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Mar 28

Downy Mildew on Impatiens

Posted by Plant Crazy on Friday, March 28, 2014

As some of you may have heard, Downy Mildew has struck here in Nova Scotia. For those of you who don't know what Impatiens Downy Mildew is ..... It is a disease that affects impatiens in nurseries and in your gardens.

Downy Mildew has wiped out Impatiens sales in the US almost completely and is about to do the same here. There is no 'sure fire' control for it at this point but there are studies being done with specific fungicides that may eventually be used as a preventitive. Fungicides will not cure downy mildew once it has infected the plants.

You may see impatiens in garden centres this year but beware; they may look great when you buy them but after a few weeks in the garden there might be nothing left but bare stems. Downy Mildew causes both the flowers and the leaves to drop, eventually the stems will collapse as well.

If you suspect that your Impatiens are infected, totally remove the whole plant (roots too) and dispose of them in the garbage. Do not put them in your compost.

Downy Mildew only affects Impatiens Walliriana which is the single flower type sold in 6 packs and Double Impatiens usually sold as singles. Downy Mildew does not affect any other plants but Impatiens.

The best subsitutes for Impatiens are Tuberous Begonias, Coleus and New Guinea Impatiens (highly resistant to Downy Mildew)

There is lots of great information and images on the web if you are interested.

Oceanview has chosen to cut our Impatien crops down greatly. We will only be growing a small amount for those of you who still wish to plant them.We have also taken measures to decrease the cost of begonias and New Guineas. Any further questions please email us at