Companion Planting for Potatoes
Companion planting is a time-tested gardening method that places plants together for mutual benefit—naturally boosting growth, discouraging pests, and even improving flavor. Potatoes have some great allies and a few plants best kept at a distance.
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Best Companions for Potatoes
- Beans and Peas: Fix nitrogen in the soil, supporting healthy potato growth.
- Cabbage Family (Cabbage, Kale, Broccoli): Benefit from similar soil conditions, and their presence can help deter pests.
- Corn: Returns organic matter to the soil post-harvest.
- Marigolds and Nasturtiums: Their scent deters aphids, potato beetle, and other pests and attracts pollinators and beneficial insects.
- Horseradish: Planted at the corners of the potato patch, it’s believed to boost potatoes’ disease resistance.
- Herbs (Chamomile, Basil, Parsley): Improve soil quality and attract beneficial insects.
Plants to Avoid Near Potatoes
- Tomatoes, Eggplant & Peppers: All are nightshades like potatoes and susceptible to the same diseases, especially blight.
- Cucumbers, Pumpkin, Squash: Compete for space and nutrients, and don’t offer substantial benefits.
- Sunflowers: Can stunt potato growth due to certain chemical exudates.
- Raspberries: Increase the risk of blight.
How to Plan Your Potato Companion Bed
- Alternate potato rows with beans, cabbage, or marigolds for a pest-reducing patchwork.
- Add a border of nasturtiums around the potato bed for trap cropping (attracting pests away).
- Grow horseradish at the corners, but don’t place it in the main patch—horseradish spreads.
Tips for Companion Planting Success
- Don’t overcrowd: Leave enough space for airflow to prevent fungal disease.
- Rotate crops each year to reduce pest problems.
- Combine with mulch and regular weeding for even healthier plants.
Bonus: Try Intercropping
- Quick greens like lettuce or spinach can be grown between potato rows and harvested long before potato foliage overtakes the space.
- Early radishes or spring onions give way as potatoes expand.