- 1). Select the Campanula variety that best fits your needs for indoor growing. Good varieties to grow as houseplants include the Italian bellflower, a trailing plant that looks lovely in indoor hanging baskets, and the pouffe bellflower--Campanula lactiflora--which forms into a dense mound and grows well in indoor containers. The double miniature Campanula, or haylodge bellflower--which features delicate blue blossoms that have been likened to dollhouse roses--is also a good choice.
- 2). Pot your Campanula in a good-quality potting mix, in containers or baskets that provide ample drainage.
- 3). Affix a fluorescent grow light 6 inches over your Campanula to provide it with proper conditions and keep it on at least 13 hours a day. To really thrive, especially in the winter, Campanula need more light than can be afforded by a sunny windowsill.
- 4). Water to keep soil evenly moist but not soggy. Water should be at room temperature; if you use tap water, let it sit for 24 hours to remove undesirable chemicals.
- 5). Feed your Campanula every 12 days through the flowering period with liquid fertilizer for blooming plants. In the winter, dilute the solution to half the recommended strength; in late spring, return to normal feedings.
- 6). Point a fan above your Campanula to provide proper air circulation. The fan should point over the tops of your Campanula plants, not directly at them. A ceiling fan is fine for this purpose but run it at the lowest setting.
- 7). Deadhead your Campanula regularly to promote blooming. When all the blooms have died, prune the plant down to an inch above the soil and let it re-grow; it will quickly bloom again.
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