Keep potatoes watered, especially during the flowering stage as this is when the plant is creating new tubers. An uneven water supply can cause misshapen tubers or growth cracks.

Potatoes can benefit from some fertilizer or compost matter in the soil. Choose a balanced fertilizer such as 5-10-10 or 10-10-10. Excessive nitrogen can cause plants to produce too much foliage and delay tuber growth.