|When and how do you start yams in a coldframe?|
|Yams are tropical plants that require a great deal of heat and humidity, both day and night, throughout a long growing season, in order to produce tubers. Unless you plan to grow them in a greenhouse, they won't have the right growing conditions in your area. But - don't let that stop you from trying! Purchase yams from your local grocery store and cut off the ends. Place the ends in a tray of water until both roots and vines sprout. Then transplant into soil-filled pots and place them in your coldframe. When the weather and soil warms in the spring, transplant them into the sunniest area of your garden. Cross your fingers and wait. When the vines die back in the fall, dig the plants to see if they produced any tubers.