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How cold is too cold?

Posted by eugenflorinsgarden 8A (My Page) on
Thu, Mar 21, 13 at 20:01

I have outside some cosmos flowers (seedlings) some beans (just sprouted) and some basil, hot peppers, and mint (haven't sprouted yet).

The tempeture tonight will be at 48 (low). Will this severely stunt my plants? Or even kill them?

Follow-Up Postings:

RE: How cold is too cold?

Sprouted ones need to be brought in or covered if in ground.

45 is the minimum recommended for seedlings, especially peppers, and if the air temp is 48 the ground level temp could easily be 45 or less.

Can you cover them with a blanket or such?


RE: How cold is too cold?

Digdirt, hit it. Plants vary.
I don't consider it "stunting". Plants will wait until the right temperature/light cycle to take off, as long as they are not damaged.
Or just search "cosmos cold tolerance" (example) for each of your plants. One site says cosmos will tolerate 35 degrees.
The link below doesn't really pertain, but you can find similar that might. A lot of studies have been produced on the matter.

Here is a link that might be useful: frost tolerance

RE: How cold is too cold?

Most plants are surprisingly hardy at the early stages as long as they are not left too cold for extended amounts of time. If you are worried about the temperature and already planted just cover the little guys with a sheet or some good plastic overnight. The weather should be warming up pretty fast, and if not just blame that darn groundhog!

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