Regular deadheading of spent blooms will also help encourage additional blooming. Indoor or potted plants may require repotting once they become overgrown, usually noted by wilting between waterings. Use a water-soluble houseplant fertilizer or a 5-10-5 fertilizer with additional organic matter every four to six weeks throughout their active growing season. In addition to watering, which should be done deeply and once the soil begins to feel dry indoors or at least weekly outdoors (though potted plants may need daily watering in hot weather), fertilizing is usually necessary. Whether indoors or out, geranium care is pretty basic. Mulching the plants is also recommended to help retain moisture. Space plants about 8 to 12 inches (20-30 cm.) apart and around the same depth as their original planting pots. Since these plants must be protected from cold, wait until the threat of frost has passed before planting. Locate your geraniums in an area with at least six to eight hours of sunlight. When growing geraniums outdoors, they require moist, well-draining soil similar to that of indoor potting soil with equal amounts of soil, peat, and perlite. These plants need to be grown in well-draining potting soil as well. (18-21 C.) during the day and 55 degrees F. They also need indoor temps of around 65-70 degrees F. Indoors, geraniums need lots of light for blooming but will tolerate moderate light conditions.
How to Grow GeraniumsÄepending on where or how you grow geranium plants, their needs will be somewhat different. Growing geranium plants is easy as long as you can give them what they need. Geraniums ( Pelargonium x hortorum) make popular bedding plants in the garden, but they’re also commonly grown indoors or outside in hanging baskets.