An heirloom variety more than 100 years old with many colorful names such as Blue Marker, Fenton Blue, and River John Blue. With deep blue skin and blue flesh sporting a white ring, tubers are oblong with deep eyes. Excellent flavor used any way – sautéed, steamed, or mashed. Moderate resistance to late blight, hollow heart, second growth, and common scab. Very drought tolerant and may not do well in a wet year. Look for blue blossoms and blue-veined stems on this tall, robust medium-spreading plant. maine potato lady
Late season: Russian blue. 120-160 days. Mid season: all blue.
If you typically have a sweltering summer and a short spring, plant early and mid-season tubers a month before the last projected frost date in your area. Late types should go in the ground around August for a fall harvest.
indeterminate

"Majestic purple flesh inside satiny purple skin beautifully describes this relatively new variety from Colorado. All Blue crossed with a white-fleshed chipping variety has produced a royal potato exceptionally high in anthocyanin, an antioxidant. Oblong tubers make stunning chips or fries. Resistant to most viruses, susceptible to fusarium dry rot. Ideal for early market or summer eating; good for short-term storage only." https://www.mainepotatolady.com/productcart/pc/viewCategories.asp?idCategory=47

"Round to oblong, slightly flattened tubers have glistening blue skin enclosing deep blue flesh without the white vascular ring. The moist, flavorful flesh is superb for mashing or salads; it's a favorite in taste tests. Flesh color holds well, especially when roasted. Very high in antioxidants. Spreading blue-tinged plants have clusters of pure white flowers. Allow 3 weeks for adequate skin set, and handle carefully to minimize bruising and injuries. Very susceptible to fusarium and bacterial soft rot. Very resistant to foliar late blight strain US-23. Moderate storage with short dormancy" https://www.mainepotatolady.com/productcart/pc/viewCategories.asp?idCategory=65

The best time when to plant potatoes is in early spring. Planting potatoes two to three weeks before your last frost date will produce the most satisfactory results.

When growing potato plants (Solanum tuberosum), it is important to keep in mind that potatoes are cool weather vegetables. The best time when to plant potatoes is in early spring. Planting potatoes two to three weeks before your last frost date will produce the most satisfactory results.

Read more at Gardening Know How: How To Grow Potatoes: When To Plant Potatoes https://www.gardeningknowhow.com/edible/vegetables/potato/how-to-grow-potatoes-when-to-plant-potatoes.htm

Plant potatoes in a sunny place with at least 6 hours of directly sunlight each day. The tubers need to grow in fertile, loose, well-drained soil; hard or compacted soil leads to misshapen tubers. Ideally, soil is slightly acid (pH 5.8 to 6.5) and the soil temperature is at least 45º to 55ºF (7° to 13°C). Before planting (preferably in the fall), mix compost or organic matter into the soil.

Garden potatoes can be planted as soon as the soil can be worked. For many gardeners, this is about 2 weeks after the last spring frost. But aware that early crops may be ruined by soil that’s too wet as the potato seeds will rot. Pay more attention to the soil than the calendar to determine planting time. The soil should not be so wet that it sticks together and is hard to work. Let it dry out a bit first. If you have a late and wet spring, you can plant later—through April (depending on location) or even June, especially in containers.

In cooler regions, some gardeners will plant the first crop of “early-maturing” potatoes in early to mid-April, 6 to 8 weeks before the average last frost date. These varieties can withstand frost.

In warmer regions, potatoes can be grown as a winter crop and planting times range from September to February. Where winters are relatively mild, you can plant a fall crop in September. For example, in central Florida, gardeners plant potatoes in January, and in Georgia they plant in February.

One to 2 days ahead of planting, use a clean, sharp paring knife to cut large potatoes into golf ball-size pieces, with 1 to 2 eyes each. This time allows the pieces to heal, or form a protective layer over the cut surface, improving both moisture retention and rot resistance. Do not cut up seed potatoes that are smaller than a hen’s egg; plant them whole.

https://www.almanac.com/plant/potatoes

potassium

https://www.youtube.com/watch?v=co6iW_ji6sU

https://www.youtube.com/watch?v=it_50DvgXy4
Not much difference in yieled with sifferent planting style. but 10% difference.

https://www.youtube.com/watch?v=JrytUqXE9Ns
remove flowers as you see tem. harvest when 50% off leavesa re yellow and dying off.
use lots of potassium
use 30 l pot
indet vs det
blood and bone meal
https://gardenerspath.com/plants/vegetables/early-mid-late-potatoes/
https://www.mainepotatolady.com/pdf/growing-potatoes.pdf

"I do love this name; it conjures up images of beauty and magic, right out of the garden. And when these beauties emerge from the earth, it is indeed like magic. Dark purple skin and purple, almost black flesh are quite vivid. Long tubers are firm and slightly waxy, with an earthy flavor. Good yields and some field resistance to late blight. A seedling of Red Beauty developed by Bill Campbell of Alaska."
potato lady