There are more varieties of mint than Carter has little green liver pills. Chocolate mint, Banana Mint, Lemon Mint, Corsican Mint, Moroccan Mint, Egyptian Mint, Pineapple Mint and one of my personal favorites, Lavender Mint.
When not in bloom it also serves as eye candy grown as a ground cover or in a more restricted locale. Its lush green foliage and reddish purple stems are also visually appealing. In my Opinion, not harvesting lavender mint is a total waste of a tasty plant.
Although it is possible to grow mint from seeds, it is not advisable, success rate is low and frustration levels high. It is so much easier to grow via cuttings or root divisions if you do not have access to a plant. If you do not have access lavender mint is sometimes available at nurseries and is available at online nurseries.
Lavender mint is not drought tolerant and fades rapidly in extreme hot weather if not kept watered, it does best in cool temperatures. It will grow in full sun, however if you live in a hot region partial shade is best. It is also not drought tolerant so should be kept well watered. It will survive some dry spells, but not too often.
Grown as an herb they are unusual and unique in their contribution to any culinary arsenal. They have a minty floral flavor reminiscent of lavender from whence it draws it name. When using lavender mint one should keep in mind that a little goes a long way, a few sprigs of lavender mint is usually all it takes for most recipes. I at times will combine it with another mint, such as peppermint to increase the menthol flavor of the dish while not getting too much of the lavender. Used in excess it can be over powering.
Mint varieties when grown close to one another have a tendency to cross pollinate. This end result is usually undesirable so it is advisable to keep various mint varieties a safe distance from one another.
Mint will spread prolifically if left unchecked. All mints have the tendency to become invasive, lavender mint is no exception. Once established it will vigorously spread via its underground stems so you'll need to maintain its spread in order to prevent it from overtaking neighboring plants.
Keep the plants in check by harvesting the tips on a regular basis and removing renegade runners. Small flowers bloom from June to September, you should trim these before the buds open to keep the plant compact and manageable.
Another method of controlling mint plant is using bottomless containers 12 - 15 inches in depth and sunk in the ground with one or two inches protruding above the soil surface. Another is to plant them above ground in containers.
A layer of mulch in the Autumn will help protect them in their winter dormancy.
Plants grown in full sun tend adopt an upright growth pattern, if grown in partial shade, which they tolerate, they tend to sprawl along the surface and create a ground cover.
Fertilizer is not necessary so long as the soil is reasonably fertile, not sand and certainly not clay. If your soil is abysmal Modest amounts of fertilizer can't hurt. Fertilize in early Spring and then every fifth week thereafter with a balanced fertilizer. No more than 3 X per season and in Modest amounts.