There are couple things you must remember when planting seed potatoes, one of them is crop rotation.
Crop rotation is a must with potatoes. Potatoes should not be planted in the same area of the garden each year; the entire crop could be lost. Tomatoes, potatoes, peppers and eggplant are all in the nightshade family. They tend to get the same disease and insect problems. For instance, early blight can be a devastating problem for both potatoes and tomatoes. Rotate with a crop other than those, such as beans, squash or corn. This type of rotation will help control the common diseases and insects. Potatoes will yield more and their quality will be improved with rotation.
Treat your garden to generous amounts of organic matter: cover crops, leaves, straw tilled in every year. Potatoes love fertility: composted manure is wonderful. Mushroom compost and organic planting mix can be used as well. Any of these added to your soil will help promote plant health. Use the best certified seed potatoes available. The reason I say plant certified seed potatoes and not store bought or saved tubers is that they may carry and spread bacterial, fungal and viral diseases to the rest of your garden.
The best soil acidity range for potatoes is between 4.8 and 5.4 pH. On soils with a pH of 5.5 to 7.0, the potatoes can be infected with a disease called scab. Lime should not be used unless a soil test indicates a pH below 4.8. Potatoes are the only vegetable for which this pH is recommended.
Warm seed potatoes or greensprout prior to planting. Green Sprouting is a method you can use to try to produce potatoes earlier than their normal maturity date. It has been practiced in Europe for years. By green sprouting you will be able to harvest 2-3 weeks earlier.
Five pounds of seed potatoes will plant 40-50 feet rows. Five pounds of fingerling seed potatoes will plant about 120 feet of row. Cut seed potatoes into large chunks, containing at least two eyes. You can plant the entire seed potato if you want to but you can get many more plants if you cut them. Let the cut ends scab over before planting. Planting shallowly will help with faster growth. Plant 1" deep, hill soil around plants 2-3 times beginning when they are 4-6 inches high. Top dress with organic granular vegetable fertilizer after planting. Use mulch, like straw to promote more growth above the soil level. Regularly handpick and control insect pests. If you must use a spray for pests or diseases please use an organic product. Harvest anytime you please after potatoes reach marble size. To harvest for storage, wait until the tops are completely dead. Then dig and store in moist, dark area, 40° (best) to 50°.
Ever think of growing a few potato plants in bushel baskets, old wooden crates or smart pots (an aeration container)? Well, you can — it's easy and fun. You can be a potato grower in the smallest yard or even on your back porch or patio.
Line a bushel basket/crate with landscape fabric or plastic, if plastic punch a few holes in the bottom. Use a good organic potting soil or planting mix. Put a 4 or 5 inch layer of soil in the basket and lay a few seed pieces 6 to 8 inches apart, then top with 3 or 4 more inches of soil. You may top dress with an organic granular fertilizer or add some to the container when planting. Keep the container in a warm, sunny place. As the plants grow, add more soil around the stems to give the potatoes room to grow and water the container when needed.