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.

Answer from NGA
July 4, 1999


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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