Whether potatoes are poisonous or not is not directly related to the place where they are planted. Potatoes are edible as long as they are planted correctly and carefully. You can punch in on the balcony and eat ordinary potatoes.
First of all, potatoes don't need pruning. Second, fertilization. Make some plant ash to make foliar fertilizer and sprinkle it on potato leaves. When spraying water, it can also be handled as appropriate. You can buy some potassium dihydrogen phosphate solution to spray potato seedlings. The third point is to cultivate the soil. You need to cultivate potato seedlings every other week, and you need to cultivate the soil three times at a time.