Sweet Potato

Water

Rain is enough, even in a dry year.

Needs about 410 mm of water here in its growing months. Rain gives about 970 mm it can use in a normal year, and 690 mm in a dry year.

Temperature

Grows best at 18–28 °C on average, and survives 10–38 °C.

Here, in its growing months (day / night):

• Jul 31 °C / 26 °C (outside its best range)
• Aug 32 °C / 26 °C (outside its best range)
• Sep 32 °C / 26 °C (outside its best range)
• Oct 31 °C / 23 °C
• Nov 29 °C / 18 °C

Months in orange are outside its best range.

Soil

Soil for Sweet Potato: 8 out of 10 (good).

• The pH here suits it.
• Many fields here are short of potassium, which it needs a lot.
• Most fields here are short of organic carbon.
• Most fields here are short of boron.

Likes pH 5.0–7.0.

Money

Yield: about 20 quintals an acre here (district figures).

Mandi price at last season's harvest (December 2025): about ₹2,300 a quintal across India's mandis.

This week: about ₹3,200 a quintal, the middle of 73 mandis across India (latest 13 Nov). At that price an acre would leave about ₹10,000 a season after typical costs.

Prices are usually best in September.

Typical costs are about ₹55,000 an acre: about half of what a usual harvest earns (2023–2025), as in farm cost surveys. They are spent whatever the harvest.