Mojitos are tasty, this is a rarer Cuban mojito mint. Give it a loamy spot that gets good morning light and some afternoon shade (or dappled light). It likes soil that drains well and remains uniformly moist during the hottest part of the day.
Many mints prefer similar conditions, which makes mojito mint pretty predictable if you've grown mint before. Plant them where it rains heaviest, the mints will be the first to receive the bounty, the addition of sand to the soil ensures good drainage. Mojito mint can spread out with vigour, becoming invasive. One way to control the minted sprawl is to give this plant a big pot and then bury the pot in your flowerbed. You'll have decent growth but less risk of its taking over your landscape unless you want that. If you think providing consistent moisture will be a problem, mulch the area around the pot in summer and autumn.
Harvest leaves once the plant is 8 to 10 inches tall. A good rule of thumb is to limit harvesting to a third of the plant at a time. Wait for at least that much growth before harvesting again. Once the plant is established in the garden, this shouldn't be a problem. For the best flavour, harvest leaves in the morning before the hot sun hits them. You can keep stems in a glass of water until you're ready to use them.