Overwintering Calibrachoa from Cuttings: Step-by-Step

Calibrachoa (million bells) can be overwintered from September cuttings. Here's the reliable method:

Supplies

• Rooting powder or gel (Clonex)
• Fresh seed-starting mix or fertilizer-free potting soil
• Clean 2–4 inch pots (soak used pots in 1:9 bleach water)
• Clear plastic bags

Process

1. Pre-moisten mix thoroughly—dry mix repels water.
2. Fill pots, make holes with chopstick.
3. Cut 4-inch stems, strip lower leaves, pinch flowers.
4. Dip stem in water, then rooting hormone; plant in hole.
5. Firm soil, water gently.
6. Cover loosely with plastic (bag or dry-cleaner bag) for humidity; keep in bright, indirect light.
7. No watering under plastic for 7–10 days.
8. Remove plastic, water when surface dries.
9. When new growth appears, move to south window or 5" under fluorescent light.
10. Fertilize weakly monthly through December, then every 3 weeks.
11. Pinch leggy growth. Pot up in March/April. Harden off after frost.

Some cuttings fail—start extra. Success yields free plants for next season.