how late can i plant collard greens
The worms ate the plant and I need to plant more.
The date you can plant collards is determined both by your location, and the variety you have. Some cold weather is actually good for collards. Check the seed package and count the days till harvest that it lists. This article has more information: https://www.gardeningknowhow.com/edible/vegetables/greens/growing-collard-greens.htm
Here's more information about those pesky worms: https://www.gardeningknowhow.com/plant-problems/pests/insects/prevent-caterpillars.htm
BTW, you can learn your USDA zone by checking this site: https://www.gardeningknowhow.com/planting-zones/usda-planting-zone-map.htm