The Leaf Index
Vol. IA field guide to cannabis cultivarsleafly.cc
No. 6679Hybrid

Kc 42 by Kc Brains Holland

New Zealand Sativa × Thai Sativa

KC 42 is a sativa-leaning hybrid developed by KC Brains Holland, a breeder recognized for resilient, high-yield genetics. This cultivar combines the vigor of classic landrace lines with modern resin production, offering an uplifting and motivating experience. It is favored for its tall growth, bright citrus-pine aroma, and clear, energizing effects.

May help withFocus Energy Motivation
AromaCitrusPineHerbalFloralLemon

Appearance

KC 42 plants typically exhibit a tall, sativa-like structure with elongated internodes and narrow leaflets. They tend to display strong apical dominance if left untrained. The buds are characterized by their spear-like shape, developing along the branches into colas that can reach significant lengths. The calyxes are moderately sized, and the flowers are generously coated in trichomes, giving them a frosted appearance, often highlighted by orange or tawny pistils. While generally bright green, some phenotypes may show faint purple hues under cooler temperatures.

Aroma & Flavor

The aroma of KC 42 is predominantly citrus-forward, with distinct notes of lemon-lime and sweet citrus zest. Underlying this are hints of fresh pine resin and herbal undertones, sometimes accompanied by a subtle floral scent. When ground, the bouquet can become sharper, with tropical fruit nuances. On the palate, the flavor mirrors the aroma, delivering lemon zest, lime peel, and pine notes, often followed by a green mango or herbal character. The finish is typically citrusy and piney, with a mild peppery sensation.

Effects

KC 42 is known for producing a clear, motivating, and energetic high that is primarily focused on the head. Users often report feeling more focused and uplifted after consumption. The sativa-dominant nature of this strain contributes to a cerebral experience that is generally invigorating rather than sedating. Its effects are often described as bright and stimulating, making it suitable for daytime use.

Terpenes & Cannabinoids

KC 42 typically contains THC levels ranging from the mid-teens to the low twenties, with common concentrations falling between 15-22%. CBD content is generally minimal, usually below 0.5%. The terpene profile is often rich in compounds like terpinolene, ocimene, and limonene, contributing to its characteristic citrus and pine aromas. Other terpenes such as pinene, caryophyllene, and linalool may also be present, influencing the overall sensory experience and effects.

Growing

KC 42 is recognized for its ruggedness and high-yield potential, performing well in both indoor and outdoor environments. It is noted for its resilience, making it suitable for growers in cooler climates. The plant has a tall structure and finishes flowering relatively quickly for a sativa, typically within 8 to 10 weeks indoors. Its morphology allows for good air circulation, and it responds well to training techniques. The yield is considered competitive, especially given its sativa heritage and manageable flowering period.

Origins & Lineage

Developed by KC Brains Holland, KC 42 is a sativa-leaning hybrid with roots in classic landrace genetics. While the precise parental lineage is not always detailed, it is commonly believed to be a cross involving New Zealand sativa lines and Thai or Thai-like genetics. This breeding approach aims to combine the vigor and resilience of these sativa influences with a more manageable growth cycle and contemporary resin production.

Frequently asked questions

What is the THC content of KC 42?
KC 42 typically has THC levels ranging from 15% to 22%, with most common results falling between 17% and 20%.
What are the dominant aromas and flavors of KC 42?
KC 42 is known for its strong citrus, lemon, and pine aromas and flavors, often complemented by herbal and sometimes floral or peppery notes.
What kind of effects does KC 42 produce?
KC 42 generally provides energetic, uplifting, and focused cerebral effects, making it a popular choice for daytime use.
What is the flowering time for KC 42?
KC 42 has a relatively quick flowering time for a sativa-leaning hybrid, typically finishing within 8 to 10 weeks when grown indoors.