The flowering phase is the stage of life when the plant no longer prioritizes leaves but forms flowers. The growth machine of the vegetative phase now becomes a plant that puts its energy into buds. During this time, the trichomes also develop, and the smell significantly increases.
Triggering Flowering
For photoperiodic plants, light is the switch. When daily illumination decreases – typically to 12 hours of light and 12 hours of uninterrupted darkness – the plant "understands" that autumn is approaching and begins to flower. Outdoors, the shortening day length takes care of this naturally. Autoflowering varieties are independent of this: they automatically switch to flowering after a set period, regardless of day length.
What Happens During Flowering
At the beginning, the plant often stretches vigorously again (the so-called "stretch") before the buds fill out. Gradually, dense inflorescences form, the resin glands (trichomes) increase, and the aroma becomes more intense. The nutrient requirements shift away from nitrogen towards phosphorus and potassium. Towards the end of flowering, the ripeness of the trichomes determines the harvest time.
Frequently Asked Questions About the Flowering Phase
How long does the flowering phase last?
Depending on the strain, usually around 7 to 11 weeks. Indica-dominant strains tend to be faster, Sativa-dominant ones often longer.
Why is uninterrupted darkness important during flowering?
Photoperiodic plants orient themselves by the dark phase. Light interruptions at night can disrupt flowering or confuse the plant.
How do I know when flowering begins?
By the first small flower sites at the nodes and – just before – by the renewed height growth, the stretch.

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Vegetative Phase
Trichome maturity