Potatoes do not grow well with other plants. Take good precaution when planning your vegetable garden. When planting potatoes, you should avoid the following:
Apple, peach, and cherry trees. Fruit trees like peach, apple and cherry often attract blight, a disease that can decimate a potato crop. If you have peach, apple or cherry trees in your yard, plant your potatoes far away from them.
Cucumbers. Cucumbers are heavy feeders that take up a lot of water, if planted next to potatoes they will compete viciously for the nutrients. In addition, cucumbers may increase the chances of your potatoes becoming diseased with blight. If you want to plant both cucumbers and potatoes in your garden, consider planting them not close to each other.
Eggplants. Eggplants and potatoes are both in the nightshade family, and they crave the same soil nutrients and are susceptible to the same diseases. If you plant eggplants near potatoes, both plants will compete for nutrients and are more susceptible to blight.
Pumpkins. Pumpkins and potatoes are both susceptible to blight.
Fennel. Fennel is a garden crop that does not play well with most other vegetable garden plants. While it can attract beneficial insects, it can also serve as an inhibitor to the growth of other plants – stunting them or even killing them completely.
Raspberries. If planted near potatoes, raspberries are more susceptible to blight.
Root vegetables. Since root crops like turnips, parsnips, and carrots use the same underground space in the garden that potatoes use, growing them together will inhibit the growth of both plants.
Tomatoes. Tomatoes and potatoes are both in the nightshade family, and they crave the same soil nutrients and are susceptible to the same diseases. If you plant tomatoes near potatoes, both plants will compete for nutrients and are more susceptible to blight.