Three resources for last frost date by area:
(these read between May 2 and May 31 for last-frost for my approximate area).
here’s a map for the UK: http://www.vegetableseeds.net/category_s/153.htm
and another: http://www.gardenfocused.co.uk/adjust-dates-uk.php
Something not entirely clear for Australia: http://www.geocities.com/mastergardener2k/frostaustralia.html
Of course, even with a chart, it helps to look at the weather on a day-to-day basis at the beginning and end of the season.
And I’ve planted some peas and put my first butternuts in the ground.
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