What could it be? Powdery mildew?
Powdery stuff on my Pincushion Flower...
does it look like this?
http://ohioline.osu.edu/hyg-fact/3000/3047.html
Yep - that's it!
A while back, someone posted that they spray diluted milk (fresh or powdered, mixed with water - something like maximum 3 parts water to 1 part milk, down to 8 parts water to 1 part milk) plants for control of powdery mildew. The stronger the concentrate, the more likely you are to get a rancid/sour milk smell wafting from your flowers ;o)
From the book "Trowel & Error" by Sharon Lovejoy
1 cup milk
9 cups water
Shake well & pour into spray bottle. Apply to infected plants twice weekly. Refrigerate between uses.
Also she lists two other "potions" for mildew.
Garlic Spray
1 gallon water
20 TBSP (1¼ cups) garlic powder
Pour into spray bottle and apply to plants early in the morning.
Spicy Cinnamon Spray
¼ tsp cinnamon
1 quart warm water
Pour into spray bottle and drench both sides of leaves early in the day.
Hope one of these helps. Brenda
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