Because ebi-imo is likely to be damaged by fertilizer, the decision of when to plant should be taken with consideration of the water in the soil, and it is better to do the planting just after a rain when the soil is wet enough.
海老芋は肥料障害を受けやすいため、植え付け時の決定は土壌の水分状態を見て行い、植え付けは雨降直後土が充分湿気を保っている時が良い。