shovel to bring in your potato crop, and remember that these roots extend straight down from the plant's crown.
Homegrown yams are sweeter and more colorful than the store-bought kind.
The bush sweet potato produces luxuriant growth which won't overrun every other crop in your garden. The "bush" breeds (the most common is called "Porto Rico") are available through most seed outlets.
PHOTO: GORDON SOLBERG