Don't fertilize your sweet potatoes at planting time — they don't require much in the way of nutrients. An excess of nitrogen will encourage leafy growth rather than big tubers. The best soil for sweet potatoes is loose and rich in organic matter. 29 янв. 2021 г.
What's the best fertilizer for sweet potatoes?
A crop of sweet potatoes utilizes about 110 pounds of nitrogen, 15 pounds of phosphorus, and 150 pounds of potassium per acre from the soil. Based on OSU soil test results, the following amounts of P2O5 (phosphorus) and K2O (potassium) are recommended (Table 2).
What nutrients do sweet potato plants need?
Of the “big three” nutrients, nitrogen (N), phosphorous (P) and potassium (K), potassium plays the largest role in a full and healthy crop. Sweet potatoes need plenty of K, (~150-200 pounds per acre, as opposed to ~60 pounds of both nitrogen and phosphorus per acre)1.
When should I fertilize my yams?
Best yields are obtained when weeding is done as frequently as they grow up in the yam plot. Fertilization is best done at 8- 10 weeks after planting.
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