Cultivation Traits Explained
Every strain has distinct cultivation characteristics that determine how it will behave in your grow space. Understanding these before you plant saves weeks of frustration and significantly improves your harvest.
Flowering Time
Flowering time is how many weeks a strain flowers before harvest — measured from when the light cycle is switched to 12/12 (for photoperiod) or from seed for autoflowers. Short (7–8 weeks): Indica-dominant varieties, Afghan-derived strains. Fast turnaround, smaller yield, heavier body effects. Medium (9–10 weeks): Most hybrid varieties. The sweet spot for commercial growing. Long (11–14 weeks): Sativa-dominant hybrids, Haze varieties. More complex terpene development, higher yields potential, cerebral effect profile. Very long (15+ weeks): Pure tropical sativas (Thai, Malawi, pure Haze). Outdoor-only in most climates. Extraordinary quality ceiling but impractical for most grows. Breeder-stated flowering times are typically minimum estimates — many strains benefit from an extra week.
Height & Structure
Height predictions from breeders refer to final height — but indoor growers should know that the stretch during early flowering (first 2–3 weeks after flip to 12/12) can double the plant's vegetative height. A plant that is 50cm at flip may finish at 90–120cm. Indica-dominant plants (Afghan Kush, Northern Lights, Bubba Kush) are typically compact and bushy — ideal for small grow tents. Sativa-dominant plants (Haze, Jack Herer, Sour Diesel) can reach 2–3m indoors without training — not practical in standard tents without aggressive LST (low-stress training), topping, or SCROG. Structure also affects air circulation: tight, dense canopies need more pruning for airflow; open, airy structures are naturally more mold-resistant.
Yield
Yield is expressed as grams per square meter (g/m²) indoors or grams per plant (g/plant) outdoors. Breeder yield claims are almost always achieved under optimal conditions (high-wattage lighting, perfect nutrition, experienced grower) — beginners should expect 30–60% of stated yields initially. Indoor yield benchmarks: Low (<300g/m²): Craft/quality-focused varieties, many autoflowers. Medium (300–500g/m²): Most quality photoperiod strains. High (500g/m²+): High-yielding commercial varieties (Critical Mass, Big Bud, Auto Zkittlez). Yield is a function of light intensity, canopy coverage, feeding quality, and grow technique — genetics set the ceiling, but environment and skill determine where you land.
Grow Difficulty
Grow difficulty ratings (Easy / Moderate / Difficult) reflect how demanding a strain is across several axes: Nutrient sensitivity: Some strains (many OG Kush phenotypes) are very sensitive to over-feeding and will tip-burn or show deficiencies at nutrient levels other strains thrive at. Climate sensitivity: Some genetics require precise humidity/temperature windows; others tolerate wide variation. Mold/pest resistance: Dense bud structure (Northern Lights, Critical Mass) is more vulnerable to botrytis than airier varieties. Training response: Some strains tolerate heavy topping and LST well; others stress easily. Autoflowers generally should not be heavily trained. For beginners: Northern Lights, White Widow, Blue Dream, and autoflowering feminized varieties are consistently rated easy.
Indoor vs. Outdoor Suitability
Not all strains are equally suited for all environments. Indoors, short-to-medium flowering, compact height strains are most practical. Outdoors, the key factor is whether the strain will finish before your first frost. In northern climates (Canada, Northern Europe, Pacific Northwest), strains finishing by late September/early October are essential. Equatorial sativa varieties (Thai, Malawi, pure Haze) will not finish in northern outdoor seasons. Mediterranean climates (California, Spain, Italy, Greece) have the widest selection — nearly any variety can be grown outdoors with excellent results. Mold-resistant genetics (Durban Poison, Jack Herer, many autoflowers) are important choices for wet climates.
- ✓Flowering time: 7–8 wks (fast) to 15+ wks (pure sativa)
- ✓Indoor height: check stretch (can 2x at flip)
- ✓Yield: beginner = 30–60% of stated breeder yield
- ✓Difficulty: Northern Lights / White Widow = easiest
- ✓Dense buds = higher mold risk in humid climates
- ✓Outdoor: match flowering time to your last frost date