Curling Cosmo Leaves

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GardeningGreen6 Greenfield, MA Jun 15, 2020

The leaves on my young cosmo plants are curling! I have not seen many leaf hoppers or aphids but I have been treating with neem oil to be safe. Has anyone seen this before?

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Zen_Man Ottawa, KS(Zone 5b) Jun 18, 2020

Hi GardeningGreen,

" ...but I have been treating with neem oil to be safe. "

It's probably a nutrient deficiency. But, regards to that "safe" thing, Neem Oil has been outlawed in the United Kingdom.

https://webarchive.nationalarchives.gov.uk/20151023223913/http://www.pesticides.gov.uk/guidance/industries/pesticides/topics/pesticide-approvals/enforcement/products-containing-azadirachtin-also-known-as-neem-oil

It seems that the chemical azadirachtin that Neem oil contains is a hazard. That is ironic, considering that Organic Gardeners eschew the use of "chemicals".

ZM
(not an organic gardener)

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