Trenches that are 7 to 8 inches deep should require less hilling. A relatively shallow trench of about 4 inches would need 6 to 8 inches of hilling. How deep was your trench? Also remember that part of the reason you hill is to keep keep the spuds moist; the soil helps with that. When you reach the desirable height, consider mulching. Potatoes need at least 1 inch of water per week. We hope this helps and that you have a hefty harvest!
Trenches that are 7 to 8 inches deep should require less hilling. A relatively shallow trench of about 4 inches would need 6 to 8 inches of hilling. How deep was your trench? Also remember that part of the reason you hill is to keep keep the spuds moist; the soil helps with that. When you reach the desirable height, consider mulching. Potatoes need at least 1 inch of water per week. We hope this helps and that you have a hefty harvest!