Superbells® Holy Cow! Calibrachoa

Superbells® Holy Cow!™ is a mounding, trailing calibrachoa with a light base patterned by pink splashes and a yellow eye. The compact annual is designed for containers and hanging baskets, where its abundant flowers and trailing stems create a bright, long-season display, as shown in the [Proven Winners cultivar profile](https://www.provenwinners.com/plants/calibrachoa/superbells-holy-cow-calibrachoa). ## Flowers and placement Proven Winners describes the exact cultivar as flowering from spring through fall, with a mature height of 6–12 inches, a spread of 12–24 inches, and stems trailing up to 24 inches. The breeder lists pink, white, and yellow in its flower palette. The distinctive pattern suits a basket or patio pot where individual blooms can be seen up close. ## Growing conditions Choose full sun to part sun and a well-drained, acidic potting mix. [UMN Extension](https://extension.umn.edu/garden-and-home/yard-and-garden/gardening-in-minnesota/calibrachoa) recommends pH 5.0–6.5 for calibrachoa. Keep the mix evenly moist but avoid waterlogging; containers dry quickly, while soggy roots can rot. Feed regularly during active growth. Calibrachoa flowers are self-cleaning, so spent blooms do not need routine removal. ## Seasonal display Use Holy Cow! as a trailing color accent in warm-season combinations. The breeder lists USDA zones 9–11 and flowering through hard frost; in colder climates it is treated as an annual. Proven Winners notes that hummingbirds may visit the flowers. ## Maintenance Calibrachoa flowers cleanly without routine deadheading. Let the potting mix dry slightly between thorough waterings, but do not allow severe wilting; baskets may need frequent checks in hot weather. Feed regularly during active growth. If stems stretch or become uneven by midsummer, shorten the longest shoots lightly and follow with water and fertilizer.