The Q&A Archives: Do Sunflowers Poison the Soil?

Question: I heard that sunflowers supposedly poison the ground they grow in and you shouldn't plant vegetables near them or in the same soil the following year. If you can plant near sunflowers, how far away? Lori Detroit, MI

Answer: Sunflowers don't exude a chemical that inhibits other growth of plants. If you have a tremendous amount of seeds, such as under a bird feeder, it will cause a nitrogen deficiency and temporarily inhibit growth. But that is quicker remedied with a little nitrogen fertilizer. So, plant away right next to your sunflowers and have no fear!

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