Mimulus, also called monkey flower, is an annual that is known for its bright flowers that are shaped like funnels. The flower colors include white, yellow, orange, red and multicolored varieties. They can be grown in USDA zones 6 to 9. The seeds are planted in the early spring, though they can be started indoors and transplanted later in areas that have cold spring weather. They will flower from July through October.
Place mimulus seeds into a plastic bag that contains potting soil or peat moss and place the bag into the refrigerator about two months before you plan to plant them outside. Keep them there for three weeks. This will give you plants that bloom earlier than they would if they were planted outdoors.
Plant the seeds in an indoor plant pot when the seeds are removed from the refrigerator. Fill a small plant pot with potting soil. Place the mimulus seeds on top of the soil and moisten the soil.
Put the pot in a windowsill or under a grow light to give it the light the seeds need to germinate. Water the soil lightly to keep it moist. The seeds will begin sprouting in about two to four weeks.
Take the mimulus seedlings outdoors once the last frost has passed. Mimulus plants do not tolerate frost. Keep them outdoors in the afternoons to help them to get used to the new environment.
Choose an area that gets full or partial sunlight, and plant the seedlings there after a few weeks. Each mimulus plant should be 9 to 12 inches apart. If you live in a hot climate, your mimulus will need shade in the afternoon.
Water your mimulus plants often to keep the soil moist. Put mulch around the plants to keep the soil moist in between waterings.
Fertilize your mimulus plants once a month with an organic fertilizer. Take care not to let the fertilizer touch the leaves of the plant.