1、 Stem difference

The stem of spearmint is a little longer, there is no hair on it, the color is mostly green, with leaf grooves and stripes, and the undeveloped branches grow close to the ground

The stem of peppermint is shorter, with concave grains, many pilose hairs and many branches

2、 The difference between leaves

There is no petiole in the leaves of spearmint, which is in the shape of oval oblong or needle. The front of the leaves is relatively sharp, it is a little round at the base, and there are serrations at the edge of the leaves. Its color is green above and grayish green below

The leaves of mint are oblong lanceolate and slightly soft

3、 The difference between flowers

The flower of spearmint grows on the stem or branch, and its flower color is purple or white

Mint flowers are small and purple in color