While clipping a stem from an existing Vietnamese mint plant, choose a segment with visible roots. Propagating the plant should take about 3-4 weeks. [3] X Trustworthy Source Missouri Botanical Garden Oldest botanical garden in the U. S. and center for botanical research and science education Go to source
Vietnamese mint prefers loamy, slightly acidic soil. [5] X Research source As an alternative, you can also grow Vietnamese mint indoors. Fill a large pot with loamy soil and place it next to a window that gets plenty of sunlight.
Because Vietnamese mint is known to grow in shallow water, overwatering the plant is usually not an issue.
Never fertilize your plant more than twice a month, as overfertilizing Vietnamese mint can compromise the taste. [8] X Research source Liquid seaweed fertilizer is especially effective for fertilizing Vietnamese mint. [9] X Research source
Prune your Vietnamese mint at least once or twice monthly, or whenever you notice its long stems growing out of control. Pruning Vietnamese mint also keeps it bushy and growing vigorously. [10] X Research source
Aphids can cause misshapen, curling, stunted, or yellow leaves. [12] X Research source Spider mites can cause stippled leaves, which later turn yellow or reddish and drop off. [13] X Research source
The best time to harvest Vietnamese mint is in the late spring and summer, so plant your cutting at least one month before early summer.
If you have a sprinkler system, keep its watering schedule in mind so you can water the Vietnamese mint before or several hours afterward.
If you do not have gardening shears, a sharp pair of scissors can work as well.
Taking the flowers off will help the plant conserve its energy for growing leaves, not flowers.
