Oregano leaf tips turning brown/black
Don't know what to do: my oregano has been growing beautifully, but this past week I've seen almost all the leaf tips turn brownish-black, and then the brown/black color spreads inward until they completely die and fall off. I had tried to get rid of all the affected leaves, but I'd come back later that same day and even more leaves would have it.
What is it? Do I just toss the plant at this point? Can I salvage it? I've moved it a yard away from my other potted herbs.