1. Plant in potting soil
African violet plants need a light, airy medium around their roots to allow for good air circulation. It’s best to buy a commercial potting soil or to make your own. Some places, like The Plant Expert, recommend mixing extra peat moss and vermiculite or perlite into the potting soil to make it even lighter.
2. Give them the right growing requirements
Direct sunlight will burn the velvety leaves on an African violet. They prefer bright, indirect sun from a south or east facing window. In winter months it may be necessary to put your plants under a grow light to give them the exposure they need to bloom. Contrary to popular belief they do not grow best in warm conditions. Like other houseplants, they do well at temperatures between 55 and 75 degrees. Avoid placing them in drafty areas where the nighttime temps drop below 50-55 degrees.
3. Keep soil moist
African violets should be watered as soon as the top of the soil feels dry to the touch. Use only room temperature or slightly warmer water when watering your plants taking care to keep water off of the leaves. Water that is cooler than the leaves will cause leaf spotting; it’s not all water like people tend to think. They like fairly humid conditions; if you live in a dry climate group plants together to create a microenvironment that stays a little moister or place pots on a tray of pebbles that is kept watered.
4. Fertilize often
To keep your African violet blooming, it’s important to keep it fed well. A low-nitrogen, high-phosphorus fertilizer blend will encourage bloom production while limiting vegetative growth. There are many violet-specific products available on the market but it isn’t necessary to purchase one if you can’t find one locally. A well-balanced, high-quality fertilizer will work just as well. It is recommended to fertilize plants lightly every time they are watered to provide continuous food.
5. Remove old blooms
African violets will bloom constantly throughout the year if cared for properly. One of the most important tips is to pinch off or remove spent blossoms. This will encourage the plant to produce new buds instead of trying to send its resources to the dead tissue.
6. Repot plants periodically
Over time the nutrients in the potting soil will become depleted as the roots absorb them for use by the plant. Refresh the potting mix by repotting your African violets once or twice a year. More often than not the pot size doesn’t need to change and won’t exceed 4-5″ in diameter. Real Country Living provides a step by step set of instructions on how to repot your plants for optimum growth.