How to Get Gardenias to Bloom

Overview

Gardenias are rather specific in their cultural requirements, and when their basic needs are not met, annual bloom can be minimal or skipped entirely. Gardenias require ample fertilization, bright filtered or indirect sunlight, specific overnight temperatures and ample moisture but not too much. Creating the optimal growing environment will help to induce a flowering cycle each year.

Step 1

Position your gardenia plants in a location where they will receive bright filtered direct sunlight or bright indirect light. When grown indoors, give gardenias bright direct sunlight during the winter and spring months and bright indirect or filtered sunlight the rest of the year to prevent leaf burn.

Step 2

Maintain daytime temperatures in the range of 68 to 74 degrees F and an overnight temperature of 60 to 62 degrees F to set buds for bloom.

Step 3

Water your gardenias regularly to keep the soil moist at all times but not soaking wet. Water at the soil line around the root ball of the plant and never over the head of the plant to prevent leaf spot and disease.

Step 4

Feed your gardenia once each month during the peak growing season from spring through mid-fall. Use an acid-rich formula complete fertilizer designed for gardenias, camellias or rhododendrons for garden grown gardenias such as a 30-10-10. Feed with a water-soluble balanced plant food such as a 10-10-10 when growing your gardenias as indoor plants.

Things You'll Need

  • Acid-rich fertilizer
  • Balanced houseplant fertilizer

References

  • U.S. Department of Agriculture: Growing Gardenias
  • Cornell University: Why does my gardeia fail to bloom?
  • University of Rhode Island: Gardenia Care
Keywords: supporting bloom in gardenias, encouraging gardenias into bloom, induce gardenia shrubs to flower

About this Author

An omni-curious communications professional, Dena Kane has more than 17 years of experience writing and editing content for online publications, corporate communications, business clients, industry journals, as well as film and broadcast media. Kane studied political science at the University of California, San Diego.