There are hundreds of varieties of mint but the most common and popular mints for commercial cultivation are peppermint , native spearmint , Scotch spearmint , watermint, cornmint and apple mint
​​ Spearmint grows to about 3 feet high, with open spikes of pink or lilac flowers and stalkless leaves; it has the characteristic mint fragrance
Peppermint , a hybrid between spearmint and watermint, has a heavy scent, stalked leaves, and reddish lilac flowers in dense spikes.
Water mint commonly grows in ditches and has rounded flower spikes and stalked hairy leaves.
Wild mint native to North America and Eurasia, reaches about 3.3 feet high.