I live in south central Wisconsin, zone 4, and have several types of herbs that are in containers growing in my basement for the winter. When can I take them outdoors? What is the lowest temperature they can tolerate?
Certified GKH Gardening Expert
You can put them outdoors after all threat of frost or freezing temps have passed in your area. This article will help determine the hardiness for plants in your zone: https://www.gardeningknowhow.com/planting-zones/wisconsin-planting-zones.htm