Botanical Name: Calibrachoa × hybrida ‘Superbells® Lemon Slice’

Common Name: Calibrachoa, Million Bells

Hardiness Zone: Annual in Most Climates

Size: 6–10" Tall × 12–18" Spread

Growth Habit: Trailing, Mounding, Well-Branched Habit

Sunlight: Thrives in Full Sun

Soil: Prefers Well-Drained, Fertile Soil

Water Needs: Moderate; Allow Slight Drying Between Waterings

Bloom Season: Spring through Frost

Fertilizer: Regular Feeding with a Balanced or Slightly Acidic Fertilizer

Features: Bright Yellow Flowers with White Star Pattern, Extremely Showy, Heavy Flower Coverage, Excellent Heat Tolerance, Self-Cleaning

Uses: Ideal for Hanging Baskets, Containers, Window Boxes, and High-Impact Color Displays

Patent: ✔ Patented

Propagation: ❌ Propagation Prohibited Without License

See our complete Calibrachoa Plant Guide for more in depth care details.

More About Calibrachoa ‘Superbells® Lemon Slice’

Calibrachoa ‘Superbells® Lemon Slice’ is one of those Calibrachoa that almost everyone recognizes, even if they don’t know its name. The bright lemon-yellow blooms are boldly accented with a crisp white star pattern, creating a high-contrast look that jumps out from across the garden. It’s cheerful, energetic, and unapologetically bright—exactly the kind of plant that makes containers feel alive the moment they’re planted. What I appreciate most about ‘Lemon Slice’ is that the color isn’t fleeting. That yellow stays clean and vibrant rather than dulling or muddying as the season progresses, and the white star remains sharp instead of blurring together. 

As part of the award-winning Superbells® Series, ‘Lemon Slice’ brings more than just good looks. It’s bred for vigorous growth, strong branching, and season-long flowering, and you can see that in how quickly it fills containers and baskets. The habit is balanced and trailing, spilling neatly over the edges without getting leggy or thin, and it keeps pushing blooms from early Spring straight through frost.

Why We Like It (Our Trials)

In our trials, ‘Superbells® Lemon Slice’ has consistently been one of those plants that makes everything around it look better. I remember the first year we used it heavily in mixed containers near our entrance. Even early in the season, before most combinations had fully filled in, ‘Lemon Slice’ was already doing the heavy lifting—brightening the planting and pulling the whole container together. Even during long stretches of summer heat, it keeps blooming without slowing down or thinning in the center. I’ve watched it sail through conditions that knocked other varieties back a step, and it never seems to lose its enthusiasm.

The yellow-and-white pattern pairs beautifully with blues and purples—especially deep purples and true blues—where it really pops. I’ve also used it alongside white flowers and deep green foliage for a cleaner, more classic look, and it still shines. One season, we paired it with blue salvia and dark-leaf coleus in large containers, and those pots stayed sharp and high-contrast all summer long without needing much intervention.‘Superbells® Lemon Slice’ is a classic for a reason. It’s bold, reliable, and endlessly useful in design. When I need a plant that brings brightness, energy, and consistency all season long, this is one I reach for without hesitation.

Lemon Slice vs. Other Calibrachoa Varieties

Superbells® Lemon Slice is the most graphic and pattern-driven selection in the Superbells® Series, relying on bold contrast rather than depth of color for its impact. Compared to warm-toned varieties like Coral Sun or Tangerine Punch, Superbells® Lemon Slice feels noticeably cooler and more structured, replacing warmth with crisp definition. When placed beside Superbells® Watermelon Punch, it trades Watermelon’s soft, blended tones for sharp pattern and visual clarity. Compared to double-flowered options like Superbells® Double Amber, Lemon Slice sacrifices fullness and texture in favor of clean lines and immediate visual punch.

Outside the Superbells® family, Lemon Slice continues to stand apart. Compared to Cha-Cha™ Tangerine it reads more intentional and composed, with less playful movement and more deliberate design impact. Other Calibrachoa like our Cabaret® Selections rarely push contrast to this degree, which allows Lemon Slice to occupy a unique niche within mixed containers. Paired with Colibri® Pure White, its pattern becomes ultra-clean and architectural. Set next to Caliloco Dracula, Lemon Slice feels bold in an entirely different way—less theatrical and moody, and more graphic, modern, and sharply defined.