2. Get cool potato seeds. Unless you already have seeds, you will need to purchase them. Cool potato seeds can be bought at nurseries or seed stores, or even online. Check the package before planting to make sure you have the proper seeds.
3. Soak the cool potato seeds before planting. Putting cool potato seeds in warm water can speed up germination. Place the seeds in a pan filled with warm water and let them soak for 24 hours, then, remove the seeds from the water.
4. Cool Potato Planting Site Selection. Find a spot in your garden that can receive 6 to 8 hours of sunlight per day, the location you choose to plant will affect the final harvest results, so the location you choose should have in 6 to 8 hours exposure to full sunlight. Ensure that the location where you plant your cool potatoes has fertile soil, choose a location that is moist but has well-drained soil, and make sure that the soil is alkaline with a pH of 7 or higher, you can test the pH of the soil with a test strip.
5. If you want to plant the seeds before the last frost, then you can plant them in pots indoors. Use perlite or vermiculite, mixed with some peat moss as the cultivation soil, and raise the seedlings in a medium-sized pot, which should be placed in a warm place, such as a windowsill where the sun can reach them. If you start off with seedlings in pots, then just transplant them to the vegetable garden when they reach 7.6 cm in height.
6. Water the cool potato seeds, which you will need to look after if you decide to plant them in pots before the frost is over. Once you have planted your sweet potato seeds in a pot until the end of the last frost before transplanting them to your vegetable garden, make sure to give it regular watering, or water when you feel the soil is dry, until it is moist.
7. Dig small holes in the ground where the cool potatoes will be planted. The depth of the holes should be about 0.6 cm, the number of holes to be dug depends on the number of seeds you want to sow, the holes should be about 30 centimeters apart from each other, and there should be a distance of 0.61 to 0.91 meters between the rows if you are planting more than one row.
8. Put the cool potato seeds in the soil. You can either dig the holes first, or you can plant the seeds while digging the holes and then cover the seeds lightly with soil. No need to water before planting, the soil will be moist and warm.
9, lightly sprinkle water to water the planted cool potato seeds. Water the seeds after planting and also when the soil becomes dry, only when you sprinkle water, the soil will be moist. Even if the soil is dry, don't overwater to the point of soaking the seeds with water; using a sprinkler to sprinkle will help you control the amount of water you water. Fertilize your cool potatoes once a month. You can use a multi-purpose fertilizer and just follow the directions on the fertilizer package; usually, you only need to fertilize around the roots of the plant. You can buy fertilizer at a nursery or garden store, and if you're not sure which brand to buy, ask the clerk for fertilization advice.
10. Stake the vines of your cool potato plant. The vines of cool potatoes grow very long, so they need support as they grow. You should insert stakes into the soil 10 centimeters deep next to the cool potato plants, and then tie each plant loosely with twine. When it vines are about 60 centimeters long, secure them to the stake.
11. Check the land where you planted the cool potatoes for drought every day. Keep the soil moist during the growing process of the cool potatoes. You can check if the soil is dry by touching the soil with your hands or digging it gently with your fingers. Only when the soil is dry, then water it, as overwatering the cool potato can also prevent it from growing properly.
12, Remove the small flowers from the cool potato plant, removing the flowers will promote the growth of the root system, you can remove them with your hand or scissors.
13, don't worry too much about pests during the planting of cool potatoes. Pests are generally not a problem during the growing process of cool potatoes, this is because its flowers, seeds and leaves are poisonous. If you do find that you have a pest problem, you can just manually remove the pests yourself or use an organic pest spray to kill them. When you go to buy a pest spray, make sure you know what kind of pests you are trying to eliminate.
14: To harvest a cool potato, dig its tubers out of the ground. Dig the tubers out of the soil with a shovel and wait until late fall, but dig your tubers before the first frost, which will be about 150 days after planting. If the vines of the cool potatoes show signs of wilting, then dig up the tubers earlier. Don't rush when digging to avoid damaging the tubers, which should be 7.6 to 15.2 centimeters in diameter for mature cool potatoes. Gather the dug-up tubers, soak them gently in water, remove the silt or mud and then dry them. The tubers should be firm and round; if they are soft and wilted with visible cracks or bruises, throw them away.
15. Storage of cool potato tubers. If cool potato tubers are stored below 10 degrees Celsius they will spoil, ideally they should be stored at 11 to 15 degrees Celsius, which could be in a garage or heated basement. The location you choose should be dry and not damp. You can store it in a pot, on a shelf or in a pan, and if stored properly, the cool potatoes should be fresh for the duration of two months.