Emmet Cummings wrote:

I have over a dozen heads of Iceberg Lettuce with about half having formed
a head. Now that
temperatures seemed to have settled in the eighties and sometimes nineties
here in NYC should I
start harvesting? I read that sometimes the lettuce can get bitter?

Thanks,
Rob

Yes. In the high heat the lettuce will 'bolt' (put up a seed stalk) and turn
bitter. Moreover, the stalk will come right up through the center of the
head and possibly ruin it for other purposes.

Bill
--
I do not post my address to news groups.