Cosmos may not be hosts for larvae but I've seen loads of adult insects on mine looking for nectar and pollen. I'm not too fussed about them as plants and only use annuals as colourful fillers but OH loves them so it' s a win-win plant in our garden..
Vendée - 20kms from Atlantic coast.
"The price good men (and women) pay for indifference to public affairs is to be ruled by evil men (and women)."
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Cosmos may not be hosts for larvae but I've seen loads of adult insects on mine looking for nectar and pollen. I'm not too fussed about them as plants and only use annuals as colourful fillers but OH loves them so it' s a win-win plant in our garden..