OT: Gray dust on my rosemary plant

[LaraW]

I have discovered that there is a grayish dust on the leaves of my rosemary plant. Does anyone know what this is? Is it some kind of disease or something? It seems to brush off easily, but I was just wondering. I have never seen this before.

Thanks

Lara

[lsdesign]

Yes, I've had experience with this. It's a mold that attacks rosemary. It supposedly happens because of a lack of air circulation. You will need to buy something to kill the mold. I can't remember the name of the stuff I bought, it was several years ago now, but ask at any gardening center.

[SusanT]

Be sure you tell the garden center that you're using the fungicide on rosemary. You want to make sure that it's safe for use on edible plants.