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What's wrong with my basil?

Posted by kate4581 none (My Page) on
Sun, Sep 8, 13 at 18:26

Let me preface with I am completely new to gardening and live in a townhouse so I have to use containers. Lots of the leaves of black dots on the underside, or get brown and rotten while other leaves are OK.

Follow-Up Postings:

RE: What's wrong with my basil?

Too far away to see details.

RE: What's wrong with my basil?

Sweet basil is too disease prone. In contrast Asina basils (Thai, cinnamone) are tough. I have several kinds. Sweet basils are all sick but the others are doing just fine.
No more sweet basils for me next year.

RE: What's wrong with my basil?

Can't tell much from the photo, but it sounds like downy mildew. It spreads extremely easily, and thrives in humid conditions. I had it wipe out 8 sweet basil plants, it eventually infected my thai, cinnamon, and purple basils. I had limited success pruning any leaves showing any sign of infection, and keeping them as separate as possible. A few heat waves helped minimize it popping up on leaves again, but it's tough if not impossible to get rid of short of starting containers over.

Here is a link that might be useful: Cornell University Warning of Downy Mildew

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