For curing Sweet Potatoes, remember that 80 degrees with high humidity is the ideal, but not a exact requirement. In order to store them in the cool you need to time your harvest to that time of the year that is cooling off in your region. Otherwise your are trying to cure them in 90-100 degree weather or if too late in the year, 30-50 degree weather. I harvest mine when the weather is starting to change in October (NE Louisiana), when some days are in the low to mid 80s. After you have dug them up, DO NOT wash them. This removes healthy bacteria and opens them up to fungus decay. Let them dry outside under a shed (out of the sun and rain) for several days. This helps get them dry. Then transfer them to a storage room or a room in your house that stays around 80 degrees or fluctuates in the 60-90 degree range (I keep mine in an outside storage room spread out on racks or on the floor). If you mist stack them, try not to stack them more than two deep, as their skin contact slows the drying process and promotes fungus growth. For humidity I keep a couple of five gallon buckets of water with wet towels around the edge of them or hung up above them. Saturate the towels every day. The evaporation will add humidity to the room. The curing process may take ten days or it may take 30 depending on your situation. When the skins are no longer easily scraped off, they are cured. By then the weather will be cooler and I keep them in the same storage room (with NO water or wet towels). My winters here are mild, but the temperature in my storage room varies from 75-30 degrees throughout the winter, and mine store fine for 6-8 months. I have repeated this process for many years. Remember, our ancestors grew and stored these potatoes with very little temperature and humidity control, and they did fine. Regarding the question of having great looking vines but few potatoes, first I would get a good soil test done, but as they were grown in a raised bed, too much Nitrogen may be the problem, as excess N will tend to put more growth into the vines than the roots. Same thing goes for peas. I hope this helps. Happy gardening.
For curing Sweet Potatoes, remember that 80 degrees with high humidity is the ideal, but not a exact requirement. In order to store them in the cool you need to time your harvest to that time of the year that is cooling off in your region. Otherwise your are trying to cure them in 90-100 degree weather or if too late in the year, 30-50 degree weather. I harvest mine when the weather is starting to change in October (NE Louisiana), when some days are in the low to mid 80s. After you have dug them up, DO NOT wash them. This removes healthy bacteria and opens them up to fungus decay. Let them dry outside under a shed (out of the sun and rain) for several days. This helps get them dry. Then transfer them to a storage room or a room in your house that stays around 80 degrees or fluctuates in the 60-90 degree range (I keep mine in an outside storage room spread out on racks or on the floor). If you mist stack them, try not to stack them more than two deep, as their skin contact slows the drying process and promotes fungus growth. For humidity I keep a couple of five gallon buckets of water with wet towels around the edge of them or hung up above them. Saturate the towels every day. The evaporation will add humidity to the room. The curing process may take ten days or it may take 30 depending on your situation. When the skins are no longer easily scraped off, they are cured. By then the weather will be cooler and I keep them in the same storage room (with NO water or wet towels). My winters here are mild, but the temperature in my storage room varies from 75-30 degrees throughout the winter, and mine store fine for 6-8 months. I have repeated this process for many years. Remember, our ancestors grew and stored these potatoes with very little temperature and humidity control, and they did fine. Regarding the question of having great looking vines but few potatoes, first I would get a good soil test done, but as they were grown in a raised bed, too much Nitrogen may be the problem, as excess N will tend to put more growth into the vines than the roots. Same thing goes for peas. I hope this helps. Happy gardening.