Q.Zone 2 Manitoba, Canada
When is it safe to start veggie seeds outside in a garden box?

Downtoearthdigs
Answered on May 3, 2016
I would be careful with tender seedlings and not place them out in a cold frame or garden until after the last frost date.
Remember the dates are guidelines and you will need to monitor the weather trends.
http://www.plantmaps.com/interactive-manitoba-last-frost-date-map.php
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