![]() Store at 60° (16☌), in a dark, humid place and avoid unnecessary handling. STORAGE: Brush soil from roots and cure in a warm 85☏ (29☌), dark, humid (85% RH) and well-ventilated place for 4-7 days to toughen skin. If plants get frosted, harvest as soon as possible - frost damage will travel from the plants down into the roots, and affect storage quality. HARVEST: Dig roots in fall before hard frost and before soil temps. INSECT PESTS: Sweet potatoes are usually free from major insect infestations, but problems may arise from flea beetles, Japanese beetles, wireworms, and sweet potato weevils (in Southern U.S.). DISEASES: Avoid diseases such as scurf with crop rotation and by removing all plant debris after harvest. Keep well-irrigated until plants are established. Plant slips 3-4" deep in raised beds 10-18" apart in rows 36-60" apart. ![]() In cold regions, black plastic mulch may help to warm the soil and is recommended. Murasaki Sweet Potatoes at Trader Joe’s These Trader Joe’s Japanese sweet potatoes come out great when you toss them in some olive oil and sea salt and bake them at a fairly high temperature in the oven. Plant out as soon as danger of frost has passed, and soil temp. Place upright and keep at room temp., out of direct sunlight and wind. If planting must be delayed, wrap the root end of the slips in moist paper towels, keeping the leaves and stems dry. A lack of visible roots does not negatively impact viability or yield. The slips may be dry, wilted, pale or brown in color when they arrive - this is normal. SCIENTIFIC NAME: Ipomoea batatas CULTURE: Sweet potatoes grow best in well-drained, sandy loam soil with a pH of about 6.5.
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