Bulbs Tolerant of Juglone - Knowledgebase Question

Washington, WA
Question by jteeuwen
July 4, 1999
I'd very much appreciate if you could send me a list of bulbs, mainly Tulips and Narcissus, that are black walnut toxin tolerant.


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Answer from NGA
July 4, 1999

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Both tulip and narcissus are tolerant to juglone, the growth inhibiting chemical from walnut trees. Other bulbs considered tolerant are hyacinth and grape-hyacinth. The most sensitive bulbs are autumn crocus and lily. Avoid these and your spring flowering bulb garden should thrive.

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