Kalanchoe Not Blooming: Repotting and Light Cycle Issues

Kalanchoe Not Blooming: Repotting and Light Cycle Issues

A reader’s Kalanchoe bloomed well until this winter. Fertilized weekly, in a west window. Repotted this year.

Why No Flowers

1. Repotting: Kalanchoes must be very pot-bound to bloom. Repotting prevents flowering.
2. Light cycle: They are short-day plants. In fall, need 6–8 weeks of short days (long nights). Indoor lights can disrupt this.
3. Cool, dry fall: Cooler temps and drier soil in autumn promote bud set.
4. Over-fertilizing: Weekly is too much. Max once/month at half strength.

Genetic Factor

Many sold Kalanchoes are hybrids bred for one massive bloom at sale, then weak flowering thereafter—nothing fixes that.

For a repotting guide, email wcreed@HorticulturalHelp.com.