Avoiding leaf burn when using Neem Oil?
I sprayed my violets with Neem Oil last evening; I'm trying to keep down an infection of powdery mildew and thrips.
This morning they have blackened burned edges; not so bad that it will kill the plants, but enough to make them unattractive, esp. if I need to repeat the spraying.
I used a premixed Neem Spray (packaged as Garden Safes Fungicide 3), as no where local had the concentrate. I kept the lights off afterwards and I blotted up any excess that pooled on the leaves.
I still got burned edges on the plants I sprayed.
Is there a way to avoid this? Is the prepackaged spray simply too strong for them? It is a 0.9% solution.
Unless my math is incorrect (which is possible I have a wicked sinus cold right now), 1 TBL of Neem per Gallon, which is what I've seen recommended for violets is about a 0.4% solution. It's a little higher in the premixed spray, but not overwhelmingly so.