How to Rebloom Kalanchoe After Purchase — Forcing New Flowers

Your store-bought Kalanchoe finished blooming and now just grows leaves. Trigger a new flush of colorful flowers with this short-day treatment reblooming method. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Kalanchoe blossfeldiana is a short-day plant that needs 14+ hours of darkness to initiate buds. Store plants are bloomed in controlled greenhouses with artificial dark periods. At home, you need to manually provide the dark treatment for 6-8 weeks in fall. Once buds appear, return to normal light and the flowers will open in 2-4 weeks. Kalanchoe can be rebloomed repeatedly — it is a perennial, not a disposable plant. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Without the dark period trigger, Kalanchoe will grow foliage but never set flower buds. Modern homes with artificial lighting throughout the evening disrupt the natural short-day trigger. Many people treat Kalanchoe as disposable after the first bloom — they can bloom for years. Understanding the short-day requirement is the key to successful reblooming. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: After the current bloom finishes, remove spent flower stems and let the plant grow for 2-3 months. In early fall, begin the dark treatment: 14-16 hours of complete darkness daily for 6-8 weeks. Use a closet or box to block all light — even brief light interruption resets the process. During the dark period, continue watering normally and provide 8-10 hours of bright light during the day. Once small buds are visible at the growth tips, return to normal light — flowers open in 2-4 weeks. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Flowering Plants collection on Houseplants Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.