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10 Onion Companion Plants Q&A

1. What is the most important benefit of onion companion planting?

The primary benefit is pest control. Onions repel a wide variety of pests, including aphids, carrot rust fly, onion flies, and beetles due to their strong sulfur scent. This helps protect nearby vulnerable plants.

2. Can I plant onions with everything in my garden?

No. You should avoid planting onions near legumes like peas and beans. Peas fix nitrogen, but onions can interfere with this process and inhibit the growth of the pea plants. Asparagus is another plant that does not grow well together with onions.

3. Do onions need full sun?

Yes, onions grow best in full sun. However, they can tolerate some partial shade provided by taller companion plants like tomatoes or peppers, especially in very hot climates.

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