Where can I get spearmint plants?

Question

Don’t know where I can find spearmint plants.

Answer 1

Try local garden centers, even your local grocery store generally sells some culinary herbs in pots in their produce section.
If you know another gardener in your area; ask for a cutting and start a new plant.
Mint can also be started from seed; there are many reputable seed companies listed on the internet.

https://www.gardeningknowhow.com/edible/herbs/mint/how-to-grow-mint-plants-in-your-garden.htm
https://www.gardeningknowhow.com/edible/herbs/mint/how-to-plant-mint-seeds.htm